NCGR-Corvallis Pyrus Catalog

All Pear Cultivars, Selections, and Hybrids

Note: Scions cannot be certified free of Erwinia amylovora

Follow links to the Germplasm Resources Information Network (GRIN) for additional accession information.
Catalog last updated: 10 March 2016

NCGR-Corvallis Distribution Policies

Traits listed are intended for preliminary subgrouping of accessions. Traits are from germplasm release notices, published reports, or observations made at NCGR-Corvallis.

• A20 (Virus Indicator) = PI 637992 (2717.001) - Pyrus communis L.
  - Pedigree: Perry Pear seedling selection
  - Virus Biological Assays - Negative: A20-2004 PV-2002, Uncertain: NP-2003
  - Traits: VIRUS INDICATOR for bark disorders
• Aarer Pfundbirne (3x) = PI 282966 (8.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990
  - Traits: SCAB RESISTANT, HEIRLOOM, POLYPLOID (3x flow cytometry 2012)
• Abbe Fetel (Abate Fetel) = PI 260195 (10.004) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1990 PV-1995
  - Traits: FIRE BLIGHT SUSCEPTIBLE, LOW CHILL, QUINCE COMPATIBLE, DIPLOID (flow cytometry), HEIRLOOM, DNA Standard, CURATOR CHOICE, PARTHENOCARPIC
• Acres Home = PI 641287 (2807.001) - Pyrus hybrid
  - Traits: LOW CHILL, DIPLOID (flow cytometry 2012)
• Admiral Gervais = PI 255605 (11.004) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Akca = PI 324124 (12.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: ASGV-1989, Uncertain: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1990 PV-1989 VC-1989
  - Traits: EARLY RIPE, DIPLOID (flow cytometry)
• Alexandrina Bivort = PI 541489 (2032.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1995 PV-1995
  - Traits: EARLY RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Allexandrine Douillard = PI 541114 (13.003) - Pyrus communis L.
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: MONOLINIA RESISTANT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Alliance Franco-Russe = PI 260150 (14.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Positive: Pyronia-2002 Vein Yellows-1983, Negative: V.Crab-1988
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Ames = PI 541115 (15.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1990 PV-1990
  - Traits: FIRE BLIGHT RESISTANT, COLD HARDY, EARLY RIPE, DIPLOID (flow cytometry 2012)
• Amire Joannet (= Saint John's, Epargne?) (3x) = PI 541443 (1515.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2002 PV-2001
  - Traits: ANCIENT, VERY EARLY RIPE, HEIRLOOM, POLYPLOID (3x flow cytometry 2012)
• Ananaska Ceska = PI 483382 (1536.002) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Anderson (Andy) = PI 541533 (2141.002) - Pyrus communis L.
  - Pedigree: Bartlett x Rose of July (Rosee de Juillet)
  - Virus Biological Assays - Negative: NP-2001 PV-2001
  - Traits: apparently SELF-FERTILE, DIPLOID (flow cytometry 2012)
• Andre Desportes = PI 318866 (16.006) - Pyrus communis L.
  - Pedigree: Seedling of Williams bon Chretien (Bartlett).
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: MONOLINIA RESISTANT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Andrew (3x) = PI 617627 (2556.001) - Pyrus hybrid
  - Pedigree: P. ussuriensis x Bartlett
  - Virus Biological Assays - Negative: NP-1996 PV-1996
  - Traits: COLD HARDY, POLYPLOID (3x flow cytometry 2012)
• Angelica Di Saonara = PI 541326 (1057.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1988 M.micromalus-2002 N.Poiteau-1989 P.Crassane-1984 Pyronia-1988
  - Traits: VERY EARLY RIPE, DIPLOID (flow cytometry)
• Aniversarea = PI 483403 (1553.001) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1997 N.Poiteau-1985 Pyronia-1985 V.Crab-1992
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• Anjou = PI 617502 (63.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1998 N.Poiteau-1998 Pyronia-1998
  - Traits: VERY LATE RIPE, FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, DIPLOID (flow cytometry), HEIRLOOM
• Anjou - Columbia Red (Euwer Anjou) = PI 617558 (2377.002) - Pyrus communis L.
  - Pedigree: Bud mutation of cultivar Anjou
  - Virus Biological Assays - Negative: MM-1998 NP-1998 PV-1999
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, DIPLOID (flow cytometry 2012)
• Anjou - Dwarf = PI 541118 (201.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1997 N.Poiteau-1987 P.Crassane-1984 Pyronia-1988 V.Crab-1992
  - Traits: LATE RIPE, FIRE BLIGHT SUSCEPTIBLE,
• Anjou - Gebhard Red = PI 541248 (475.002) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Anjou, red bud mutation
  - Virus Lab Assays - Positive: PBCVd-2000
  - Virus Biological Assays - Negative: A20-2004 NP-1990 PV-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, DIPLOID (flow cytometry)
• Anjou - Naumes = PI 541365 (21.001) - Pyrus communis L.
  - Pedigree: Productive Anjou selection from Naumes Orchard
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986
  - Virus Biological Assays - Negative: M.micromalus-1998 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: LATE RIPE, FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, DIPLOID (flow cytometry)
• Anjou - Pine Grove Mutant = PI 617622 (2550.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1998 NP-1997 PV-1997
• Anjou - Russet = PI 541258 (503.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Anjou sport
  - Virus Biological Assays - Positive: P.Crassane-1984 Vein Yellows-1985, Negative: Bosc-1989
  - Traits: LATE RIPE, RUSSET FRUIT, DIPLOID (flow cytometry 2012)
• Antoni Sale (3x) = PI 654932 (2684.002) - Pyrus communis L.
  - Traits: SCAB RESISTANT, POLYPLOID (3x flow cytometry 2012)
• Arbi = PI 617617 (2543.001) - Pyrus communis L.
  - Pedigree: Local Tunisian cultivar
  - Virus Biological Assays - Negative: NP-2001 PV-1999
  - Traits: LOW CHILL, DIPLOID (flow cytometry 2012)
• Arganche = PI 264694 (23.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: ASGV-1989 PBCVd-2000
  - Virus Biological Assays - Negative: MM-2003 NP-1987 PV-1987 VC-1989
  - Traits: COMPACT HABIT, EARLY RIPE, MILDEW RESISTANT, DIPLOID (flow cytometry)
• Aristocrat (P. calleryana) = PI 541108 (2189.001) - Pyrus calleryana Decne.
  - Pedigree: Seedling selection from seedlot F. Meyer collected in China
  - Virus Biological Assays - Negative: MM-1997 NP-1989 PV-1990
  - Traits: FIRE BLIGHT SUSCEPTIBLE, ORNAMENTAL, DIPLOID (flow cytometry 2014)
• Aromata di Bistrita = PI 617545 (2354.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-2001 NP-1992 PV-1991
  - Traits: DIPLOID (flow cytometry 2012)
• Atlantic Queen (3x) = PI 541442 (1514.005) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1990, Uncertain: MM-2001
  - Traits: VERY LARGE FRUIT, POLYPLOID (3x flow cytometry 2012)
• Aurora = PI 541119 (25.001) - Pyrus communis L.
  - Pedigree: Margherite Marillat x Bartlett
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: Bosc-1989 LA62-1983 M.micromalus-1995 N.Poiteau-2003 Pyronia-1985 V.Crab-1985
  - Traits: QUINCE COMPATIBLE, DIPLOID (flow cytometry) CURATOR CHOICE
• Autumn Red = PI 637985 (2375.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Random seedling selection from cultivar lot
  - Virus Biological Assays - Positive: NP-1992, Negative: PV-1991
  - Traits: RED SKIN
• Autumn Red = PI 637985 (2375.003) - Pyrus communis L.
  - Pedigree: Random seedling selection from cultivar lot
  - Virus Biological Assays - Negative: NP-2003, Uncertain: PV-2002
  - Traits: RED SKIN, DIPLOID (flow cytometry 2012)
• Avery Park (P. calleryana) - upright = PI 541109 (2190.001) - Pyrus calleryana Decne.
  - Pedigree: P. calleryana seedling selection
  - Virus Biological Assays - Negative: MM-1997 NP-1989 PV-1989
  - Traits: ORNAMENTAL, LOW CHILL, DIPLOID (flow cytometry 2014)
• Ayer = PI 541120 (26.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Negative: LA62-1983 N.Poiteau-1989 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: FIRE BLIGHT RESISTANT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Ayers = PI 541722 (1059.005) - Pyrus hybrid
  - Pedigree: Garber x Anjou
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: FIRE BLIGHT RESISTANT, SCAB RESISTANT, ATTRACTIVE, SIMILAR TO SECKEL, CURATOR CHOICE, DIPLOID (flow cytometry 2012)
• B II-3-25-27 (Bartlett x P. salicifolia) - Russia = PI 654950 (2768.001) - Pyrus hybrid
• B-11 = PI 437066 (906.001) - Pyrus communis L.
  - Pedigree: Selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: LA62-1983 M.micromalus-1998 N.Poiteau-1985 Pyronia-1985
  - Traits: ROOTSTOCK, DIPLOID (flow cytometry)
• B-12 = PI 437067 (901.001) - Pyrus communis L.
  - Pedigree: Selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: LA62-1983 M.micromalus-2003 N.Poiteau-1987 P.Crassane-1985 Pyronia-1985
  - Traits: ROOTSTOCK, MILDEW RESISTANT, DIPLOID (flow cytometry)
• B-13 (Bartlett seedling - Virus Indicator) = PI 541439 (708.001) - Pyrus communis L.
  - Pedigree: Probably Bartlett x Anjou
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1991
  - Traits: VIRUS INDICATOR
• B-22 = PI 541970 (2288.001) - Pyrus communis L.
  - Pedigree: Rootstock selection
  - Virus Biological Assays - Negative: MM-1996 NP-1990 PV-1992 VC-1992
  - Traits: ROOTSTOCK
• B-27 = PI 541972 (2290.001) - Pyrus hybrid
  - Pedigree: Rootstock selection
  - Virus Biological Assays - Negative: NP-1990 PV-1991
  - Traits: ROOTSTOCK
• B-37 (P. communis) - Ukraine = PI 322711 (903.001) - Pyrus communis L.
  - Pedigree: Possibly originally collected wild
  - Virus Biological Assays - Negative: B13-1983 LA62-1983 N.Poiteau-1992 P.Crassane-1985 Pyronia-1992
  - Traits: VERY LATE RIPE
• BP-1 (Bien Donne 1) = PI 436538 (101.001) - Pyrus communis L.
  - Pedigree: Seedling selection from seed collected wild in S. Africa
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: Bosc-1989 LA62-1983 M.micromalus-2003 N.Poiteau-1988 P.Crassane-1984 Pyronia-1997
  - Traits: LATE RIPE, ROOTSTOCK-Semidwarf, Precocious, DIPLOID (flow cytometry)
• BP-2 (Bien Donne 2) = PI 420810 (102.001) - Pyrus communis L.
  - Pedigree: Seedling selection from seed collected wild in S. Africa
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: ROOTSTOCK-Vigorous, Precocious, DIPLOID (flow cytometry 2012)
• BP-3 (B-14) = PI 541971 (2289.001) - Pyrus hybrid
  - Pedigree: Seedling selection from seed collected wild in S. Africa
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1990 PV-1991
  - Traits: ROOTSTOCK-Vigorous, Precocious, SCAB RESISTANT, DECLINE SUSCEPTIBLE, DIPLOID (flow cytometry 2012)
• Ba Li Xiang [Ba Li Hsiang] = PI 541985 (27.002) - Pyrus ussuriensis Maxim. - VIRUS INFECTED
  - Pedigree: old pear local selection from Liaoning and Hebei Provinces
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Positive: MM-2003, Negative: NP-1988 PV-1988
  - Traits: VERY LATE RIPE, FIRE BLIGHT RESISTANT, MILDEW RESISTANT, ROOTSTOCK, SCAB RESISTANT, DIPLOID (flow cytometry), HEIRLOOM
• Bai Li = PI 654959 (2785.001) - Pyrus ×bretschneideri Rehder
  - Pedigree: Recived from Kazakhstan, where they are used as pear rootstocks. Originated in China.
  - Virus Biological Assays - Negative: NP-2003
  - Traits: ROOTSTOCK, DIPLOID (flow cytometry 2012)
• Baldwin = PI 617669 (2614.001) - Pyrus sp. - VIRUS INFECTED
  - Pedigree: Origin unknown
  - Virus Biological Assays - Positive: NP-2003, Negative: PV-2000
  - Traits: LOW CHILL 480 hrs, DIPLOID (flow cytometry 2012)
• Bantam = PI 617554 (2371.001) - Pyrus communis L.
  - Pedigree: Unknown partneage - seedling selection
  - Virus Biological Assays - Negative: MM-1999 NP-1992 PV-1992
  - Traits: FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry 2012)
• Bariker (Barikerbirne) (3x) = PI 134831 (30.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1989 VC-1989
  - Traits: POLYPLOID (3x flow cytometry 2012)
• Barillet Deschamp = PI 541122 (31.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Positive: P.Crassane-1984, Negative: V.Crab-1988
  - Traits: FIRE BLIGHT RESISTANT
• Barillet Deschamp = PI 541122 (31.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: PV-2000, Uncertain: NP-2001
  - Traits: FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry 2012)
• Barland (3x) = PI 541123 (33.001) - Pyrus communis L.
  - Pedigree: Parentage unknown - probably ancient seedling tree
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986
  - Virus Biological Assays - Negative: M.micromalus-1998 N.Poiteau-1989 Pyronia-1985 V.Crab-1985
  - Traits: PERRY, ANCIENT, BITTERSHARP (HIGH ACID, HIGH TANNIN), POLYPLOID (3x flow cytometry 2008), HEIRLOOM
• Barnet = PI 541124 (35.001) - Pyrus communis L.
  - Pedigree: Parentage unknown
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: Bosc-1989 LA62-1983 M.micromalus-1999 N.Poiteau-1989 Pyronia-1985
  - Traits: PERRY, LATE BLOOM, SWEET (LOW ACID, LOW TANNIN), HEIRLOOM, DIPLOID (flow cytometry 2012)
• Baronne Leroy = PI 215321 (36.002) - Pyrus communis L.
  - Pedigree: possibly a seedling of cultivar Bonne de Printemps
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Barseck = PI 541327 (1060.001) - Pyrus communis L.
  - Pedigree: Bartlett x Seckel
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1988 P.Crassane-1984 Pyronia-1988
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bartlett = PI 300693 (38.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: Bosc-1987 M.micromalus-1997 N.Poiteau-1990 P.Crassane-1984 Pyronia-1988 V.Crab-1988
  - Traits: FIRE BLIGHT SUSCEPTIBLE, VIRUS INDICATOR, DIPLOID (flow cytometry), HEIRLOOM, MONOLINIA RESISTANT, DNA Standard
• Bartlett - Bagley Russet = PI 541121 (28.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: RUSSET FRUIT
• Bartlett - Eller = PI 541308 (208.001) - Pyrus communis L.
  - Pedigree: Early ripening sport of Bartlett
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1997 N.Poiteau-1987 P.Crassane-1984 Pyronia-1987 V.Crab-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE,, DIPLOID (flow cytometry 2012)
• Bartlett - French Compatible = PI 617536 (2335.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1992 PV-1991
  - Traits: FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, DIPLOID (flow cytometry)
• Bartlett - Improved = PI 541340 (1101.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: DIPLOID (flow cytometry 2012)
• Bartlett - Low Chill from S. Africa = PI 403914 (608.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: low chill selection from South Africa
  - Virus Biological Assays - Positive: Pyronia-1998, Negative: Bosc-1989
  - Traits: LOW CHILL, DIPLOID (flow cytometry 2012)
• Bartlett - Low Chill from S. Africa = PI 617605 (2530.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Presumably - low chill sport of Bartlett
  - Virus Biological Assays - Positive: NP-1997 PV-1997
  - Traits: LOW CHILL
• Bartlett - Low Chill from S. Africa = PI 617605 (2530.002) - Pyrus communis L.
  - Pedigree: Presumably - low chill sport of Bartlett
  - Virus Biological Assays - Negative: PV-2001
  - Traits: LOW CHILL, DIPLOID (flow cytometry)
• Bartlett - Max Red = PI 541249 (478.001) - Pyrus communis L.
  - Pedigree: Bartlett bud mutation
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-2003 N.Poiteau-2003 P.Crassane-1984 Pyronia-1985 V.Crab-1992
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, DIPLOID (flow cytometry)
• Bartlett - Max Red 4x? (not 4x) = PI 541344 (1118.002) - Pyrus communis L.
  - Pedigree: Bartlett bud mutation
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, POLYPLOID? DIPLOID (flow cytometry 2012)
• Bartlett - Nye Russet = PI 541236 (423.001) - Pyrus communis L.
  - Pedigree: Bartlett bud mutation
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1996 N.Poiteau-1988 P.Crassane-1984 Pyronia-1984 V.Crab-1991
  - Traits: RUSSET FRUIT, DIPLOID (flow cytometry), CURATOR CHOICE
• Bartlett - Rosired = PI 541255 (493.005) - Pyrus communis L.
  - Pedigree: Bartlett bud mutation
  - Virus Biological Assays - Negative: NP-1999 PV-2001
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, DIPLOID (flow cytometry 2012)
• Bartlett - Russet (Moyer) = PI 637998 (2737.001) - Pyrus communis L.
  - Pedigree: Bud mutation of Bartlett
  - Virus Biological Assays - Negative: NP-2003
  - Traits: RUSSET FRUIT, DIPLOID (flow cytometry 2012)
• Bartlett - Sensation Red = PI 292507 (396.002) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Probably a Bartlett bud mutation
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Positive: MM-2003, Negative: NP-1989 PV-1987
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, DIPLOID (flow cytometry)
• Bartlett - Swiss compatible with Quince = PI 307508 (607.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: Bosc-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bartlett - Swiss compatible with Quince = PI 267940 (1347.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1998 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, DIPLOID (flow cytometry), HEIRLOOM
• Batjarka (3x) = PI 483391 (1545.002) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1987 PV-1989
  - Traits: PSYLLA RESISTANT, LOW CHILL 730 hrs, SCAB RESISTANT, POLYPLOID (3x flow cytometry 2007), HEIRLOOM
• Beierschmitt = PI 541455 (1306.003) - Pyrus communis L.
  - Pedigree: Seedling selection of cultivar Bartlett
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1990 PV-1991, Uncertain: MM-2003
  - Traits: QUINCE COMPATIBLE, COLD HARDY, DIPLOID (flow cytometry)
• Bella di Giugno (=Mirandino Rosso) = PI 324125 (40.004) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1991 PV-1989 VC-1989
  - Traits: VERY EARLY RIPE, DIPLOID (flow cytometry)
• Belle Angevine (3x) = PI 215322 (42.002) - Pyrus communis L.
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1989 VC-1989
  - Traits: VERY LATE RIPE, ANCIENT, MONOLINIA RESISTANT, HEIRLOOM, VERY LARGE FRUIT, POLYPLOID (3x flow cytometry 2012)
• Belle Guerandaise = PI 322034 (46.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: LA62-1983 N.Poiteau-1992 P.Crassane-1984 Pyronia-1988 V.Crab-1988
  - Traits: QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Belle Lucrative = PI 279335 (215.001) - Pyrus communis L. - VIRUS INFECTED
  - Traits: HEIRLOOM
• Belle Lucrative = PI 295091 (278.003) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1989, Uncertain: MM-2003
  - Traits: LATE RIPE, DIPLOID (flow cytometry), COMPACT HABIT, HEIRLOOM
• Belle Lucrative (=Fondante D'Automne) = PI 263680 (228.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1997 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Belle Picarde = PI 260152 (48.003) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: LATE RIPE, HEIRLOOM, VERY LARGE FRUIT, DIPLOID (flow cytometry 2012)
• Belle Poitevien = PI 541304 (45.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: M.micromalus-1995 N.Poiteau-1985 Pyronia-1985 V.Crab-1985, Uncertain: Bosc-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Belle de Beugny = PI 541125 (43.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• Belle de Feron = PI 541126 (44.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bellissime d'Hiver = PI 654945 (2757.001) - Pyrus communis L.
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bera Wysmienita = PI 483368 (1522.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1990
  - Traits: DIPLOID (flow cytometry 2012)
• Bere-obtjabra (oktjabra?) = PI 232872 (50.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: COLD HARDY, Poor fruit quality, DIPLOID (flow cytometry 2012)
• Bergamote Tardive de Ganzel = PI 279328 (1066.003) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1992 PV-1992
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bergamote d'Ete = PI 541128 (52.002) - Pyrus communis L.
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: ANCIENT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bergamote de la Pentecote = PI 105136 (1065.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1998 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: DIPLOID (flow cytometry), HEIRLOOM
• Bergamotte Arsene Sannier = PI 136620 (1064.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: COLD RESISTANT, LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bergamotte Esperen = PI 260153 (53.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Chance seedling
  - Virus Biological Assays - Positive: Pyronia-2002 Vein Yellows-1986
  - Traits: LATE RIPE (WINTER PEAR), FROST RESISTANT, MONOLINIA RESISTANT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bergamotte Sageret = PI 541129 (54.002) - Pyrus communis L.
  - Pedigree: Seedling of an unnamed P. communis cultivar
  - Virus Lab Assays - Negative: ASGV-1989
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: VERY LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bergamotte d'Automne = PI 541127 (51.002) - Pyrus communis L.
  - Pedigree: Unknown, ancient cultivar
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bergamotte de Baillargues = PI 541523 (2131.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1989 Pyronia-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Besi d'Hery = PI 541130 (56.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1987 PV-1987
  - Traits: LATE RIPE, ANCIENT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Besi de La Motte = PI 541131 (57.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: ASGV-1989 TOMRSV-1986
  - Virus Biological Assays - Negative: LA62-1983 N.Poiteau-1987 P.Crassane-1984 Pyronia-1988 V.Crab-1988
  - Traits: ANCIENT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bessemianka = PI 654936 (2706.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Uncertain: NP-2003
  - Traits: FIRE BLIGHT SUSCEPTIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bestever = PI 541559 (2292.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Comice x Louis Pasteur
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Positive: VY-2004, Negative: MM-1998 NP-1993 PV-1993, Uncertain: ASGV-2004
  - Traits: DIPLOID (flow cytometry), HEIRLOOM
• Beurré Alexandre Lucas (3x) = PI 541132 (58.004) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Chance seedling
  - Virus Lab Assays - Positive: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1993 PV-1993
  - Traits: QUINCE COMPATIBLE, POLYPLOID (3x flow cytometry 2008), HEIRLOOM, LATE RIPE (WINTER PEAR), FIRE BLIGHT RESISTANT
• Beurré Auguste = PI 541329 (1067.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1995 PV-1991
  - Traits: DIPLOID (flow cytometry 2012)
• Beurré Capiaumont = PI 104532 (1073.004) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1990 PV-1987
  - Traits: QUINCE COMPATIBLE, DIPLOID (flow cytometry), HEIRLOOM
• Beurré Clairgeau = PI 541133 (59.002) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Duchess D'Angouleme
  - Virus Lab Assays - Negative: ASGV-1989 PBCVd-2000
  - Virus Biological Assays - Negative: MM-2003 NP-1987 PV-1987
  - Traits: LATE RIPE, FROST RESISTANT, MONOLINIA RESISTANT, DIPLOID (flow cytometry), HEIRLOOM
• Beurré Diel (3x) = PI 541141 (71.002) - Pyrus communis L.
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: LATE RIPE, FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, POLYPLOID (3x flow cytometry 2007), HEIRLOOM, MONOLINIA RESISTANT
• Beurré Dilly = PI 264192 (106.002) - Pyrus communis L.
  - Pedigree: Seedling selection or chance seedling
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: EARLY RIPE, SCAB RESISTANT, QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré Dubuisson = PI 255607 (72.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1987 PV-1987
  - Traits: LATE RIPE, QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré Dumont = PI 541142 (74.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: ASGV-1989 PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1990 PV-1987 VC-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE, MONOLINIA RESISTANT, DIPLOID (flow cytometry), HEIRLOOM
• Beurré Easter = PI 483363 (75.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: ASGV-1989 PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1995
  - Traits: VERY LATE RIPE, QUINCE COMPATIBLE, DIPLOID (flow cytometry), HEIRLOOM
• Beurré Flon = PI 105548 (1069.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1989 PV-1987
  - Traits: LATE RIPE, DIPLOID (flow cytometry), HEIRLOOM, FIRE BLIGHT RESISTANT
• Beurré Fouqueray = PI 541143 (76.002) - Pyrus communis L.
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990
  - Traits: QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré Giffard = PI 541144 (77.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: MM-2002 NP-1990
  - Traits: QUINCE COMPATIBLE, EARLY RIPE, COLD HARDY (fruited in Anchorage), DIPLOID (flow cytometry), HEIRLOOM
• Beurré Giffard = PI 541548 (2274.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1990 PV-1991 VC-1991
  - Traits: QUINCE COMPATIBLE, COLD HARDY (fruited in Anchorage), HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré Gris = PI 541145 (78.002) - Pyrus communis L.
  - Pedigree: Unknown - lost in antiquity
  - Virus Lab Assays - Negative: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE, ANCIENT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré Gris d'Hiver Nouveau = PI 541146 (79.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• Beurré Hardy = PI 300691 (1187.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: ASGV-1989 PBCVd-2000 TOMRSV-1986
  - Virus Biological Assays - Negative: LA62-1983 M.micromalus-1997 N.Poiteau-1990 Pyronia-1987
  - Traits: FIRE BLIGHT SUSCEPTIBLE, VIRUS INDICATOR, QUINCE COMPATIBLE, MONOLINIA RESISTANT, DIPLOID (flow cytometry), HEIRLOOM
• Beurré Hardy - Royal Red = PI 541363 (480.002) - Pyrus communis L.
  - Pedigree: Beurre Hardy sport
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2003 NP-1989 PV-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, DIPLOID (flow cytometry)
• Beurré Henri Courcelle = PI 279329 (82.002) - Pyrus communis L.
  - Pedigree: Bergamotte Esperen seedling
  - Virus Lab Assays - Negative: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré Inflancka = PI 307539 (83.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1997 NP-1992 PV-1992
  - Traits: DIPLOID (flow cytometry 2012)
• Beurré Jean van Geert = PI 280030 (84.003) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1990
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré Madame Henre Lamy = PI 131489 (1070.002) - Pyrus communis L.
  - Pedigree: Marguerite Marillat x Clairgeau
  - Virus Biological Assays - Negative: NP-1990 PV-1991
  - Traits: LATE RIPE, VERY LARGE FRUIT, DIPLOID (flow cytometry 2012)
• Beurré Millet = PI 541148 (86.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré Naghin = PI 541515 (2123.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: PV-2001
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré Phillippe Delfosse = PI 541149 (90.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: VERY LATE RIPE, DIPLOID (flow cytometry 2012)
• Beurré Rance (3x) = PI 541487 (2030.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: N.Poiteau-1988 Vein Yellows-1985
  - Traits: HEIRLOOM, POLYPLOID (3x flow cytometry 2012)
• Beurré Six = PI 617675 (2620.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: PV-2002
  - Traits: HEIRLOOM, MONOLINIA RESISTANT, DIPLOID (flow cytometry 2012)
• Beurré Slucka = PI 307540 (91.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1997 NP-1990 PV-1987 VC-1992
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré Superfin = PI 541150 (93.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Positive: Pyronia-1990, Negative: Bosc-1989 V.Crab-1988
  - Traits: QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré Superfin = PI 541150 (558.002) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Chance seedling
  - Virus Biological Assays - Positive: NP-1997 PV-1997
  - Traits: QUINCE COMPATIBLE, DIPLOID (flow cytometry), HEIRLOOM, CURATOR CHOICE
• Beurré d'Amanlis (3x) = PI 541134 (60.002) - Pyrus communis L.
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990
  - Traits: QUINCE COMPATIBLE, POLYPLOID (3x flow cytometry 2007), HEIRLOOM
• Beurré d'Angleterre = PI 541136 (62.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1987 PV-1987 VC-1989
  - Traits: VERY LATE RIPE, ANCIENT, SCAB RESISTANT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré d'Arenberg = PI 295083 (64.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1999 NP-1990 PV-1987 VC-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré d'Avril = PI 136621 (1068.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: VERY LATE RIPE, DIPLOID (flow cytometry 2012)
• Beurré de Bollwiller = PI 541137 (65.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré de Jonghe = PI 263679 (68.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré de Mortillet = PI 215325 (87.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: PV-2000
  - Traits: HEIRLOOM
• Beurré de Mortillet = PI 215325 (87.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2001 PV-2000
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré de Nantes = PI 541139 (69.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: ASGV-1989
  - Virus Biological Assays - Negative: NP-1987 PV-1987
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Beurré de Saint Nicolas = PI 541140 (70.003) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1987 PV-1987 VC-1988
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bileu = PI 617555 (2372.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1991 PV-1991 VY-1992
  - Traits: RED SKIN
• Bileu = PI 617555 (2372.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1998 NP-1995 PV-1995
  - Traits: RED SKIN, DIPLOID (flow cytometry 2012)
• Birleshik 84-2 - Turkmenistan = PI 665805 (2774.001) - Pyrus sp.
  - Virus Biological Assays - Negative: NP-2004
  - Traits: DIPLOID (flow cytometry 2012)
• Biscamp = PI 617602 (2526.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-1997 PV-1997
  - Traits: LOW CHILL 250 hrs, SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Blake's Pride = PI 657922 (2881.001) - Pyrus communis L.
  - Pedigree: US 446 x US 505
  - Virus Biological Assays - Negative: NP-2009 PV-2009
  - Traits: DIPLOID (flow cytometry 2012), FIRE BLIGHT RESISTANT
• Blakeley's Bartlett = PI 617604 (2529.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1997 PV-1997
  - Traits: LOW CHILL, DIPLOID (flow cytometry 2012)
• Blakeney Red = PI 541151 (95.001) - Pyrus communis L.
  - Pedigree: Possibly a seedling of cultivar Thorn
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: Bosc-1989 LA62-1983 M.micromalus-1995 N.Poiteau-2003 P.Crassane-1985 Pyronia-1991 V.Crab-1989
  - Traits: PERRY, MEDIUM SHARP (MEDIUM ACID, MEDIUM TANNIN), DIPLOID (flow cytometry), HEIRLOOM
• Blanquet Precoce = PI 541330 (1071.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: VERY EARLY RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Blanquilla (=Spadona) = PI 617587 (2510.002) - Pyrus communis L.
  - Traits: LOW CHILL, EARLY RIPE, DIPLOID (flow cytometry 2012)
• Blanquilla (=Spadona) = PI 617587 (2510.003) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: MM-2003, Negative: NP-2003 PV-2002
  - Traits: DIPLOID (flow cytometry), LOW CHILL, EARLY RIPE
• Bloodgood (=Julienne?) = PI 638013 (2823.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-2004
  - Traits: QUINCE COMPATIBLE, HEIRLOOM, EARLY RIPE, DIPLOID (flow cytometry 2012)
• Bojka = PI 483369 (1523.006) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1990 VC-1988
  - Traits: DIPLOID (flow cytometry 2012)
• Bon Chretien Bonnamour = PI 541152 (97.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1992 PV-1992
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bon Chretien d'Hiver = PI 255609 (98.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990
  - Traits: VERY LATE RIPE, ANCIENT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bonne d'Ezee = PI 541360 (100.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: Bosc-1989 LA62-1983 M.micromalus-1995 N.Poiteau-1993 P.Crassane-1984 Pyronia-1997 V.Crab-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Bosarge = PI 641289 (2809.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Biological Assays - Positive: MM-2003
  - Traits: LOW CHILL, SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Bosc - Gebhard Russetless = PI 541509 (2115.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Sport of cultivar Beurre Bosc
  - Virus Lab Assays - Negative: ASGV-1989
  - Virus Biological Assays - Positive: Pyronia-1990 Vein Yellows-1991, Negative: N.Poiteau-1989 V.Crab-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE
• Bosc - Golden Russet = PI 637986 (2376.001) - Pyrus communis L.
  - Pedigree: Sport of cultivar Beurre Bosc
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1992 PV-1992
  - Traits: RUSSET FRUIT, DIPLOID (flow cytometry), CURATOR CHOICE
• Bosc - OP-5 = PI 541387 (1165.001) - Pyrus communis L.
  - Pedigree: Seedling selection.
  - Virus Biological Assays - Negative: N.Poiteau-1985 P.Crassane-1985 Pyronia-1988 V.Crab-1988
  - Traits: FIRE BLIGHT SUSCEPTIBLE, VIRUS INDICATOR, SCAB RESISTANT, RUSSET SKIN, DIPLOID (flow cytometry), HEIRLOOM
• Bou Tsu Li = PI 617673 (2618.001) - Pyrus pyrifolia (Burm. f.) Nakai - VIRUS INFECTED
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Positive: NP-2003, Negative: PV-2001
  - Traits: SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Bradford (P. calleryana) = PI 617646 (2577.001) - Pyrus calleryana Decne.
  - Pedigree: Seedling selection from seedlot PI 47261
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1996 NP-1996 PV-1996
  - Traits: ORNAMENTAL, MILDEW RESISTANT, LOW CHILL, DIPLOID (flow cytometry)
• Brandy = PI 541305 (103.001) - Pyrus communis L.
  - Pedigree: Parentage unknown
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: M.micromalus-1995 Pyronia-1985 V.Crab-1989, Uncertain: N.Poiteau-2003
  - Traits: PERRY, MEDIUM SHARP (MEDIUM ACID, MEDIUM TANNIN), DIPLOID (flow cytometry), HEIRLOOM
• Brignoles = PI 617641 (2572.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-2001 NP-1996 PV-1998, Uncertain: VY-1996
  - Traits: VERY LATE RIPE, DIPLOID (flow cytometry 2012), PERRY?
• Broussard = PI 617659 (2604.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-2002 PV-2001
  - Traits: LATE RIPE, LOW CHILL, DIPLOID (flow cytometry 2012)
• Brown's Bartlett = PI 617671 (2616.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Seedling
  - Virus Biological Assays - Positive: NP-2002 PV-2002
  - Traits: LOW CHILL, DIPLOID (flow cytometry 2012)
• Buffum = PI 541153 (108.002) - Pyrus communis L.
  - Pedigree: Possibly a seedling of cultivar White Doyenne
  - Virus Lab Assays - Negative: PBCVd-2000, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Burford Pear = PI 641291 (2811.001) - Pyrus communis L.
  - Pedigree: Possibly an old French cultivar
  - Virus Biological Assays - Negative: NP-2003
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• Burkett = PI 541154 (109.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: ASGV-1989 TOMRSV-1986
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1988 P.Crassane-1984
  - Traits: FIRE BLIGHT RESISTANT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Burkett x P. betulifolia = PI 541786 (1358.001) - Pyrus hybrid
  - Pedigree: Burkett x P. betulifolia seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK, SCAB RESISTANT
• Butirra Precoce Morettini = PI 276764 (115.001) - Pyrus communis L.
  - Pedigree: Coscia x Williams
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: Bosc-1989 LA62-1983 M.micromalus-1995 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1992
  - Traits: QUINCE COMPATIBLE, DIPLOID (flow cytometry), SCAB RESISTANT (Australia)
• Butirra Rosata Morettini = PI 282935 (119.001) - Pyrus communis L.
  - Pedigree: Coscia x Beurre Clairgeau
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: Bosc-1989 LA62-1983 M.micromalus-1996 N.Poiteau-1990 P.Crassane-1984 Pyronia-1985 V.Crab-1989
  - Traits: VERY LARGE FRUIT, DIPLOID (flow cytometry), CURATOR CHOICE
• Butirra di Roma = PI 324126 (112.001) - Pyrus communis L.
  - Pedigree: Butirra Clairgeau x Williams (magnetic pollen)
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1995 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1992
  - Traits: DIPLOID (flow cytometry 2012)
• Butt = PI 541156 (121.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: M.micromalus-1995 N.Poiteau-1990 P.Crassane-1984 Pyronia-1985 V.Crab-1989, Uncertain: Bosc-1989
  - Traits: PERRY, LATE RIPE, BITTERSHARP (MEDIUM ACID, HIGH TANNIN), HEIRLOOM, DIPLOID (flow cytometry 2012)
• Buttidu de Austu = PI 665798 (2865.001) - Pyrus communis L.
  - Traits: DIPLOID (flow cytometry 2012)
• Buzas Korte (= Wheat Pear) (3x) = PI 449285 (22.001) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Negative: Bosc-1989 LA62-1983 M.micromalus-1996 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1985
  - Traits: VERY EARLY RIPE, POLYPLOID (3x flow cytometry 2012)
• C.P. 6-48 = PI 541106 (2187.001) - Pyrus calleryana Decne.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: MM-2001 NP-1989 PV-1989
  - Traits: EARLY BLOOM, ORNAMENTAL, LOW CHILL, DIPLOID (flow cytometry 2014)
• Cabot = PI 657926 (2919.001) - Pyrus communis L.
  - Traits: COLD HARDY, DIPLOID (flow cytometry 2012)
• California = PI 541157 (123.001) - Pyrus communis L.
  - Pedigree: Max Red Bartlett x Comice
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: LA62-1983 N.Poiteau-1990 P.Crassane-1984 Pyronia-1985 V.Crab-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, QUINCE COMPATIBLE, DIPLOID (flow cytometry 2012)
• Campas No.1 = PI 541705 (124.002) - Pyrus hybrid
  - Pedigree: P. pyrifolia hybrid
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1989 VC-1989
  - Traits: FIRE BLIGHT RESISTANT, LOW CHILL, DIPLOID (flow cytometry 2012)
• Campas No.2 = PI 541706 (125.003) - Pyrus hybrid
  - Pedigree: P. pyrifolia hybrid
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: VERY LATE RIPE, FIRE BLIGHT RESISTANT, LOW CHILL
• Canal Pear = PI 541158 (127.001) - Pyrus communis L.
  - Pedigree: Forelle x Max Red Bartlett
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: Bosc-1988 LA62-1983 N.Poiteau-1987 Pyronia-1987 V.Crab-1988
  - Traits: RED SKIN, DIPLOID (flow cytometry 2012)
• Canner (Waite?) = PI 541159 (128.002) - Pyrus hybrid
  - Pedigree: P. pyrifolia hybrid, possibly a seedling of cv. Kieffer
  - Virus Biological Assays - Negative: NP-1993
  - Traits: FIRE BLIGHT RESISTANT, SCAB RESISTANT, MALE STERILE? HEIRLOOM, DIPLOID (flow cytometry 2012)
• Capital (P. calleryana) = PI 541013 (662.001) - Pyrus calleryana Decne.
  - Pedigree: OP seedling selection of cultivar Bradford
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987, Uncertain: M.micromalus-2003
  - Traits: ORNAMENTAL, DIPLOID (flow cytometry), Potential Anjou Pollenizer
• Carigradsko Alice = PI 541331 (1074.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1995 VC-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Carigradsko Avce = Q 36684 (2696.002) - Pyrus communis L.
• Carrick = PI 617573 (2456.001) - Pyrus communis L.
  - Pedigree: Seckel x Garber
  - Virus Biological Assays - Negative: NP-1992 PV-1993
  - Traits: FIRE BLIGHT RESISTANT, LOW CHILL, PROMISING IN BRAZIL, QUINCE COMPATIBLE, DIPLOID (flow cytometry 2012)
• Cascade = PI 541472 (1725.002) - Pyrus communis L.
  - Pedigree: Max Red Bartlett x Comice
  - Virus Lab Assays - Negative: PBCVd-2000 PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1989 PV-1991
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, DIPLOID (flow cytometry)
• Cayuga = PI 541160 (129.002) - Pyrus hybrid
  - Pedigree: Seedling of cultivar Seckel
  - Virus Lab Assays - Negative: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1989 VC-1989
  - Traits: FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry 2012)
• Cebulka = PI 312495 (130.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1997 NP-1995 PV-1995 VC-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Cedar Lane Farm 1 = PI 617552 (2369.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: COLD HARDY, DIPLOID (flow cytometry 2012)
• Cedar Lane Farm 3 = PI 617553 (2370.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1999 NP-1993 PV-1997
  - Traits: COLD HARDY, DIPLOID (flow cytometry 2012)
• Changpa Li = PI 617619 (2547.001) - Pyrus ussuriensis Maxim. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1999 PV-1999
  - Traits: SCAB RESISTANT
• Chanticleer (P. calleryana) = PI 541105 (2186.001) - Pyrus calleryana Decne.
  - Virus Biological Assays - Negative: MM-1997 NP-1989 PV-1991
  - Traits: FIRE BLIGHT RESISTANT, ORNAMENTAL, LOW CHILL, DIPLOID (flow cytometry), DNA STANDARD
• Chapin = PI 541161 (131.001) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Seckel
  - Virus Lab Assays - Negative: ASGV-1989 TOMRSV-1986
  - Virus Biological Assays - Negative: LA62-1983 N.Poiteau-1985 Pyronia-1987 V.Crab-1988
  - Traits: DIPLOID (flow cytometry 2012)
• Charles Ernest = PI 541522 (2130.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: N.Poiteau-1989 Pyronia-1989 Vein Yellows-1991, Negative: V.Crab-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Charles Escaig = PI 131123 (1075.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: P.Crassane-1984 Vein Yellows-1985
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• Charles Harris = PI 617599 (2523.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-1999 PV-1997
  - Traits: LATE RIPE, LOW CHILL 450 hrs, SCAB RESISTANT, LARGE FRUIT, DIPLOID (flow cytometry 2012)
• Chasseurs = PI 541162 (132.002) - Pyrus communis L.
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Cherry Pear = PI 260200 (1275.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: N.Poiteau-1990, Uncertain: M.micromalus-2001
  - Traits: VERY EARLY RIPE, DIPLOID (flow cytometry 2012)
• Chiao-Ma = PI 665778 (2853.001) - Pyrus ussuriensis Maxim.
  - Traits: DIPLOID (flow cytometry 2012)
• Chieh Li x Japanese Golden Russet (Decline Resist.) = PI 541760 (1226.001) - Pyrus hybrid
  - Pedigree: Chieh Li x Jap. Gold Russet
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: ROOTSTOCK, PEAR DECLINE RESISTANT, DIPLOID (flow cytometry 2014)
• Chieh Li x Japanese Golden Russet (Decline Susc.) = PI 541761 (1227.001) - Pyrus hybrid
  - Pedigree: Chieh Li x Jap. Gold. Russet
  - Virus Biological Assays - Negative: N.Poiteau-1991 Pyronia-1988 V.Crab-1991
  - Traits: ROOTSTOCK, SCAB RESISTANT, PEAR DECLINE SUSCEPTIBLE
• Chien Li = PI 617537 (2338.001) - Pyrus ussuriensis Maxim.
  - Virus Biological Assays - Negative: NP-2003 PV-1998
  - Traits: SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Chien Pa Li (=Pa Li) = PI 541987 (134.001) - Pyrus ussuriensis Maxim.
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: LA62-1983 M.micromalus-1995 N.Poiteau-1985 Pyronia-1987
  - Traits: VERY LATE RIPE, FIRE BLIGHT RESISTANT, PERRY POTENTIAL, DIPLOID (flow cytometry 2012)
• Chin Li = PI 541909 (1186.001) - Pyrus ussuriensis Maxim.
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1985 Pyronia-1988 V.Crab-1988
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• China = PI 133540 (1077.003) - Pyrus ussuriensis Maxim.
  - Virus Biological Assays - Negative: NP-1990 PV-1991
  - Traits: LATE RIPE, LOW CHILL, HEIRLOOM, DIPLOID (flow cytometry 2012), FIRE BLIGHT RESISTANT
• Chinese Fragrant Pear Seedling 3 = PI 665745 (2934.003) - Pyrus ×sinkiangensis T. T. Yu
  - Traits: CURATOR CHOICE, LATE RIPE, HIGH FRUIT QUALITY
• Chinese Fragrant Pear Seedling 5 = PI 665745 (2934.005) - Pyrus ×sinkiangensis T. T. Yu
• Chinfon Li = PI 654917 (2445.001) - Pyrus ussuriensis Maxim.
  - Virus Biological Assays - Negative: MM-1996 NP-1992 PV-1991
  - Traits: DIPLOID (flow cytometry 2012)
• Choju (=Ichiban Nashi tm) = PI 638012 (2820.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Asahi x Kitsukawasei
  - Traits: FIRE BLIGHT SUSCEPTIBLE, SCAB RESISTANT, EARLY RIPE, DIPLOID (flow cytometry)
• Chui Chi Li = PI 307544 (137.002) - Pyrus ussuriensis Maxim.
  - Virus Biological Assays - Negative: NP-2003 PV-1999
  - Traits: DIPLOID (flow cytometry 2012)
• Cincincis = PI 541707 (138.001) - Pyrus hybrid
  - Pedigree: P. pyrifolia x P. communis
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: LA62-1983 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Citron D'Ete = PI 131992 (1078.005) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Citron de Carmes (Madeleine) = PI 541163 (139.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2001 PV-2000
  - Traits: VERY EARLY RIPE, ANCIENT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Clapp Favorite = PI 502171 (1631.001) - Pyrus communis L.
  - Pedigree: Flemish Beauty x Bartlett
  - Virus Lab Assays - Negative: PBCVd-2000 PNRSV-1990
  - Virus Biological Assays - Negative: M.micromalus-1998 Pyronia-1988 V.Crab-1991, Uncertain: N.Poiteau-2003
  - Traits: FIRE BLIGHT SUSCEPTIBLE, MONOLINIA RESISTANT, DIPLOID (flow cytometry), HEIRLOOM
• Clara Frijs (Comtesse Clara Frijs) = PI 105193 (1079.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1988 M.micromalus-2002 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: QUINCE COMPATIBLE, DIPLOID (flow cytometry), COLD HARDY, HEIRLOOM
• Claude Blanchet = PI 541332 (1080.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1997 NP-1990 PV-1987 VC-1991
  - Traits: EARLY RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Cleveland Select (P. calleryana) = PI 617533 (2330.001) - Pyrus calleryana Decne.
  - Pedigree: Probably a selection from a street tree in Cleveland, OH
  - Virus Biological Assays - Negative: NP-1995 PV-1991
  - Traits: ORNAMENTAL, LOW CHILL
• Coadesele IDX (prob. is Ayers) = PI 506384 (1676.003) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: RED SKIN, ATTRACTIVE FRUIT, SCAB RESISTANT
• Colette = PI 617532 (2329.001) - Pyrus communis L.
  - Pedigree: Parentage unknown
  - Virus Lab Assays - Negative: PNRSV-1990
  - Virus Biological Assays - Negative: MM-2001 NP-1992 PV-1991
  - Traits: QUINCE COMPATIBLE, EVERBEARING - flowers through spring & summer, DIPLOID (flow cytometry 2012)
• Colmar d'Ete = PI 654920 (2449.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1996 NP-1992 PV-1991
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Colonel Marchand = PI 541361 (141.002) - Pyrus communis L.
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990
  - Traits: DIPLOID (flow cytometry 2012)
• Colonel Wilder = PI 541165 (142.005) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: VERY LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Coloree de Juillet = PI 264695 (143.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: FROST RESISTANT, VERY EARLY RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Columbia = PI 541166 (144.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Positive: Vein Yellows-1985
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Comte de Chambord = PI 212579 (149.003) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Comte de Lambertye = PI 541167 (150.002) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Beurre Superfin
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Comte de Lamy = PI 280031 (151.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1987 PV-1987 VC-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Comtesse Clara Frijs (=Clara Frijs) = PI 295085 (152.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Comtesse de Paris = PI 641282 (2724.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: PV-2002
• Concorde = PI 665740 (2533.001) - Pyrus communis L.
  - Pedigree: Conference x Doyenne du Comice
  - Virus Biological Assays - Negative: NP-1995 PV-1995
  - Traits: QUINCE COMPATIBLE, COLD HARDY (fruited in Anchorage), DIPLOID (flow cytometry 2012)
• Conference = PI 541168 (156.001) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Leon Leclerc de Laval
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1998 N.Poiteau-1990 P.Crassane-1984 Pyronia-1991 V.Crab-1991
  - Traits: QUINCE COMPATIBLE, DIPLOID (flow cytometry), apparently SELF-FERTILE (PARTHENOCARPIC), HEIRLOOM, DNA STANDARD
• Conseiller a la Coeur (3x) = PI 105425 (158.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: LATE RIPE, HEIRLOOM, POLYPLOID (3x flow cytometry 2012)
• Conseiller a la Coeur (3x) [Consigliere D'Appelle] = PI 105425 (1081.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1995 PV-1997
  - Traits: SCAB RESISTANT, POLYPLOID (3x flow cytometry 2007), HEIRLOOM
• Coscia = PI 292656 (159.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1989
  - Traits: DIPLOID (flow cytometry), HEIRLOOM
• Coscia (Precoce?) = PI 541459 (1646.001) - Pyrus communis L.
  - Pedigree: Precoce di Cassano x Coscia
  - Virus Biological Assays - Negative: N.Poiteau-1988 Pyronia-1989 V.Crab-1989
  - Traits: EARLY RIPE, DIPLOID (flow cytometry 2012)
• Coscia (Tardive?) = PI 541557 (2286.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1992 PV-1990
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Crna Poloska = PI 483401 (1551.002) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Biological Assays - Negative: MM-1999 NP-1990 PV-1993
  - Traits: VERY LATE RIPE, DIPLOID (flow cytometry 2012)
• Da Tou Huang [Ta Tau Huang] = PI 542002 (562.003) - Pyrus ussuriensis Maxim.
  - Pedigree: selection from Liaoning Province
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1990 PV-1991, Uncertain: VC-1989
  - Traits: FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry 2012)
• Dabney (3x) = PI 541306 (164.001) - Pyrus hybrid
  - Pedigree: Seckel x Garber
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-1988 P.Crassane-1984
  - Traits: FIRE BLIGHT RESISTANT, QUINCE COMPATIBLE , PHS Favorite 2005, POLYPLOID (3x flow cytometry 2012)
• Daisui Li = PI 657916 (2625.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Kikusui x Tsu Li
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-2003 PV-2001
  - Traits: DIPLOID (flow cytometry 2012)
• Dan Bae (Olympic) = PI 617678 (2623.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1999 NP-2001 PV-2001
  - Traits: SCAB RESISTANT, LATE RIPE
• Dana Hovey = PI 541169 (165.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: probably a seedling of Seckel possibly a hybrid of Seckel x Winter Nelis
  - Virus Biological Assays - Positive: Vein Yellows-1985, Negative: Bosc-1989
  - Traits: LATE RIPE, FIRE BLIGHT SUSCEPTIBLE, HEIRLOOM, CURATOR CHOICE, DIPLOID (flow cytometry 2012)
• Dardhe-e-kuge o.p. - Albania market = PI 641276 (2582.001) - Pyrus sp.
• Dardhe-e-kuge o.p. - Albania market = PI 641276 (2582.002) - Pyrus sp.
• Dardhe-e-kuge o.p. - Albania market = PI 641276 (2582.003) - Pyrus sp.
• Dardhe-e-kuge o.p. - Albania market = PI 641276 (2582.004) - Pyrus sp.
• Dardhe-e-kuge o.p. - Albania market = PI 641276 (2582.005) - Pyrus sp.
• Dave's Delight = PI 617564 (2393.001) - Pyrus communis L.
  - Pedigree: Beierschmidt x Bartlett
  - Virus Biological Assays - Negative: NP-1993 PV-1991
  - Traits: EARLY RIPE, DIPLOID (flow cytometry 2012)
• David = PI 657927 (2920.001) - Pyrus hybrid
  - Pedigree: Pyrus ussuriensis x Bartlett
  - Virus Biological Assays - Negative: NP-2009, Uncertain: PV-2009
  - Traits: COLD HARDY, DIPLOID (flow cytometry 2012)
• Dawn = PI 541170 (168.001) - Pyrus communis L.
  - Pedigree: Michigan 437 (Barseck x Bartlett) x Comice
  - Virus Lab Assays - Negative: ASGV-1989 PBCVd-2000 TOMRSV-1986
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1996 P.Crassane-1984 Pyronia-1985 V.Crab-1989, Uncertain: N.Poiteau-2003
  - Traits: QUINCE COMPATIBLE, DIPLOID (flow cytometry)
• De Su Duca = PI 654933 (2689.002) - Pyrus communis L.
  - Traits: DIPLOID (flow cytometry 2012)
• Delices d'Avril = PI 541171 (169.002) - Pyrus communis L.
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: VERY LATE RIPE, SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Dessertnaia = PI 277420 (170.001) - Pyrus hybrid
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: N.Poiteau-1993 P.Crassane-1984 Pyronia-1993, Uncertain: V.Crab-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Devoe = PI 541172 (173.001) - Pyrus communis L.
  - Pedigree: Probably a seedling of cultivar Clapp Favorite
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986
  - Virus Biological Assays - Negative: M.micromalus-1996 Pyronia-1997, Uncertain: Bosc-1989 N.Poiteau-2003
  - Traits: FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, DIPLOID (flow cytometry), CURATOR CHOICE
• Directeur Hardy = PI 617503 (174.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1989 PV-1987 VC-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Dixie = PI 541708 (175.002) - Pyrus hybrid
  - Pedigree: Le Conte x P. pyrifolia
  - Virus Biological Assays - Negative: PV-2000
  - Traits: FIRE BLIGHT RESISTANT, LOW CHILL, DIPLOID (flow cytometry 2012)
• Djebel Goutava = PI 324121 (176.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: LA62-1983 M.micromalus-1999 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Docteur Desportes = PI 541173 (177.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: LATE RIPE, QUINCE COMPATIBLE, DIPLOID (flow cytometry 2012)
• Docteur Jules Guyot (=Limonera) = PI 541178 (192.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Positive: N.Poiteau-1985
  - Traits: DIPLOID (flow cytometry), SCAB RESISTANT (Australia), HEIRLOOM, EARLY RIPE
• Doina = PI 617544 (2352.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1999 NP-1992 PV-1991
  - Traits: DIPLOID (flow cytometry 2012)
• Doitsu = PI 228012 (178.002) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: MM-1998 NP-1995 PV-1995
  - Traits: HEIRLOOM, SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Domestic Pear = PI 541437 (1489.001) - Pyrus communis L.
  - Pedigree: Seedling selection from European seedlot
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
• Domestic Pear "French Type" = PI 541441 (700.001) - Pyrus communis L.
  - Pedigree: Prosser received from source in Washington as 'French type seedling'
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1984
  - Traits: DIPLOID (flow cytometry 2014)
• Domestic Pear (OSU Seedling A) = PI 541449 (1584.001) - Pyrus communis L.
  - Pedigree: Seedling selection A
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987
  - Traits: ROOTSTOCK, POLYPLOID (3x flow cytometry 2013)
• Domestic Pear (OSU Seedling B) - looks like Bosc = PI 541450 (1585.001) - Pyrus communis L.
  - Pedigree: Seedling selection B
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987
  - Traits: MID-LATE RIPE, ROOTSTOCK
• Domestic Pear (OSU Seedling C) = PI 541451 (1586.001) - Pyrus communis L.
  - Pedigree: Seedling selection C
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987
  - Traits: ROOTSTOCK
• Domestic pear - Ontario Selection = PI 430890 (1402.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1985
  - Traits: DIPLOID (flow cytometry 2012)
• Domestic pear hybrid from Orel, Russia = PI 654956 (2778.001) - Pyrus hybrid
  - Traits: DIPLOID (flow cytometry 2012)
• Doree de Bourgogne = PI 541516 (2124.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: N.Poiteau-1989 Vein Yellows-1985, Negative: V.Crab-1989
  - Traits: LATE RIPE
• Doree de Bourgogne = PI 541516 (2124.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1996 NP-1995 PV-1995
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• Douglas = PI 541723 (1083.001) - Pyrus hybrid
  - Pedigree: Kieffer x Duchess d'Angouleme (probably)
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1985 Pyronia-1988
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry 2012)
• Doyenne Boussock (3x) = PI 295088 (180.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: MM-1995 NP-1990 PV-1987 VC-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE, HEIRLOOM, POLYPLOID (3x flow cytometry 2012)
• Doyenne Flon Aine = PI 255610 (189.003) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Doyenne Goubault = PI 541176 (190.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1990 PV-1986 VC-1989
  - Traits: VERY LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Doyenne Gris = PI 541335 (1086.002) - Pyrus communis L.
  - Pedigree: White Doyenne russet sport
  - Virus Lab Assays - Negative: PNRSV-1990
  - Virus Biological Assays - Negative: NP-1990 PV-1995
  - Traits: SCAB RESISTANT, QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Doyenne Madame Levavasseur (3x) = PI 541177 (191.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987 VC-1989
  - Traits: VERY LATE RIPE, POLYPLOID (3x flow cytometry 2012)
• Doyenne Perault = PI 541552 (2281.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1991 PV-1990
  - Traits: VERY LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Doyenne d'Alecon = PI 295089 (181.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Positive: M.micromalus-1999 Pyronia-1999
  - Traits: VERY LATE RIPE, ANCIENT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Doyenne d'Hiver (Beurré Easter) = PI 541307 (183.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-1985 Pyronia-1985 V.Crab-1989
  - Traits: VERY LATE RIPE (WINTER PEAR), FROST RESISTANT, QUINCE COMPATIBLE, HEIRLOOM, MONOLINIA RESISTANT, DIPLOID (flow cytometry 2012)
• Doyenne de Juillet = PI 260197 (184.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1986 VC-1989
  - Traits: VERY EARLY RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Doyenne de Saumur = PI 541362 (186.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1991 PV-1992
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Doyenne du Comice = PI 271658 (148.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: Bosc-1989 LA62-1983 M.micromalus-1995 N.Poiteau-1985 Pyronia-1985 V.Crab-1989
  - Traits: LATE RIPE, FIRE BLIGHT SUSCEPTIBLE, FROST RESISTANT, QUINCE COMPATIBLE, DIPLOID (flow cytometry), HEIRLOOM, CURATOR CHOICE, DNA STANDARD
• Doyenne du Comice - Crimson Gem = PI 541535 (2198.003) - Pyrus communis L.
  - Pedigree: Dark red sport of Regal Red
  - Virus Biological Assays - Negative: MM-1996 NP-1993 PV-1995
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, QUINCE COMPATIBLE, DIPLOID (flow cytometry 2012)
• Doyenne du Comice - Regal Red = PI 541534 (2150.004) - Pyrus communis L.
  - Pedigree: Red sport of Comice
  - Virus Biological Assays - Negative: NP-1991 PV-1991, Uncertain: MM-1998
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, QUINCE COMPATIBLE, DIPLOID (flow cytometry 2012)
• Doyenne du Comice - Spur = PI 352632 (146.002) - Pyrus communis L.
  - Pedigree: Spur or bud mutation of cultivar Comice
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: MM-1999 NP-1990 PV-1995 VC-1992
  - Traits: FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, DIPLOID (flow cytometry 2012)
• Duchesse Bererd = PI 541514 (2122.005) - Pyrus communis L.
  - Pedigree: seedling of 'Duchesse Bronzee'
  - Virus Biological Assays - Negative: PV-2000
  - Traits: DIPLOID (flow cytometry 2012)
• Duchesse Bronzee = PI 541179 (193.004) - Pyrus communis L.
  - Pedigree: Duchesse d'Angouleme sport
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Duchesse d'Angouleme = PI 541303 (17.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1989 P.Crassane-1984 Pyronia-1985 V.Crab-1985, Uncertain: Bosc-1988
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, QUINCE COMPATIBLE, DIPLOID (flow cytometry), HEIRLOOM, MONOLINIA RESISTANT
• Duchesse d'Angouleme Bronzee = PI 541336 (1087.002) - Pyrus communis L.
  - Pedigree: Duchesse d'Angouleme sport
  - Virus Biological Assays - Negative: MM-2001 NP-1990 PV-1989
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Duchesse de Berry d'Ete = PI 541180 (196.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Duchesse de Bordeaux (= Beurré Perrault) = PI 279330 (197.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: VERY LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Duchesse de Brissac = PI 541181 (199.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Negative: Bosc-1987 LA62-1983 M.micromalus-1997 N.Poiteau-1987 P.Crassane-1984 Pyronia-1988 V.Crab-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Duchesse de Mouchy = PI 541182 (200.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Negative: Bosc-1989 LA62-1983 N.Poiteau-1985 Pyronia-1985 V.Crab-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Dunn Adobe Pear (=Beurre Easter) = PI 617684 (2712.003) - Pyrus communis L.
  - Pedigree: Pyrus communis planted about 1840 and still growing (March 2000) at Dunn Adobe, California.
  - Virus Biological Assays - Negative: NP-2003
  - Traits: DIPLOID (flow cytometry 2012)
• Earlibrite = PI 617563 (2392.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1995 PV-1991
  - Traits: VERY EARLY RIPE, DIPLOID (flow cytometry 2012)
• Early Green Sugar = PI 541337 (1088.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2003 PV-2000
  - Traits: DIPLOID (flow cytometry 2012)
• Early Harvest (=Chambers) = PI 541183 (202.003) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1995 PV-1986 VC-1989
  - Traits: FIRE BLIGHT RESISTANT, EARLY RIPE, DIPLOID (flow cytometry), HEIRLOOM
• Early Seckel = PI 541184 (204.001) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Seckel
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1986
  - Virus Biological Assays - Negative: JA-1983 M.micromalus-1996 N.Poiteau-1985 Pyronia-1988 V.Crab-1992, Uncertain: Bosc-1989
  - Traits: QUINCE COMPATIBLE, DIPLOID (flow cytometry 2012)
• Ecmianka = PI 392319 (205.002) - Pyrus communis L.
  - Pedigree: Parentage unknown.
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: VERY EARLY RIPE, DIPLOID (flow cytometry 2012)
• Edmundka = PI 502170 (1630.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1988
  - Traits: DIPLOID (flow cytometry 2012)
• El Dorado = PI 541388 (1168.001) - Pyrus communis L.
  - Pedigree: Probably seedling of cultivar Bartlett
  - Virus Biological Assays - Negative: LA62-1983 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry 2012)
• Eletta Morettini = PI 311714 (206.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Butirra Hardy x Passe Crassane
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Positive: N.Poiteau-2004, Negative: Bosc-1989 JA-1983 M.micromalus-1996 P.Crassane-1984
  - Traits: VERY LATE RIPE, DIPLOID (flow cytometry 2012)
• Elliot = PI 657915 (2624.001) - Pyrus communis L.
  - Pedigree: Elliot No. 4 x Vermont Beauty
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1999 PV-2001
  - Traits: DIPLOID (flow cytometry 2012)
• Emancipation = PI 617668 (2613.001) - Pyrus hybrid - VIRUS INFECTED
  - Pedigree: Probably a chance seedling
  - Virus Biological Assays - Positive: NP-2002 PV-2002, Uncertain: RING-1999 VY-1999
  - Traits: DIPLOID (flow cytometry 2012)
• Emile d'Heyst = PI 131460 (1089.002) - Pyrus communis L.
  - Pedigree: Probably a seedling selection
  - Virus Biological Assays - Negative: NP-1990 PV-1995
  - Traits: LATE RIPE, QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Endicott Pear = PI 637990 (2595.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1998 PV-1998
  - Traits: HERITAGE
• Enie = PI 617571 (2454.001) - Pyrus communis L.
  - Pedigree: Zuckerbirne x Clapp Favorite
  - Virus Biological Assays - Negative: NP-1992 PV-1993
  - Traits: COLD HARDY, DIPLOID (flow cytometry 2012)
• Epargne (= English Jargonelle) (3x) = PI 279334 (209.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: ANCIENT, HEIRLOOM, POLYPLOID (3x flow cytometry 2012)
• Epine de Mai = PI 290783 (210.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: LATE RIPE, HEIRLOOM
• Erabasma (3x) (=Jeribasma?) = PI 483370 (1524.002) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1989 PV-1990
  - Traits: PSYLLA RESISTANT, POLYPLOID (3x flow cytometry 2007)
• Erwin's Delight = PI 617651 (2592.001) - Pyrus communis L.
  - Pedigree: Selection of Pyrus communis
  - Virus Biological Assays - Negative: NP-1999 PV-1999
• Estella = PI 541709 (216.002) - Pyrus hybrid
  - Pedigree: Kieffer x P. communis
  - Virus Biological Assays - Negative: NP-1990 PV-1990
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• Etrusca = PI 665800 (2693.003) - Pyrus communis L.
  - Pedigree: Coscia x Gentile
  - Traits: VERY EARLY RIPE, QUINCE COMPATIBLE
• Eureka = PI 541710 (217.004) - Pyrus hybrid
  - Pedigree: Seckel x Kieffer
  - Virus Biological Assays - Negative: NP-1995 PV-1995
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT
• Eva Baltet = PI 541186 (218.003) - Pyrus communis L.
  - Pedigree: Bartlett x Flemish Beauty
  - Virus Biological Assays - Negative: NP-1990 PV-1987
• Ewart = PI 541187 (219.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1990 PV-1987
• Ewart (rec. as 4x - not 4x) = PI 541445 (1090.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: POLYPLOID? DIPLOID (flow cytometry 2012)
• F.12-184 (P-2430) = PI 541460 (2142.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1990 PV-1991
  - Traits: ROOTSTOCK, ANEUPLOID (flow cytometry 2013,2014)
• Fame = PI 617534 (2331.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1993 PV-1991, Uncertain: MM-2001
• Fan-Stil = PI 617658 (2603.001) - Pyrus hybrid - VIRUS INFECTED
  - Pedigree: Unknown - possibly selection from Mexico
  - Virus Biological Assays - Positive: VY-1999, Negative: PV-2002
  - Traits: LOW CHILL
• Farmingdale = PI 541188 (221.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1988
  - Virus Biological Assays - Negative: JA-1983 M.micromalus-1996 N.Poiteau-2003 P.Crassane-1984 Pyronia-1985 V.Crab-1991
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry)
• Favorite Morel = PI 255611 (222.003) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Bartlett
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: LATE RIPE, HEIRLOOM
• Fedorovski = PI 617628 (2557.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-1999 PV-1997
• Fertility (not 4x) = PI 541309 (224.001) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Beurre Goubault
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: Bosc-1988 JA-1983 M.micromalus-1997 N.Poiteau-1985 Pyronia-1985 V.Crab-1989
  - Traits: FROST RESISTANT, HEIRLOOM, POLYPLOID? DIPLOID (flow cytometry 2012), SELF FERTILE, Graft-compatible and possibly cross-compatible with apple
• Figue d'Alencon = PI 541539 (2253.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: PV-1989 VY-1991
  - Traits: QUINCE COMPATIBLE, HEIRLOOM
• Figue d'Alencon = PI 541539 (2253.006) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1996 PV-1995
  - Traits: QUINCE COMPATIBLE, HEIRLOOM
• Fin de Siecle = PI 541510 (2118.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: N.Poiteau-1992 Pyronia-1989 Vein Yellows-1992
• Fiorenza = PI 541555 (2284.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PNRSV-1990
  - Virus Biological Assays - Negative: NP-1990 PV-1991
• Flemish Beauty = PI 541189 (225.003) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: TOMRSV-1988, Uncertain: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2003 NP-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE, COLD HARDY, MILDEW RESISTANT, QUINCE COMPATIBLE, DIPLOID (flow cytometry), HEIRLOOM
• Florida 11-25 = PI 541338 (1092.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: LOW CHILL
• Florida 58-45 = PI 617666 (2611.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Biological Assays - Positive: PV-2000
  - Traits: LOW CHILL
• Fondante de Charneu = PI 231889 (230.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1988
  - Virus Biological Assays - Positive: N.Poiteau-1993 Pyronia-1993 Vein Yellows-1985, Negative: Bosc-1989 V.Crab-1988
  - Traits: HEIRLOOM
• Fondante de Moulins Lille = PI 541190 (231.002) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Napoleon
  - Virus Biological Assays - Negative: NP-1989
  - Traits: QUINCE COMPATIBLE, HEIRLOOM
• Forelle = PI 541191 (233.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1988
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1996 N.Poiteau-2003 Pyronia-1985 V.Crab-1992
  - Traits: LATE RIPE, FIRE BLIGHT SUSCEPTIBLE, DIPLOID (flow cytometry), HEIRLOOM
• Forostovsky = PI 143977 (234.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1992 PV-1992
• Fox = PI 541500 (2104.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: from seed of Belle Lucrative
  - Virus Biological Assays - Positive: N.Poiteau-1988 Vein Yellows-1985
  - Traits: HEIRLOOM
• Fragrante = PI 324127 (235.002) - Pyrus communis L.
  - Pedigree: Berg. Esperen x Passe Crassane (mag. pollen)
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: VERY LATE RIPE
• Frangipane = PI 541554 (2283.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1991 PV-1991, Uncertain: MM-2001
  - Traits: LATE BLOOM, HEIRLOOM
• Frederick Clapp = PI 541192 (236.002) - Pyrus communis L.
  - Pedigree: Urbaniste x Beurre Superfin
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: NP-1990
  - Traits: LATE RIPE, HEIRLOOM
• French Resistant - rootstock clone = PI 617535 (2334.001) - Pyrus communis ssp. pyraster (L.) Ehrh. - VIRUS INFECTED
  - Pedigree: Seedling selection
  - Virus Biological Assays - Positive: NP-1993 PV-1993 VY-1985
  - Traits: ROOTSTOCK
• French Resistant No. 1 - rootstock clone = PI 541193 (237.001) - Pyrus communis ssp. pyraster (L.) Ehrh. - VIRUS INFECTED
  - Pedigree: Seedling selection
  - Virus Biological Assays - Positive: N.Poiteau-1989, Negative: P.Crassane-1984, Uncertain: V.Crab-1988
  - Traits: LATE RIPE, ROOTSTOCK
• Fu-Wu-Shian = PI 654944 (2756.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: NP-2003
• Gansel's Bergamot = PI 280033 (238.003) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Autumn Bergamot
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: HEIRLOOM
• Garber = PI 541711 (239.002) - Pyrus hybrid
  - Pedigree: P. pyrifolia hybrid
  - Virus Biological Assays - Negative: NP-1990 PV-1990
  - Traits: VERY LATE RIPE, FIRE BLIGHT RESISTANT, LOW CHILL, HEIRLOOM
• Garber Seedling = PI 112064 (2368.001) - Pyrus hybrid
  - Pedigree: Seedling selection from cultivar Garber
  - Virus Biological Assays - Negative: NP-1992 PV-1991
• Gaspard (=Summercrisp) = PI 617556 (2373.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-2001 NP-1992 PV-1991
  - Traits: COLD HARDY
• Gelbmostler (3x) = PI 483365 (1519.002) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Biological Assays - Negative: NP-1990 PV-1987, Uncertain: MM-2001
  - Traits: PERRY, SCAB RESISTANT, POLYPLOID (3x flow cytometry 2013)
• General Galliene = PI 541194 (240.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: VERY LATE RIPE
• General Le Clerc = PI 260157 (241.003) - Pyrus communis L.
  - Pedigree: Unknown, probably Comice seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1990 PV-1987 VC-1989
  - Traits: QUINCE COMPATIBLE, DIPLOID (flow cytometry)
• General Tottleben = PI 541544 (2270.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: HEIRLOOM
• Gha = PI 665792 (2872.001) - Pyrus sp.
  - Traits: POLYPLOID (3x flow cytometry 2013)
• Gieser Wildeman = PI 264194 (244.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: VERY LATE RIPE
• Gin = PI 541195 (246.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1988
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1996 N.Poiteau-1992 P.Crassane-1984 Pyronia-1987 V.Crab-1991
  - Traits: PERRY, MEDIUM SHARP (MEDIUM ACID, MEDIUM TANNIN), DIPLOID (flow cytometry)
• Gliva Ukrainskaya / Wilenska Plenna = PI 312497 (248.003) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1997 NP-1990 PV-1989
  - Traits: DIPLOID (flow cytometry)
• Glou Morceau = PI 541310 (249.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: Pyronia-1988, Uncertain: M.micromalus-2001
  - Traits: VERY LATE RIPE, QUINCE COMPATIBLE, HEIRLOOM
• Golden Spice = PI 541547 (2273.001) - Pyrus communis L.
  - Pedigree: Parentage unknown
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1990 PV-1991
  - Traits: COLD HARDY, DIPLOID (flow cytometry)
• Gompapa = PI 654927 (2655.002) - Pyrus communis (hybrid?)
  - Traits: LARGE FRUIT, GOOD KEEPER
• Good Christian = PI 541712 (250.003) - Pyrus hybrid
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1990 PV-1991 VC-1989
  - Traits: LATE RIPE, LOW CHILL, FIRE BLIGHT RESISTANT
• Gorham = PI 541196 (252.001) - Pyrus communis L.
  - Pedigree: Bartlett x Josephine de Malines
  - Virus Lab Assays - Negative: PBCVd-2000 TOMRSV-1988
  - Virus Biological Assays - Negative: M.micromalus-1999 N.Poiteau-1987 P.Crassane-1984 Pyronia-1987
  - Traits: FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, DIPLOID (flow cytometry)
• Gourmet = PI 541804 (1661.001) - Pyrus hybrid
  - Pedigree: South Dakota F15 x Ewart
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987
  - Traits: DIPLOID (flow cytometry), COLD HARDY
• Grand Champion (Gorham sport) = PI 541197 (253.003) - Pyrus communis L.
  - Pedigree: Russet sport of Gorham
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1990 PV-1995
  - Traits: QUINCE COMPATIBLE, DIPLOID (flow cytometry)
• Grant St. Yellow (P. calleryana) = PI 541107 (2188.001) - Pyrus calleryana Decne.
  - Pedigree: P. calleryana sdlg.selected on Grant St. by M.N. Westwood
  - Virus Biological Assays - Negative: MM-1997 NP-1989 PV-1989
  - Traits: ORNAMENTAL, LOW CHILL, DIPLOID (flow cytometry 2014)
• Grata = PI 324128 (254.002) - Pyrus communis L.
  - Pedigree: Butirra Clairgeau x Williams (magnetic pollen)
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
• Green Horse = PI 665811 (2806.001) - Pyrus communis L.
  - Traits: PERRY, MEDIUM SHARP (HIGH ACID, MEDIUM TANNIN)
• Greisa No.1 (=Douglas?) = PI 541713 (255.001) - Pyrus hybrid
  - Pedigree: P. pyrifolia hybrid
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: JA-1983 N.Poiteau-1985
  - Traits: FIRE BLIGHT RESISTANT
• Grev Moltke (3x) [Graf Moltke] (=Count A.W. Moltke) = PI 541199 (258.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: Bosc-1988 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: FROST RESISTANT, HEIRLOOM, POLYPLOID (3x flow cytometry 2012)
• Gros Blanquet = Q 25958 (2739.001) - Pyrus communis L.
  - Virus Biological Assays - Uncertain: NP-2004 PV-2003
  - Traits: POLYPLOID (3x flow cytometry 2013)
• Grumkower Butter Birne = PI 312498 (2358.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1999 NP-1992 PV-1991
  - Traits: LATE RIPE
• Grusha ot Nagorskiego [Grusza od ...] = PI 483371 (1525.005) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Biological Assays - Negative: MM-1997 NP-1990 PV-1991
• Gråpäron (3x) (Grey Pear) = PI 104833 (1093.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: P.Crassane-1984, Negative: Bosc-1989
  - Traits: SCAB RESISTANT, POLYPLOID (3x flow cytometry 2013)
• Guar Li Sdlg No. 2 = PI 541988 (259.003) - Pyrus ussuriensis Maxim.
  - Pedigree: Seedling of cultivar Guar Li grown from seed collected in China by F.C. Reimer in 1917
  - Virus Biological Assays - Negative: NP-2002 PV-2001
• Guenette (=Green Chisel) = PI 277525 (260.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: Pyronia-1987 V.Crab-1988
  - Traits: ANCIENT, EARLY RIPE, HEIRLOOM
• H 6831/1.12 (=HW 605?) = PI 541200 (261.001) - Pyrus communis L.
  - Pedigree: Seckel x Bartlett second test selection Seckel x NJ6
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: JA-1983 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: FIRE BLIGHT RESISTANT
• H.E.S. 25021 (Harrow Experiment Station) = PI 541201 (262.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: JA-1983 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1988, Uncertain: Bosc-1989
• HN-36 P. pyrifolia (Virus Indicator) = PI 358953 (886.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Seedling of cultivar Nijusseki
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1985
  - Traits: VIRUS INDICATOR, SCAB RESISTANT, ANEUPLOID (flow cytometry 2013), DIPLOID (flow cytometry 2014)
• HN-39 P. pyrifolia (Virus Indicator) = PI 358954 (887.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Seedling of cultivar Nijusseiki
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1985 Pyronia-1990
  - Traits: VIRUS INDICATOR
• HW 600 (Harrow, Ontario) = PI 541339 (1096.001) - Pyrus communis L.
  - Pedigree: Bartlett x US 386
  - Virus Biological Assays - Negative: N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: FIRE BLIGHT RESISTANT
• HW 601 (Harrow, Ontario) = PI 541202 (264.002) - Pyrus communis L.
  - Pedigree: Bartlett x Maxine second test selection
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: FIRE BLIGHT RESISTANT
• Hager Grove Pioneer Pear (=Dearborn?) = PI 617686 (2714.002) - Pyrus communis L.
  - Traits: HERITAGE
• Hakko = PI 654943 (2754.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: PV-2003
• Hall 20 = PI 617551 (2365.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2001 PV-2001
• Hang Pa Li = PI 315064 (268.001) - Pyrus ussuriensis Maxim.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1998 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: MILDEW RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry)
• Hansen Siberian Pear = PI 542004 (1095.001) - Pyrus ussuriensis Maxim.
  - Pedigree: Probably a seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: N.Poiteau-1989 Pyronia-1988, Uncertain: Bosc-1989 M.micromalus-2003
  - Traits: COLD HARDY, MILDEW RESISTANT, LOW CHILL, EARLY BLOOM, DIPLOID (flow cytometry), FIRE BLIGHT RESISTANT
• Harbin (P. ussuriensis) = PI 542019 (1318.001) - Pyrus ussuriensis Maxim.
  - Pedigree: Selection of seed-propagated variety from China
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-2003 N.Poiteau-1988 P.Crassane-1984 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, COLD HARDY, MILDEW RESISTANT, DIPLOID (flow cytometry)
• Harrow Delight (HW 603) = PI 541431 (1404.001) - Pyrus communis L.
  - Pedigree: Bartlett x (Early Sweet x Old Home)
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1987 P.Crassane-1985 Pyronia-1990
  - Traits: FIRE BLIGHT RESISTANT, QUINCE COMPATIBLE, COLD HARDY (fruited in Anchorage)
• Harvest Queen (HW 602) = PI 541203 (265.001) - Pyrus communis L.
  - Pedigree: Bartlett x (Barseck x Bartlett)
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: Bosc-1989 JA-1983 N.Poiteau-1985 Pyronia-1987 V.Crab-1988
  - Traits: QUINCE COMPATIBLE
• Harvest Queen (HW 602) = PI 541203 (1097.001) - Pyrus communis L.
  - Pedigree: Bartlett x (Barseck x Bartlett)
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: QUINCE COMPATIBLE
• Hau Kai = PI 541989 (269.003) - Pyrus ussuriensis Maxim.
  - Pedigree: very old cultivar from Liaoning (northeast) China
  - Virus Biological Assays - Negative: NP-1993 PV-1993
  - Traits: SCAB RESISTANT
• Hawaii = PI 541897 (270.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, SCAB RESISTANT, HEIRLOOM
• Hawaii x Japanese Golden Russet = PI 541765 (1231.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Hawaii x Jap. Gold. Russet
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1987
  - Traits: ROOTSTOCK, SCAB RESISTANT
• Hawaii x Japanese Golden Russet = PI 541766 (1232.002) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Hawaii x Jap. Gold. Russet
  - Virus Biological Assays - Negative: MM-1996 NP-1992 PV-1992
  - Traits: ROOTSTOCK, SCAB RESISTANT
• Hebe = PI 255612 (271.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: JA-1983 Vein Yellows-1985, Negative: Bosc-1988 V.Crab-1988
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2014)
• Hebe = PI 255612 (271.008) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: VERY LATE RIPE, HEIRLOOM
• Helmer = PI 617591 (2515.001) - Pyrus sp. - VIRUS INFECTED
  - Pedigree: Clone from a pear growing wild in northern Idaho
  - Virus Biological Assays - Positive: NP-1997 PV-1997
  - Traits: COLD HARDY, apparently SELF-FERTILE
• Helmershus Roda (= Forelle) = PI 295090 (274.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1997 Pyronia-1985
  - Traits: LATE RIPE
• Henderson = PI 617664 (2609.001) - Pyrus pyrifolia (Burm. f.) Nakai - VIRUS INFECTED
  - Virus Biological Assays - Positive: PV-2001, Uncertain: ASGV-1999
  - Traits: LOW CHILL
• Hendre Huffcap = PI 541205 (276.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: JA-1983 M.micromalus-1997 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1989
  - Traits: PERRY, SWEET, LOW ACID, LOW TANNIN
• Henri Desportes = PI 541206 (277.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: HEIRLOOM
• Hermit = PI 617565 (2395.001) - Pyrus communis hybrid
  - Virus Biological Assays - Negative: NP-1992 PV-1991
  - Traits: VERY LATE RIPE, BLISTER MITE RESISTANT
• Hessle = PI 541485 (2028.003) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: MM-1998
  - Traits: HEIRLOOM, LATE RIPE, FIRE BLIGHT RESISTANT
• Higdon = PI 617657 (2602.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Biological Assays - Positive: PV-2002
  - Traits: LOW CHILL, FIRE BLIGHT RESISTANT
• Highland = PI 541207 (279.002) - Pyrus communis L.
  - Pedigree: Bartlett x Comice
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1990 PV-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, DIPLOID (flow cytometry)
• Ho Mon = Q 27965 (2723.001) - Pyrus ×sinkiangensis T. T. Yu
  - Pedigree: Landrace fragrant pear
  - Virus Biological Assays - Negative: NP-2003 PV-2002
  - Traits: FRAGRANT PEAR
• Hofrath's Birne = PI 541204 (267.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: LATE RIPE, SCAB RESISTANT, MONOLINIA RESISTANT, POLYPLOID (3x flow cytometry 2013)
• Homony = PI 105514 (1098.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-2001 NP-1989 PV-1995
  - Traits: VERY LATE RIPE, VERY LARGE FRUIT, POLYPLOID (3x flow cytometry 2013)
• Honey Dew = PI 617660 (2605.004) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-2003
• Honeysweet = PI 541320 (280.001) - Pyrus communis L.
  - Pedigree: Seckel x US 220 (Vermont Beauty x Roi Charles De Wurtemburg)
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1988 P.Crassane-1985
  - Traits: FIRE BLIGHT RESISTANT, COLD HARDY
• Hong Yiungli = Q 27966 (2764.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Uncertain: NP-2003
  - Traits: Larger than Korla Xiong Li
• Hood = PI 541311 (281.001) - Pyrus hybrid
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1989 P.Crassane-1984 Pyronia-1985 V.Crab-1991
  - Traits: FIRE BLIGHT RESISTANT, LOW CHILL 260 hrs, DIPLOID (flow cytometry), apparently SELF-FERTILE, SCAB RESISTANT (Australia)
• Hortellet = PI 206610 (282.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1995 PV-1995
• Hoskins = PI 541208 (284.001) - Pyrus communis L.
  - Pedigree: Seckel x Late Faulkner
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1996 N.Poiteau-1985 Pyronia-1985
  - Traits: VERY LATE RIPE, FIRE BLIGHT RESISTANT
• Hosui = PI 541931 (2149.002) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: (Kikusi x Yakumo) x Yakumo
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1990 PV-1991, Uncertain: MM-2000
  - Traits: FIRE BLIGHT SUSCEPTIBLE, BLACK SPOT RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry), CURATOR CHOICE, DNA Standard
• Hourdequin = PI 541209 (285.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1993 PV-1993
  - Traits: LATE RIPE
• Howell - Sport = PI 541210 (286.004) - Pyrus communis L.
  - Pedigree: Howell is a seedling of local cultivar Jonah. Howell - Sport is a red skin bud mutation, origin uncertain
  - Virus Biological Assays - Negative: MM-1998 NP-1995 PV-1995
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, QUINCE COMPATIBLE, HEIRLOOM
• Hua Gua (Hua-Gai) = PI 665779 (2637.002) - Pyrus pyrifolia (Burm. f.) Nakai
• Huagai Li [Hua Kai] = PI 307545 (287.001) - Pyrus ussuriensis Maxim. - VIRUS INFECTED
  - Pedigree: very old cultivar from Liaoning (northeast) China
  - Virus Biological Assays - Positive: P.Crassane-1983 Vein Yellows-1985, Negative: V.Crab-1988, Uncertain: Bosc-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE, SCAB RESISTANT
• Huangxianshui Li [Huang Hsing Sui Li] = PI 541990 (288.002) - Pyrus ussuriensis Maxim.
  - Pedigree: old selection from Shandong Province complex hybrid of ussuriensis (x bretschneideri)
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: FIRE BLIGHT RESISTANT, SCAB RESISTANT
• Hudar = PI 541477 (2295.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-2001 NP-1991 PV-1991
  - Traits: COLD HARDY, EARLY RIPE
• Huhoot Li = PI 541966 (2255.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: NP-1990 PV-1991
  - Traits: LATE RIPE, SCAB RESISTANT
• Hung Li = PI 541993 (291.001) - Pyrus ussuriensis Maxim. - VIRUS INFECTED
  - Pedigree: P. ussuriensis x P. phaeocarpa complex hybrid of ussuriensis (x bretschneideri)
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Positive: P.Crassane-1983 Vein Yellows-1985, Negative: Bosc-1987 Pyronia-2002, Uncertain: M.micromalus-2003
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry)
• Huyshe's Victoria = PI 280034 (292.001) - Pyrus communis L.
  - Pedigree: Marie Louise x Gansel's Bergamot
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Crab-1989
  - Traits: HEIRLOOM
• Hyrs-Dere 84-1 = PI 665804 (2822.001) - Pyrus sp.
  - Virus Biological Assays - Negative: NP-2004
• I-5 Milepost 238 = PI 617685 (2713.001) - Pyrus communis L.
  - Pedigree: Collected from roadside in Oregon.
  - Virus Biological Assays - Negative: PV-2002
  - Traits: LATE RIPE
• IP-1100 = PI 324130 (711.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1985
• IV 12 = PI 617608 (2534.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1997 PV-1997
• Idaho = PI 541507 (2113.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1992 PV-1992
  - Traits: FIRE BLIGHT SUSCEPTIBLE
• Ilinjaca = PI 665774 (2860.001) - Pyrus communis L.
  - Traits: PSYLLA RESISTANT
• Ilinka = PI 483372 (1526.002) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: COLD HARDY, HEIRLOOM
• Illinois 80E-1 (Illinois selection from Russian seed) = PI 617607 (2532.001) - Pyrus communis L.
  - Pedigree: Seedling selection - seed from Russia
  - Virus Biological Assays - Negative: MM-1997 NP-1999 PV-1997
  - Traits: COLD HARDY, FIRE BLIGHT RESISTANT, WIDE BRANCH ANGLES, FROST RESISTANT FLOWERS
• Imamura Aki = PI 352641 (294.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Crab-1988
  - Traits: LATE RIPE, BLACK SPOT RESISTANT, SCAB RESISTANT
• India IC 22040 = Q 43103 (2985.001) - Pyrus sp.
• India NIC 20814 = PI 665807 (2748.001) - Pyrus pashia hybrid
  - Virus Biological Assays - Negative: PV-2003
  - Traits: NOT COLD HARDY
• India pear selection = PI 665806 (2742.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: PV-2003
• Ishiiwase = PI 228013 (296.002) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Nijisseiki x Doitsu
  - Virus Biological Assays - Uncertain: NP-2004
• Itala Pirovano = PI 279336 (298.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1990
• Iwate No. 1 = PI 506368 (1577.001) - Pyrus hondoensis Kikuchi & Nakai
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987
  - Traits: SCAB RESISTANT, P. pyrifolia not hondoensis
• Jakobowka Hanowerska = PI 131045 (1102.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: EARLY RIPE
• Jakubka Ceska = PI 282971 (299.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: P.Crassane-1984 Pyronia-1984, Negative: Bosc-1989 V.Crab-1988
  - Traits: POLYPLOID (3x flow cytometry 2013)
• Jalovcovka = PI 307541 (301.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1996 NP-1990 PV-1989 VC-1989
• Jalovcovka = PI 312500 (302.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1989 VC-1989
  - Traits: SCAB RESISTANT
• Japanese Golden Russet = PI 541898 (303.003) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: NP-1995 PV-1996, Uncertain: MM-1996
  - Traits: SCAB RESISTANT
• Japanese Golden Russet x Mikado (Decline Resist.) = PI 541762 (1228.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Jap. Gold. Russet x Mikado
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Negative: N.Poiteau-1985
  - Traits: ROOTSTOCK, SCAB RESISTANT, PEAR DECLINE SUSCEPTIBLE
• Japanese Golden Russet x Mikado (Decline Susc.) = PI 541763 (1229.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Japanese Golden Russett x Mikado
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: ROOTSTOCK, SCAB RESISTANT, PEAR DECLINE SUSCEPTIBLE
• Japanese Pear x Quince hybrid PQ-5 = Q 24554 (14.001) - ×Pyronia sp.
  - Pedigree: Pyrus pyrifolia x Cydonia oblonga
• Jarve Seemik = PI 665810 (2862.001) - Pyrus communis L.
• Jeanne d'Arc = PI 541553 (2282.001) - Pyrus communis L.
  - Pedigree: Buerre Diel x Doyenne du Comice
  - Virus Biological Assays - Negative: MM-2001 NP-2002 PV-1993
  - Traits: QUINCE COMPATIBLE, HEIRLOOM
• Jeribasma (3x) = PI 617615 (2541.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1999 PV-1999
  - Traits: SCAB RESISTANT, PSYLLA RESISTANT, POLYPLOID (3x flow cytometry 2008)
• Jesinji Vodenac (3x) = PI 483392 (1546.005) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2003 NP-1990 PV-1990
  - Traits: SCAB RESISTANT, POLYPLOID (3x flow cytometry 2007)
• Jilin = CPYR 3017 (3017.001) - Pyrus sp.
  - Pedigree: O.P. seedling from market fruit purchased in Antu, Jilin, China
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2014)
• Jilin Market 99015 = PI 637991 (2709.001) - Pyrus sp.
  - Pedigree: Collected at a market in Antu, Jilin, China
  - Traits: LATE RIPE
• Jilin Market 99015 = PI 637991 (2709.002) - Pyrus sp.
  - Pedigree: Collected at a market in Antu, Jilin, China
• Jilin Market 99015 = PI 637991 (2709.003) - Pyrus sp.
  - Pedigree: Collected at a market in Antu, Jilin, China
• Jilin Market 99015 = PI 637991 (2709.004) - Pyrus sp.
  - Pedigree: Collected at a market in Antu, Jilin, China
• Jilin Market 99015 = PI 637991 (2709.005) - Pyrus sp.
  - Pedigree: Collected at a market in Antu, Jilin, China
• Jiugnos = PI 617527 (2204.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Old Italian Cultivar
  - Virus Biological Assays - Positive: NP-1993 PV-1989 VY-1985
  - Traits: VERY EARLY RIPE
• Jiugnos = PI 617527 (2204.004) - Pyrus communis L.
  - Pedigree: Old Italian Cultivar
  - Virus Biological Assays - Negative: MM-1996 NP-1995 PV-1995
  - Traits: VERY EARLY RIPE
• Joey's Red Flesh Pear (=Blutbirne?) = PI 617584 (2505.001) - Pyrus communis L.
  - Pedigree: Possibly = Blutbirne
  - Virus Biological Assays - Negative: NP-1993 PV-1993
  - Traits: RED FLESH, AUTUMN RIPE
• Joghoso I = PI 654926 (2654.002) - Pyrus ×sinkiangensis T. T. Yu
  - Pedigree: Collected from the wild in Pakistan
• Johantorp = PI 285530 (304.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1988 N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Crab-1988
  - Traits: VERY LATE RIPE, COLD HARDY, GOOD STORAGE, CURATOR CHOICE
• John = PI 617629 (2558.001) - Pyrus hybrid
  - Pedigree: Pyrus ussuriensis x Aspa
  - Virus Biological Assays - Negative: MM-1999 NP-1996 PV-1996
  - Traits: COLD HARDY
• John Innes No. 3996 (5x?) = PI 205464 (706.002) - Pyrus communis L.
  - Pedigree: Uncertain, 5n
  - Virus Biological Assays - Negative: NP-1990
  - Traits: POLYPLOID (4x flow cytometry 2013)
• Josephine de Malines = PI 200378 (305.005) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1992 PV-1992
  - Traits: QUINCE COMPATIBLE, HEIRLOOM
• Jubilee = PI 437051 (306.001) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-2003 Pyronia-1984
  - Traits: COLD HARDY, DIPLOID (flow cytometry)
• Jubileer D'Ar (=Pautalia) = PI 541341 (1104.002) - Pyrus communis L.
  - Pedigree: Clapp Favorite x Klementina
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: VERY EARLY RIPE
• Jubileinaia = PI 292376 (307.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: Vein Yellows-1985, Negative: Bosc-1988
  - Traits: COLD HARDY
• Jules d'Airolles = PI 386006 (310.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1988 M.micromalus-2003 N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Crab-1992
  - Traits: LATE RIPE, VIRUS INDICATOR, HEIRLOOM, POLYPLOID (3x flow cytometry 2013)
• June Sugar = PI 541501 (2105.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1996 NP-1992 PV-1992
  - Traits: VERY EARLY RIPE
• Junsko Zlato = PI 617620 (2548.001) - Pyrus communis L.
  - Pedigree: Precoce de Trevoux x Doyenne de Juillet
  - Virus Biological Assays - Negative: NP-1999 PV-1999
  - Traits: VERY EARLY RIPE
• Juteuse de Chailly = PI 541512 (2120.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1989 Pyronia-1989
  - Traits: POLYPLOID (3x flow cytometry 2013)
• K-23195 - Russia = PI 654948 (2762.001) - Pyrus sp.
• Kair Aarmund = PI 282972 (311.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: VERY EARLY RIPE, HIGH QUALITY, DIPLOID (flow cytometry)
• Kajzerka (3x) = PI 506387 (1683.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: M.micromalus-2001 N.Poiteau-1987 Pyronia-1987 V.Crab-1991
  - Traits: PSYLLA RESISTANT, POLYPLOID (3x flow cytometry 2008)
• Kalebasa Plocka = PI 483373 (1527.001) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-2003 Pyronia-1985 V.Crab-1992, Uncertain: Bosc-1989
  - Traits: LATE RIPE, DIPLOID (flow cytometry)
• Kalle = PI 541312 (313.002) - Pyrus communis L.
  - Pedigree: Clapp Favorite mutant
  - Traits: FIRE BLIGHT SUSCEPTIBLE, RED SKIN, DIPLOID (flow cytometry)
• Kansu Pear = PI 40019 (314.001) - Pyrus sp. - VIRUS INFECTED
  - Pedigree: Seedling selection from seedlot collected wild in China
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Positive: B13-1983, Negative: M.micromalus-2003 Pyronia-1993, Uncertain: N.Poiteau-1983
  - Traits: DIPLOID (flow cytometry)
• Kansu x self = PI 541956 (629.001) - Pyrus sp.
  - Pedigree: Kansu x self
  - Virus Biological Assays - Negative: B13-1983 M.micromalus-1999 N.Poiteau-1985 Pyronia-1985 V.Crab-1992
• Karadede 86-3 - Turkmenistan = PI 654955 (2776.001) - Pyrus communis L.
• Karamanlika (3x) = PI 502165 (1625.004) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1996 PV-1991
  - Traits: PSYLLA RESISTANT, POLYPLOID (3x flow cytometry 2008)
• Karamanlika (3x) = PI 617613 (2539.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1999 PV-1999
  - Traits: PSYLLA RESISTANT, POLYPLOID (3x flow cytometry 2008)
• Katman (= Kalman) (3x) = PI 502172 (1632.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PNRSV-1990
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1989 V.Crab-1991
  - Traits: PSYLLA RESISTANT, POLYPLOID (3x flow cytometry 2008)
• Khan Tangoo I (great pear) = PI 654939 (2722.001) - Pyrus pyrifolia hybrid
  - Virus Biological Assays - Negative: NP-2002 PV-2002
  - Traits: DIPLOID (flow cytometry 2012)
• Kharnak I (donkey pear) = PI 665794 (2662.002) - Pyrus pashia hybrid
  - Traits: NOT COLD HARDY, FRUIT HARD and only fit for donkeys
• Kieffer = PI 541714 (1166.001) - Pyrus hybrid
  - Pedigree: P. pyrifolia x Bartlett
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: LA62-1983 M.micromalus-2003 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, LOW CHILL 680 hrs, QUINCE COMPATIBLE, DIPLOID (flow cytometry), HEIRLOOM
• Kikusui = PI 228014 (317.003) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Taihaku x Nijisseiki
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1998 PV-1998
  - Traits: FIRE BLIGHT SUSCEPTIBLE, BLACK SPOT RESISTANT, MILDEW RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry)
• Kimizukawase = PI 352633 (318.002) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Shinkozo x Doitsu
  - Virus Biological Assays - Negative: MM-2003
  - Traits: EARLY RIPE
• King Sobieski = PI 260161 (490.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1991 PV-1991
• Kiparyjska = PI 307542 (320.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1997 NP-1990 PV-1989 VC-1989
  - Traits: EARLY RIPE
• Kiselac (3x) = PI 483390 (1544.002) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Biological Assays - Negative: NP-1990 PV-1990
  - Traits: POLYPLOID (3x flow cytometry 2013)
• Klementinka = PI 392320 (321.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Parentage unknown.
  - Virus Biological Assays - Positive: M.micromalus-2003, Negative: Bosc-1989 N.Poiteau-1987 P.Crassane-1984 Pyronia-1984
  - Traits: EARLY RIPE
• Klementinka = PI 392320 (321.002) - Pyrus communis L.
  - Pedigree: Parentage unknown.
  - Virus Biological Assays - Negative: NP-2001 PV-2001
  - Traits: EARLY RIPE, CURATOR CHOICE
• Koyama Pear = PI 541805 (1648.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Nijusseiki x P. communis European Cultivar
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987, Uncertain: M.micromalus-1995
• Krolewka = PI 483374 (1528.002) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Biological Assays - Negative: NP-1990 PV-1990
  - Traits: SCAB RESISTANT
• Kruidernier = PI 295680 (327.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1993 PV-1991
  - Traits: VERY EARLY RIPE
• Krupen Burnusus = PI 483387 (1541.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1989 Pyronia-1985
  - Traits: PSYLLA RESISTANT, DIPLOID (flow cytometry), VERY EARLY RIPE
• Krylov = PI 127715 (1106.001) - Pyrus hybrid
  - Pedigree: Saponsky x Lincoln
  - Virus Biological Assays - Negative: M.micromalus-1998 N.Poiteau-1985 Pyronia-1989
  - Traits: FIRE BLIGHT RESISTANT, COLD HARDY, MILDEW RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry)
• Kumoi = PI 228015 (1181.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Ishiiwase x Yakumo
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1985 Pyronia-1990 V.Crab-1988
  - Traits: BLACK SPOT RESISTANT, SCAB RESISTANT
• Kumoi [Kumoe] = PI 228015 (329.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Ishiiwase x Yakumo
  - Traits: BLACK SPOT RESISTANT, SCAB RESISTANT
• Kustendil No. 510 = PI 392324 (704.002) - Pyrus communis L.
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1987 PV-1987
  - Traits: VERY LATE RIPE
• Kustendil No. 980 = PI 392325 (705.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1985
• Kyles Sugar = PI 541342 (1107.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1995 PV-1995
• LA-62 (Virus Indicator) = PI 541318 (701.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1983 Pyronia-1985
  - Traits: VERY LATE RIPE, VIRUS INDICATOR
• La France = PI 617638 (2569.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1999 PV-1999
  - Traits: HEIRLOOM
• La Providence = PI 278728 (338.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Crab-1988
  - Traits: LOW CHILL
• Lacock No. 6 = PI 541313 (331.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1988 M.micromalus-1996 N.Poiteau-2003 P.Crassane-1984
• Lady Clapp = PI 541211 (332.004) - Pyrus communis L.
  - Pedigree: Probably a seedling selection
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: HEIRLOOM, POLYPLOID (3x flow cytometry 2013)
• Laioyang 50 = PI 144035 (1105.002) - Pyrus sp.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1989 PV-1989
  - Traits: MILDEW RESISTANT, LOW CHILL, EARLY BLOOM, DIPLOID (flow cytometry)
• Lajre (3x) = PI 295092 (335.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Crab-1989, Uncertain: Bosc-1987
  - Traits: POLYPLOID? DIPLOID (flow cytometry 2012,2014)
• Lakewood = PI 617547 (2360.002) - Pyrus communis L.
  - Pedigree: probably seedling of unknown parentage
  - Virus Biological Assays - Negative: MM-2001 NP-1993 PV-1993
  - Traits: VERY LATE RIPE
• Lange Graticol = PI 264195 (336.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1990
  - Traits: VERY LATE RIPE, VERY LARGE FRUIT, POLYPLOID (3x flow cytometry 2013)
• Lantai Jululi = PI 654949 (2765.001) - Pyrus ×sinkiangensis T. T. Yu
  - Traits: FRAGRANT PEAR
• Lao Suan Li [Lo Suan Li] = PI 541994 (355.001) - Pyrus ussuriensis Maxim.
  - Pedigree: old cultivar from northeast China
  - Virus Biological Assays - Negative: Bosc-1988 N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Crab-1988
  - Traits: FIRE BLIGHT RESISTANT
• Latvian A = PI 144311 (1108.001) - Pyrus communis L.
  - Pedigree: Seedling selection from Latvian seedlot PI 124067
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1987 P.Crassane-1985 Pyronia-1988
• Lawrence = PI 541212 (339.002) - Pyrus communis L.
  - Pedigree: St. Germain x White Doyenne
  - Virus Biological Assays - Negative: NP-1990 PV-1991
  - Traits: LATE RIPE, HEIRLOOM
• Lawson = PI 541213 (340.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Chance seedling
  - Virus Biological Assays - Positive: Vein Yellows-1985, Negative: Bosc-1989 V.Crab-1988
  - Traits: EARLY RIPE, HEIRLOOM
• Laxinoua = PI 541479 (2022.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: N.Poiteau-1993 Vein Yellows-2004, Negative: Pyronia-1993
• Laxton's Early Market = PI 541541 (2267.003) - Pyrus communis L.
  - Pedigree: Marie Louise x Doyenne d'Ete
  - Virus Biological Assays - Negative: NP-2003 PV-2001, Uncertain: VIRUS-2000
  - Traits: VERY EARLY RIPE
• Laxton's Foremost = PI 541542 (2268.002) - Pyrus communis L.
  - Pedigree: Marechal du Cour x Fertility
  - Virus Biological Assays - Negative: NP-1995 PV-1995
  - Traits: FIRE BLIGHT SUSCEPTIBLE
• Laxton's Progress = PI 127039 (1109.003) - Pyrus communis L.
  - Pedigree: Marie Louise x Bartlett
  - Virus Biological Assays - Negative: NP-1989 PV-1987, Uncertain: MM-2001
  - Traits: FIRE BLIGHT SUSCEPTIBLE
• Laxton's Record = PI 541540 (2266.003) - Pyrus communis L.
  - Pedigree: Marie Louise x Doyenne du Comice
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1993 PV-1993
• Laxton's Satisfaction = PI 127041 (1110.003) - Pyrus communis L.
  - Pedigree: Bartlett x Beurre Superfin
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: FIRE BLIGHT SUSCEPTIBLE
• Laxton's Superb = PI 541543 (2269.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Buerre Superfin x William's Bon Chretien (Bartlett)
  - Virus Biological Assays - Positive: VY-1985, Negative: NP-1989 PV-1989
  - Traits: FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE
• Le Brun = PI 263682 (341.003) - Pyrus communis L.
  - Pedigree: From mixed seed of Doyenne D'Hiver and Beurre D'Arenberg
  - Virus Biological Assays - Negative: MM-1999 NP-1990 PV-1987 VC-1989
  - Traits: HEIRLOOM
• Le Conte = PI 637997 (2732.001) - Pyrus hybrid
  - Pedigree: Chinese Sand Pear x P. communis
  - Virus Biological Assays - Negative: MM-2002 NP-2002
  - Traits: FIRE BLIGHT SUSCEPTIBLE, LOW CHILL 680 hrs, HEIRLOOM
• Le Lectier = PI 260158 (343.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Bartlett x Bergamotte Fortunee
  - Virus Biological Assays - Positive: P.Crassane-1984, Negative: V.Crab-1988, Uncertain: Bosc-1989 Pyronia-1984
  - Traits: MONOLINIA RESISTANT, LATE RIPE, HEIRLOOM
• Le Nain Vert (Genetic Dwarf) = PI 322035 (344.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1999 N.Poiteau-1988 P.Crassane-1984 Pyronia-1987
  - Traits: GENETIC DWARF, SPECIALTY, DIPLOID (flow cytometry), HEIRLOOM
• Ledbetter Pear = PI 641280 (2597.001) - Pyrus sp. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1998 PV-1998
  - Traits: LATE RIPE, LOW CHILL
• Lehoux Grignon = PI 541214 (345.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987
• Lemon = PI 541215 (346.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1988 P.Crassane-1984
  - Traits: FIRE BLIGHT RESISTANT, HEIRLOOM
• Leona = PI 617600 (2524.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: MM-2001 NP-1997 PV-1997
  - Traits: LATE RIPE, LOW CHILL 450 hrs, SCAB RESISTANT
• Leopardo Morettini = PI 318867 (347.001) - Pyrus communis L.
  - Pedigree: Coscia x Decana d'Inverno (Doyenne d'Hiver)
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1997 N.Poiteau-1988 P.Crassane-1984 Pyronia-1984 V.Crab-1989
  - Traits: RUSSET FRUIT, CURATOR CHOICE
• Lesnaia Krasavitza (=Flemish Beauty) = PI 292375 (348.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1987 M.micromalus-2002 N.Poiteau-1988 P.Crassane-1984 Pyronia-1984 V.Crab-1989
  - Traits: COLD HARDY, DIPLOID (flow cytometry)
• Lezinova = PI 282973 (351.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1992 PV-1989
  - Traits: LARGE FRUIT
• Lida = PI 617609 (2535.001) - Pyrus ussuriensis hybrid
  - Virus Biological Assays - Negative: NP-1997 PV-1997
• Lieutenant Poidevin = PI 541216 (352.004) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1990 PV-1989 VC-1989
  - Traits: HEIRLOOM, LARGE FRUIT
• Lincoln = PI 541217 (354.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: Bosc-1988 M.micromalus-1997 N.Poiteau-1987 P.Crassane-1984 Pyronia-1991 V.Crab-1989
  - Traits: FIRE BLIGHT RESISTANT, HEIRLOOM
• Liu Yue Xian [Liu Yue Shian] = PI 637988 (2545.001) - Pyrus ussuriensis Maxim.
  - Virus Biological Assays - Negative: MM-1998 NP-1998 PV-1998
• Liu Yue Xian [Liu Yue Shian] = PI 637988 (2545.002) - Pyrus ussuriensis Maxim.
• Longworth = PI 541219 (357.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989
  - Traits: FIRE BLIGHT RESISTANT, HEIRLOOM
• Louis Pasteur = PI 260159 (359.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1988 Pyronia-1988 V.Crab-1988, Uncertain: P.Crassane-1984
  - Traits: QUINCE COMPATIBLE, RUSSET FRUIT
• Louis Vilmorin = PI 541221 (361.002) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Beurre Clairgeau
  - Virus Biological Assays - Negative: NP-1989 PV-1987 VC-1989
  - Traits: VERY LATE RIPE, HEIRLOOM
• Louise Bonne d'Avranches (L.B. de Jersey) = PI 541220 (358.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2003 NP-1989 PV-1989
  - Traits: QUINCE COMPATIBLE, MONOLINIA RESISTANT, DIPLOID (flow cytometry), HEIRLOOM
• Louise Bonne d'Avranches (L.B. de Jersey) = PI 541502 (2106.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: seedling selection
  - Virus Lab Assays - Negative: ASGV-1989
  - Virus Biological Assays - Positive: N.Poiteau-1988
  - Traits: QUINCE COMPATIBLE, HEIRLOOM, MONOLINIA RESISTANT
• Louise Bonne d'Avranches Panachee (=variagated) = PI 617575 (2491.001) - Pyrus communis L.
  - Pedigree: Bud sport of Louise Bonne de Jersey
  - Virus Biological Assays - Negative: NP-1996 PV-1998
  - Traits: VARIEGATED, STRIPED FRUIT, QUINCE COMPATIBLE, HEIRLOOM
• Lowry No. 1 = PI 541222 (362.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Crab-1988
  - Traits: LOW CHILL
• Lucele (3x) = PI 483402 (1552.001) - Pyrus communis ssp. pyraster (L.) Ehrh. - VIRUS INFECTED
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Positive: N.Poiteau-1993 Pyronia-1993 Vein Yellows-1985
  - Traits: PSYLLA RESISTANT, POLYPLOID (3x flow cytometry 2008)
• Lucy Duke = PI 541223 (364.002) - Pyrus communis L.
  - Pedigree: Bartlett x (Winter Nelis?)
  - Virus Biological Assays - Negative: NP-2001 PV-2001
  - Traits: HEIRLOOM
• Lukavanski = PI 282974 (365.005) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1992 PV-1992
• Luscious = PI 541322 (367.001) - Pyrus communis L.
  - Pedigree: SD-E31 x Ewart
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1988 N.Poiteau-1987 P.Crassane-1984, Uncertain: M.micromalus-2003
  - Traits: COLD HARDY (fruited in Anchorage), MILDEW RESISTANT, SCAB RESISTANT, LOW CHILL , FIRE BLIGHT RESISTANT, DIPLOID (flow cy
• MM-38 = PI 541960 (1419.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1999 NP-1989 PV-1989
  - Traits: ROOTSTOCK, SCAB RESISTANT
• Mac = PI 541343 (1111.004) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Gorham x NJ 1
  - Virus Biological Assays - Positive: VY-1985, Negative: NP-1993 PV-1993
  - Traits: FIRE BLIGHT RESISTANT, MID RIPE
• Madame Andre Leroy = PI 541224 (370.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Positive: Bark Problem-2003, Negative: Bosc-1988 M.micromalus-1997 N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Cr
  - Traits: LATE RIPE, HEIRLOOM
• Madame Boutant = PI 255614 (371.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1985 V.Crab-1988
• Madame Favre = PI 541225 (372.003) - Pyrus communis L.
  - Pedigree: Beurre d'Hardenpont x o.p.
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: HEIRLOOM
• Madame Gillekins = PI 137111 (1112.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987
• Madame Lye Baltet = PI 541226 (373.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987 VC-1989
  - Traits: VERY LATE RIPE, HEIRLOOM
• Madame Soulanges = PI 123968 (374.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2001 PV-2001
  - Traits: LATE RIPE
• Madame Treyve = PI 141256 (1652.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Seedling selection
  - Virus Biological Assays - Positive: N.Poiteau-1987 Pyronia-1987 Vein Yellows-1985
  - Traits: HEIRLOOM
• Madame Verte = PI 130990 (1113.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: VERY LATE RIPE, HEIRLOOM
• Madame du Ballett = PI 231810 (389.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2003 NP-1990 PV-1989
  - Traits: DIPLOID (flow cytometry), HEIRLOOM
• Magness = PI 541299 (1167.001) - Pyrus communis L.
  - Pedigree: Seckel seedling x Comice
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-2000 N.Poiteau-2003 Pyronia-1985
  - Traits: FIRE BLIGHT RESISTANT, SCAB RESISTANT, QUINCE COMPATIBLE, CYTOPLASMIC MALE STERILITY, DIPLOID (flow cytometry 2014)
• Man Yuan Xiang [Man Yuan Hsiang] = PI 541996 (378.002) - Pyrus ussuriensis Maxim.
  - Pedigree: old local cultivar from northeast China
  - Virus Biological Assays - Negative: MM-1998 NP-1995 PV-1995
  - Traits: FIRE BLIGHT RESISTANT, SCAB RESISTANT
• Mandan 58-4 = PI 541724 (1114.004) - Pyrus hybrid
  - Pedigree: Patten x Parker, hybrid
  - Virus Biological Assays - Negative: NP-1989 PV-1990
  - Traits: COLD HARDY
• Manning-Miller = PI 541480 (2296.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Unknown. Seed prob. sent from Massachusetts by R. Manning.
  - Virus Biological Assays - Positive: NP-1993 PV-1993 VY-1985
  - Traits: COLD HARDY, SCAB RESISTANT, FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry 2014)
• Manning-Miller = PI 541480 (2296.002) - Pyrus communis L.
  - Pedigree: Unknown. Seed prob. sent from Massachusetts by R. Manning.
  - Virus Biological Assays - Negative: NP-2003 PV-2001
  - Traits: COLD HARDY, SCAB RESISTANT, FIRE BLIGHT RESISTANT
• Marchland = PI 541228 (380.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989, Uncertain: PV-1989 PV-1999
• Marguerite Marillat = PI 541229 (381.005) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1990
  - Traits: MALE STERILE, DIPLOID (flow cytometry), HEIRLOOM
• Marie Louise = PI 541230 (382.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: HEIRLOOM
• Marie Louise D'uccle = PI 654925 (2650.004) - Pyrus communis L.
  - Pedigree: open pollinated seedling of Marie Louise
  - Virus Biological Assays - Negative: NP-2004
  - Traits: HEIRLOOM
• Mariette de Millepieds = PI 255615 (383.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: VERY LATE RIPE, HEIRLOOM
• Marks = PI 541446 (1116.001) - Pyrus communis L.
  - Pedigree: Seedling selection from seedlot received from Marks in NY
  - Virus Biological Assays - Negative: N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
• Marqueza = PI 183962 (1117.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: EARLY RIPE
• Martin Sec = PI 617645 (2576.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1996 VY-1996, Uncertain: RING-1996
  - Traits: ANCIENT, HEIRLOOM, PERRY POTENTIAL , DIPLOID (flow cytometry 2014)
• Martin Sec = PI 617645 (2576.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-2003 NP-1999 PV-1999
  - Traits: ANCIENT, HEIRLOOM, PERRY POTENTIAL
• Martin Sec = PI 654924 (2648.002) - Pyrus communis L.
  - Traits: ANCIENT, HEIRLOOM
• Mathilde Recq. 68 = PI 264196 (384.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1987 N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Crab-1988
  - Traits: HEIRLOOM
• Maxine = PI 541231 (547.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1998 N.Poiteau-1991 Pyronia-1991 V.Crab-1991
  - Traits: FIRE BLIGHT RESISTANT, MILDEW RESISTANT, QUINCE COMPATIBLE, DIPLOID (flow cytometry), HEIRLOOM
• Mednik = PI 483399 (1549.002) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Biological Assays - Negative: MM-1999 NP-1990 PV-1990 VC-1992
  - Traits: PSYLLA RESISTANT, DIPLOID (flow cytometry)
• Meigetsu = PI 97348 (1119.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-2002 N.Poiteau-1985 Pyronia-1988
  - Traits: FIRE BLIGHT SUSCEPTIBLE, MILDEW RESISTANT, DIPLOID (flow cytometry)
• Mellina = PI 324132 (391.002) - Pyrus communis L.
  - Pedigree: Butirra Clairgeau x Williams (pollen tr. in magnetic field)
  - Virus Biological Assays - Negative: NP-1989
• Mendel = PI 541232 (392.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1989 VC-1989
• Menie = PI 318838 (1723.001) - Pyrus communis L.
  - Pedigree: Kurskaya x Flemish Beauty
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1991
  - Traits: COLD HARDY
• Merricourt = PI 541345 (1120.001) - Pyrus communis L.
  - Pedigree: Seckel x Late Faulkner
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1985 Pyronia-1988
  - Traits: FIRE BLIGHT RESISTANT
• Messire Jean = PI 541233 (393.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: LATE RIPE, ANCIENT, HEIRLOOM
• Mian Suan = PI 665780 (2869.001) - Pyrus ussuriensis Maxim.
  - Traits: DIPLOID (flow cytometry 2014)
• Michurin Beurré Zimnaya (Winter) = PI 312503 (2386.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-1992 PV-1991
  - Traits: LATE RIPE, HEIRLOOM, COLD HARDY
• Mien Suan Li (3x) = PI 542006 (1121.001) - Pyrus ussuriensis Maxim.
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1988
  - Traits: FIRE BLIGHT RESISTANT, POLYPLOID (3x flow cytometry 2013)
• Miller Seedling (Flower Mountain Pear) = PI 617550 (2364.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1993 PV-1993
  - Traits: LOW CHILL, SCAB RESISTANT
• Miney = PI 617572 (2455.001) - Pyrus communis L.
  - Pedigree: Zuckerbirne x Clapp Favorite
  - Virus Biological Assays - Negative: NP-1992 PV-1992
  - Traits: FIRE BLIGHT RESISTANT, COLD HARDY
• Minister Dr. Lucius = PI 312504 (394.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: Pyronia-1993 Vein Yellows-1985, Negative: N.Poiteau-1993 V.Crab-1988
  - Traits: POLYPLOID (3x flow cytometry 2013)
• Mirandino Rosso (=Bella di Guigno) = PI 617639 (2570.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1996 PV-1998
  - Traits: VERY EARLY RIPE, STRONG UPRIGHT GROWTH HABIT, HEIRLOOM
• Mishirasu = PI 657919 (2821.001) - Pyrus pyrifolia (Burm. f.) Nakai
• Mission La Purisima Pear 1-A = PI 617579 (2500.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1997 PV-1999
  - Traits: HEIRLOOM
• Mission La Purisima Pear 1-C = PI 617582 (2503.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1997 PV-1997 RING-1999 VY-1999
  - Traits: HEIRLOOM
• Mission La Purisima Pear 17-E = PI 617578 (2499.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1997 PV-1997
  - Traits: HEIRLOOM
• Mission La Purisima Pear 17-G = PI 617581 (2502.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1999 PV-1999
  - Traits: HEIRLOOM
• Mission La Purisima Pear 18-H = PI 617577 (2498.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1997 PV-1997
  - Traits: HEIRLOOM
• Mission La Purisima Pear 2-A = PI 617580 (2501.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: PV-1998, Negative: NP-1998
  - Traits: HEIRLOOM
• Mission La Purisima Pear 2-A = PI 617580 (2501.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2003
  - Traits: HEIRLOOM
• Mission San Juan Bautista Pear = PI 617683 (2711.001) - Pyrus communis L.
  - Pedigree: Pyrus communis brought to and planted at Mission San Juan Buatista, California prior to 1836.
  - Traits: HEIRLOOM, EARLY RIPE, DIPLOID (flow cytometry 2014)
• Mississippi US 3-10-5 = PI 541346 (1122.001) - Pyrus communis L.
  - Pedigree: PI 49492 x Buerre Bosc
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1984 Pyronia-1985
  - Traits: FIRE BLIGHT RESISTANT, LOW CHILL
• Missouri No. 83 = PI 541720 (395.002) - Pyrus hybrid
  - Virus Biological Assays - Negative: MM-1996 NP-1990 PV-1989, Uncertain: VC-1989
• Mitchell = PI 142234 (1123.004) - Pyrus communis L.
  - Pedigree: Uncertain, P. communis hybrid
  - Virus Biological Assays - Negative: NP-1990 PV-1995
  - Traits: HEIRLOOM
• Moe = PI 541347 (1124.003) - Pyrus communis L.
  - Pedigree: Zuckerbirne x Clapp Favorite
  - Virus Biological Assays - Negative: NP-1990 PV-1995
  - Traits: FIRE BLIGHT RESISTANT, COLD HARDY
• Moknine No. 4 - Tunisia = PI 617616 (2542.001) - Pyrus communis L.
  - Pedigree: Local cultivar from Moknine, Tunisia.
  - Virus Biological Assays - Negative: MM-2001 NP-2001 PV-1999
  - Traits: LOW CHILL, EARLY RIPE
• Monchallard = PI 541234 (397.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: MONOLINIA RESISTANT, HEIRLOOM
• Monterrey = PI 541903 (1125.004) - Pyrus hybrid
  - Pedigree: Pineapple (?) x P. communis
  - Virus Biological Assays - Negative: MM-2002 NP-2003 PV-2002
  - Traits: FIRE BLIGHT RESISTANT, LOW CHILL, MILDEW RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry)
• Mooers = PI 541314 (398.001) - Pyrus communis L.
  - Pedigree: Duchesse D'Angouleme x Late Faulkner
  - Virus Biological Assays - Negative: M.micromalus-1999 N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Crab-1989
  - Traits: FIRE BLIGHT RESISTANT
• Moonglow = PI 541315 (399.001) - Pyrus communis L.
  - Pedigree: US-Mich. 437 x Roi Charles Wurtemburg
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-2001 Pyronia-1984 V.Crab-1992
  - Traits: FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry)
• Mora = PI 324133 (401.003) - Pyrus communis L.
  - Pedigree: Butirra Clairgeau x Martin Secco (x-ray pollen)
  - Virus Biological Assays - Negative: NP-1992 PV-1992
• Morettini 113 = PI 318869 (402.001) - Pyrus communis L.
  - Pedigree: Williams x Citron des Carmes
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1997 N.Poiteau-1985 Pyronia-1984 V.Crab-1991
  - Traits: VERY EARLY RIPE
• Morgan = PI 617549 (2363.001) - Pyrus communis L.
  - Pedigree: Bartlett x Late Faulkner
  - Virus Biological Assays - Negative: NP-1991 PV-1992, Uncertain: MM-2001
  - Traits: FIRE BLIGHT RESISTANT, SCAB RESISTANT
• Morocco Common Pear = PI 104299 (1126.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Probably a seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Positive: B13-1983 N.Poiteau-2002, Negative: Pyronia-1989
  - Traits: DIPLOID (flow cytometry)
• Muscat = PI 541511 (2119.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1992 PV-1992
  - Traits: DIPLOID (flow cytometry)
• Muskatelka Prava = PI 282975 (403.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990
• Muskatelka Seda = PI 282976 (405.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1989
  - Traits: POLYPLOID (3x flow cytometry 2013)
• Mustafabey = PI 324134 (406.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1988 P.Crassane-1984 Pyronia-1984 V.Crab-1989
  - Traits: COMPACT HABIT, EARLY RIPE, MILDEW RESISTANT, DIPLOID (flow cytometry)
• N 217-27.12 (rootstock selection) = PI 665801 (2740.001) - Pyrus communis L.
  - Virus Biological Assays - Uncertain: PV-2003
  - Traits: ROOTSTOCK
• NY 10262 = PI 541807 (1658.001) - Pyrus hybrid
  - Pedigree: Seckel x Ill #65 (P. ussuriensis)
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987 V.Crab-1989
  - Traits: FIRE BLIGHT RESISTANT, PSYLLA RESISTANT
• NY 10353 = PI 541809 (1660.001) - Pyrus hybrid
  - Pedigree: Russet Flemish Beauty x NY 10257 (Bartlett x Ill. #65)
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-2003 N.Poiteau-1987 Pyronia-1987 V.Crab-1989
  - Traits: FIRE BLIGHT RESISTANT, PSYLLA RESISTANT, MILDEW RESISTANT, DIPLOID (flow cytometry)
• NY 10355 = PI 541808 (1659.001) - Pyrus hybrid
  - Pedigree: Bartlett x NY 10255
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1988 V.Crab-1989
  - Traits: FIRE BLIGHT RESISTANT, PSYLLA RESISTANT
• Nadezda (Hope) = PI 617611 (2537.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2001 PV-1999
• Nagy Szegfukorte = PI 449286 (122.004) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Biological Assays - Negative: MM-1997 NP-1990 PV-1989 VC-1989
  - Traits: SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Nak I - Pakistan = Q 27432 (2759.001) - Pyrus pyrifolia hybrid
• Nan Guo Li [Nangon Li] = PI 541965 (2254.002) - Pyrus ussuriensis Maxim.
  - Pedigree: seedling selection from Liaoning
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: MILDEW RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry), PERRY POTENTIAL, HEIRLOOM
• Napoca = PI 665776 (2440.002) - Pyrus communis L.
• Napoleon = PI 255616 (410.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: P.Crassane-1984, Negative: Bosc-1989
  - Traits: HEIRLOOM, MONOLINIA RESISTANT
• Nart = PI 654951 (2769.001) - Pyrus hybrid
• Nashpati II = PI 654928 (2666.002) - Pyrus hybrid
  - Virus Biological Assays - Uncertain: NP-2003
• Naspati = PI 250449 (411.001) - Pyrus pashia Buch.-Ham. ex D. Don
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-2002 N.Poiteau-1985 P.Crassane-1984 Pyronia-1991 V.Crab-1988
  - Traits: VERY LATE RIPE, LOW CHILL, NOT COLD HARDY, MILDEW RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry)
• Nelis x P. betulifolia = PI 541777 (1316.001) - Pyrus hybrid - VIRUS INFECTED
  - Pedigree: Nelis x P. betulaefolia seedling selection A
  - Virus Biological Assays - Negative: RUSSIAN-1988 V.Crab-1988, Uncertain: N.Poiteau-1990
  - Traits: ROOTSTOCK
• Nelis x P. betulifolia = PI 541777 (1316.002) - Pyrus hybrid
  - Pedigree: Nelis x P. betulaefolia seedling selection A
  - Virus Biological Assays - Negative: MM-1998 NP-1989 PV-1989
  - Traits: ROOTSTOCK
• Nelis x P. betulifolia = PI 541800 (1480.001) - Pyrus hybrid
  - Pedigree: Nelis x P. betulifolia seedling selection B
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987 V.Crab-1991
  - Traits: ROOTSTOCK
• Nepal 1-150 = Q 25261 (2641.005) - Pyrus pyrifolia hybrid
• Nepal 5049 = PI 654937 (2718.001) - Pyrus pashia hybrid
  - Virus Biological Assays - Negative: NP-2002 PV-2002
  - Traits: LOW CHILL, NOT COLD HARDY
• Nepal 5053 = PI 654923 (2642.002) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: NP-2004
• Nepal 5075 = PI 665786 (2644.002) - Pyrus pyrifolia (Burm. f.) Nakai
• Nepal 5137 = PI 654938 (2719.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: NP-2003 PV-2002
  - Traits: SCAB RESISTANT
• Nepal 6001 [M. baccata] = PI 665787 (2868.001) - Pyrus pashia Buch.-Ham. ex D. Don
  - Pedigree: Collected from the wild in Nepal.
  - Traits: NOT COLD HARDY
• Niitaka (=Singo) = PI 392317 (412.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Amanogawa x Imamuraaki
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1998 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1992
  - Traits: FIRE BLIGHT SUSCEPTIBLE, BLACK SPOT RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry)
• Nijisseiki = PI 224196 (413.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1987 N.Poiteau-1988 P.Crassane-1984 Pyronia-1984 V.Crab-1988, Uncertain: M.micromalus-2003
  - Traits: FIRE BLIGHT SUSCEPTIBLE, DIPLOID (flow cytometry), HEIRLOOM
• Nijisseiki [Er Shi Shinge] = PI 312496 (212.001) - Pyrus pyrifolia (Burm. f.) Nakai - VIRUS INFECTED
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Positive: N.Poiteau-1987 Pyronia-1987, Negative: P.Crassane-1985
  - Traits: FIRE BLIGHT SUSCEPTIBLE, HEIRLOOM
• Nijisseiki x D'Anjou = PI 617528 (2205.001) - Pyrus hybrid
  - Pedigree: 20th Century x D'Anjou
  - Virus Biological Assays - Negative: NP-1993 PV-1993
  - Traits: LATE RIPE
• Nijisseiki x Old Home = PI 541767 (1233.001) - Pyrus hybrid
  - Pedigree: Nijisseiki x Old Home
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985
  - Traits: ROOTSTOCK
• Nijisseiki x Old Home (Decline susceptible) = PI 541728 (415.001) - Pyrus hybrid
  - Pedigree: Nijisseiki x Old home decline susceptible
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Crab-1989
  - Traits: ROOTSTOCK, SCAB RESISTANT, PEAR DECLINE SUSCEPTIBLE
• Norhausen Forelle (Nordhäuser Forellenbirne) = PI 172495 (1128.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: LATE RIPE
• Normannischen Ciderbirne = PI 231806 (416.002) - Pyrus communis L. - VIRUS INFECTED
  - Virus Lab Assays - Positive: ASPV-2010
  - Virus Biological Assays - Negative: MM-2001 NP-1989 PV-1990 VC-1989
  - Traits: PERRY, SCAB RESISTANT
• Notaire Lepin (= Doyenne George Boucher) = PI 541235 (418.003) - Pyrus communis L.
  - Pedigree: seedling of Doyenne du Comice
  - Virus Biological Assays - Negative: NP-1992 PV-1992
  - Traits: VERY LATE RIPE, HEIRLOOM
• Nouveau Poiteau = PI 246419 (420.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Lab Assays - Positive: PBCVd-2000, Negative: ASGV-1989 TOMRSV-1986
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-1987 P.Crassane-1984 Pyronia-1984 V.Crab-1989, Uncertain: A20-2004 Bosc-1989
  - Traits: VERY LATE RIPE, VIRUS INDICATOR, DIPLOID (flow cytometry), HEIRLOOM
• Nouveau Poiteau = PI 246419 (420.002) - Pyrus communis L. - VIRUS INFECTED
  - Virus Lab Assays - Positive: PBCVd-2000
  - Virus Biological Assays - Negative: PV-1992
  - Traits: VIRUS INDICATOR, HEIRLOOM
• Nova = PI 541505 (2110.004) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998
  - Traits: COLD HARDY (fruited in Anchorage), PRECOCIOUS, apparently SELF-FERTILE
• O.P. seedling of PI 256000 = CIGC 42 (42.002) - ×Sorbopyrus sp.
  - Pedigree: X Sorbopyrus auricularis O.P.
  - Traits: ORNAMENTAL
• OH 20 fire blight resistant rootstock = PI 541237 (425.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Old Home seedling selection, probably hybrid w/pyrifolia
  - Virus Biological Assays - Positive: P.Crassane-1984, Negative: Bosc-1989
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• OH 50 fire blight resistant rootstock = PI 541238 (427.001) - Pyrus communis hybrid
  - Pedigree: Old Home seedling selection
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1988 P.Crassane-1984 Pyronia-1984, Uncertain: V.Crab-1989
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• OHxF 1 = PI 541408 (1336.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987
  - Traits: ROOTSTOCK, FIRE BLIGHT SUSCEPTIBLE
• OHxF 2 = PI 541413 (1342.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1988
  - Traits: ROOTSTOCK
• OHxF 4 = PI 541409 (1337.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 M.micromalus-1999 N.Poiteau-1990 Pyronia-1987 V.Crab-1991
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• OHxF 5 = PI 541410 (1338.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1987 P.Crassane-1985
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• OHxF 7 = PI 541399 (1322.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1985 Pyronia-1987 V.Crab-1992
  - Traits: ROOTSTOCK
• OHxF 9 = PI 541421 (1361.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1987
  - Traits: ROOTSTOCK
• OHxF 18 = PI 541397 (1320.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-1985 Pyronia-1987 V.Crab-1991
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK-Vigorous
• OHxF 23 = PI 541411 (1339.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987
  - Traits: ROOTSTOCK
• OHxF 29 = PI 541398 (1321.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1985 Pyronia-1987 V.Crab-1992
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• OHxF 34 = PI 541412 (1340.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1990 Pyronia-1984
  - Traits: ROOTSTOCK-Semidwarf
• OHxF 40 = PI 541402 (1325.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK-Productive
• OHxF 51 = PI 541369 (709.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: B13-1983 M.micromalus-1998 N.Poiteau-2003 P.Crassane-1985 Pyronia-1984
  - Traits: ROOTSTOCK-Dwarfing, Blooms with Bosc, DIPLOID (flow cytometry)
• OHxF 58 = PI 541454 (1613.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987, Uncertain: M.micromalus-2001
  - Traits: ROOTSTOCK
• OHxF 69 = PI 665738 (1343.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1984
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK-Semidwarf
• OHxF 87 = PI 541415 (1345.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: N.Poiteau-1991 Pyronia-1984, Uncertain: M.micromalus-2003
  - Traits: ROOTSTOCK-Semidwarf, Productive, Large Fruit Size, DIPLOID (flow cytometry)
• OHxF 97 = PI 541370 (726.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1998 Pyronia-1987, Uncertain: N.Poiteau-2003
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK-Vigorous, Productive, DIPLOID (flow cytometry)
• OHxF 101 = PI 541416 (1350.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK, Blooms with Bartlett
• OHxF 109 = PI 541417 (1351.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• OHxF 112 = PI 541418 (1354.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1988
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK-Vigorous
• OHxF 130 = PI 541406 (1330.002) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: MM-1999 NP-1987 PV-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• OHxF 132 = PI 541404 (1327.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: M.micromalus-2003 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1992
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• OHxF 198 = PI 541419 (1359.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1985 V.Crab-1992, Uncertain: M.micromalus-2001
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK-Vigorous
• OHxF 217 = PI 541371 (732.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1990 Pyronia-1988
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK-Semi-vigorous, Blooms with Bosc
• OHxF 226 = PI 541372 (733.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: Pyronia-1987
  - Traits: ROOTSTOCK
• OHxF 230 = PI 541420 (1360.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Lab Assays - Uncertain: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1990 Pyronia-1984 V.Crab-1992
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK-Semidwarf, Blooms with Bosc, DIPLOID (flow cytometry)
• OHxF 247 = PI 541422 (1362.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 M.micromalus-1997 N.Poiteau-1985 Pyronia-1987 V.Crab-1992
  - Traits: ROOTSTOCK, VERY LATE RIPE
• OHxF 257 = PI 541396 (1319.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-1985 Pyronia-1985 V.Crab-1992, Uncertain: B13-1983
  - Traits: ROOTSTOCK
• OHxF 259 = PI 541423 (1363.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: M.micromalus-1999 N.Poiteau-1985 Pyronia-1987 V.Crab-1992
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK, Blooms with Bosc, VERY LATE RIPE
• OHxF 261 = PI 541401 (1324.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• OHxF 266 = PI 541424 (1364.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1987 P.Crassane-1985 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK, Blooms with Bosc
• OHxF 267 = PI 541400 (1323.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK-Semi-vigorous
• OHxF 280 = PI 541425 (1365.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1987 Pyronia-1987 V.Crab-1992, Uncertain: M.micromalus-2001
  - Traits: ROOTSTOCK, FIRE BLIGHT SUSCEPTIBLE
• OHxF 282 = PI 541426 (1366.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• OHxF 288 = PI 541373 (734.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1990 P.Crassane-1985 Pyronia-1987 V.Crab-1991, Uncertain: M.micromalus-2001
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• OHxF 319 = PI 541427 (1367.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• OHxF 333 = PI 541405 (1572.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1998 N.Poiteau-1992 P.Crassane-1984 Pyronia-1992
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK-Semidwarf, Blooms with Bosc, DIPLOID (flow cytometry)
• OHxF 340 = PI 541403 (1326.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1988 P.Crassane-1985 Pyronia-1988 V.Crab-1992
  - Traits: ROOTSTOCK
• OHxF 361 = PI 541374 (735.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 P.Crassane-1983 Pyronia-1985 V.Crab-1991
  - Traits: ROOTSTOCK-Semi-vigorous, FIRE BLIGHT SUSCEPTIBLE
• OHxF 377 = PI 541428 (1369.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1987 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT ROOTSTOCK
• OHxF 512 = PI 541414 (1344.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1993 Pyronia-1993
  - Traits: ROOTSTOCK, SCAB RESISTANT, FIRE BLIGHT SUSCEPTIBLE
• OPR-001 = PI 541430 (1375.001) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Pedigree: Seedling of cultivar Anjou
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: ROOTSTOCK, SCAB RESISTANT
• OPR-005 OHxF C-44 = PI 617519 (1420.001) - Pyrus hybrid
  - Pedigree: Bartlett x (Old Home x Farmingdale)
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1987
  - Traits: ROOTSTOCK
• OPR-013 OHxF C-34 = PI 541368 (1422.001) - Pyrus communis L.
  - Pedigree: Old Home x Farmingdale
  - Virus Biological Assays - Uncertain: P.Crassane-1984
  - Traits: POSSIBLE DWARFING ROOTSTOCK, SCAB RESISTANT
• OPR-110 P. betulifolia No. 1 = PI 540943 (653.001) - Pyrus betulifolia Bunge - VIRUS INFECTED
  - Pedigree: Seedling selection from seed collected in China by Reimer
  - Virus Biological Assays - Positive: N.Poiteau-1983
  - Traits: FIRE BLIGHT RESISTANT ROOTSTOCK
• OPR-111 P. betulifolia No. 2 = PI 540944 (654.001) - Pyrus betulifolia Bunge
  - Pedigree: Seedling selection from seed collected in China by Reimer
  - Traits: FIRE BLIGHT RESISTANT ROOTSTOCK
• OPR-113 P. betulifolia No. 4 = PI 540945 (655.001) - Pyrus betulifolia Bunge - VIRUS INFECTED
  - Pedigree: Seedling selection from seed collected in China by Reimer
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Positive: M.micromalus-2003, Negative: N.Poiteau-1985 Pyronia-1985 V.Crab-1991
  - Traits: FIRE BLIGHT SUSCEPTIBLE ROOTSTOCK, DIPLOID (flow cytometry)
• OPR-114 P. betulifolia No. 5 = PI 540946 (656.001) - Pyrus betulifolia Bunge
  - Pedigree: Seedling selection from seed collected in China by Reimer
  - Virus Lab Assays - Negative: PNRSV-1990
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1990 Pyronia-1987, Uncertain: M.micromalus-2001
  - Traits: FIRE BLIGHT SUSCEPTIBLE ROOTSTOCK
• OPR-125 P. calleryana = PI 541066 (1314.002) - Pyrus calleryana Decne.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2003 NP-1990 PV-1990
  - Traits: ROOTSTOCK, DIPLOID (flow cytometry)
• OPR-132 P. calleryana = PI 541079 (1497.001) - Pyrus calleryana Decne.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: ROOTSTOCK
• OPR-135 P. calleryana = PI 541085 (1171.003) - Pyrus calleryana Decne.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1987 PV-1987
  - Traits: ROOTSTOCK
• OPR-138 P. calleryana = PI 541094 (2091.001) - Pyrus calleryana Decne. - VIRUS INFECTED
  - Pedigree: Seedling selection
  - Virus Biological Assays - Positive: N.Poiteau-1991 Pyronia-1991, Uncertain: VIRUS-2004
  - Traits: ROOTSTOCK, LOW CHILL
• OPR-141 = PI 541789 (1373.001) - Pyrus hybrid
  - Pedigree: P. ussuriensis x P. pyrifolia hybrid seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1990 Pyronia-1987
  - Traits: ROOTSTOCK
• OPR-156 P. calleryana = PI 541089 (2086.001) - Pyrus calleryana Decne.
  - Virus Biological Assays - Negative: N.Poiteau-2003
  - Traits: ROOTSTOCK
• OPR-157 P. calleryana = PI 541012 (1170.002) - Pyrus calleryana Decne.
  - Virus Biological Assays - Negative: NP-1990
  - Traits: ROOTSTOCK
• OPR-168 P. calleryana = PI 617520 (1427.001) - Pyrus calleryana Decne. - VIRUS INFECTED
  - Pedigree: Seedling selection
  - Virus Biological Assays - Positive: N.Poiteau-1985 P.Crassane-1985 Vein Yellows-1985
  - Traits: ROOTSTOCK, LOW CHILL
• OPR-177 P. calleryana = PI 541072 (1436.001) - Pyrus calleryana Decne. - VIRUS INFECTED
  - Pedigree: Seedling selection
  - Virus Biological Assays - Positive: N.Poiteau-1993 Vein Yellows-1985, Negative: Pyronia-1985
  - Traits: ROOTSTOCK
• OPR-187 P. calleryana = PI 541092 (2089.001) - Pyrus calleryana Decne.
  - Virus Biological Assays - Negative: N.Poiteau-2002, Uncertain: Pyronia-2002
  - Traits: ROOTSTOCK, LOW CHILL
• OPR-191 P. calleryana = PI 541074 (1438.001) - Pyrus calleryana Decne. - VIRUS INFECTED
  - Pedigree: Seedling selection
  - Virus Biological Assays - Positive: N.Poiteau-1985 Pyronia-1985
  - Traits: ROOTSTOCK
• OPR-193 P. calleryana = PI 541068 (1432.001) - Pyrus calleryana Decne. - VIRUS INFECTED
  - Pedigree: Seedling selection
  - Virus Biological Assays - Positive: N.Poiteau-1985
  - Traits: ROOTSTOCK, LOW CHILL
• OPR-195 P. calleryana 6 OP = PI 541076 (1440.001) - Pyrus calleryana Decne.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1987 V.Crab-1991, Uncertain: M.micromalus-2001
  - Traits: ROOTSTOCK
• OPR-211 P. calleryana (?) = PI 541101 (2098.001) - Pyrus calleryana Decne.
  - Traits: ROOTSTOCK
• OPR-220 P. calleryana = PI 541098 (2095.001) - Pyrus calleryana Decne. - VIRUS INFECTED
  - Virus Biological Assays - Positive: Pyronia-1999
  - Traits: ROOTSTOCK
• OPR-249 P. calleryana = PI 541070 (1434.001) - Pyrus calleryana Decne. - VIRUS INFECTED
  - Pedigree: Seedling selection
  - Virus Biological Assays - Positive: Pyronia-1985, Uncertain: N.Poiteau-1993
  - Traits: ROOTSTOCK
• OPR-259 P. betulifolia = PI 540981 (1378.001) - Pyrus betulifolia Bunge
  - Pedigree: P. betulifolia No. 3 seedling selection
  - Virus Biological Assays - Negative: M.micromalus-2001 N.Poiteau-1987 Pyronia-1985
  - Traits: CROWN GALL RESISTANT ROOTSTOCK
• OPR-260 P. betulifolia = PI 540982 (1379.001) - Pyrus betulifolia Bunge
  - Pedigree: P. betulifolia No. 3 seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1987 Pyronia-1985
  - Traits: CROWN GALL RESISTANT ROOTSTOCK
• OPR-261 P. betulifolia = PI 540983 (1380.001) - Pyrus betulifolia Bunge
  - Pedigree: P. betulifolia No. 3 seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: CROWN GALL RESISTANT ROOTSTOCK
• OPR-262 P. betulifolia = PI 540984 (1381.001) - Pyrus betulifolia Bunge
  - Pedigree: P. betulifolia No. 3 seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1987
  - Traits: CROWN GALL RESISTANT ROOTSTOCK
• OPR-263 P. betulifolia = PI 540985 (1382.001) - Pyrus betulifolia Bunge
  - Pedigree: P. betulifolia No. 3 seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1991
  - Traits: CROWN GALL RESISTANT ROOTSTOCK
• OPR-264 P. betulifolia = PI 540986 (1383.001) - Pyrus betulifolia Bunge
  - Pedigree: P. betulifolia No. 3 seedling selection from Asian seedlot
  - Virus Biological Assays - Negative: B13-1983 M.micromalus-1999 N.Poiteau-1985 Pyronia-1985 V.Crab-1992
  - Traits: CROWN GALL RESISTANT ROOTSTOCK
• OPR-265 P. betulifolia = PI 540987 (1384.001) - Pyrus betulifolia Bunge
  - Pedigree: P. betulifolia No. 3 seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1985
  - Traits: CROWN GALL RESISTANT ROOTSTOCK
• OPR-266 P. betulifolia = PI 540988 (1385.001) - Pyrus betulifolia Bunge
  - Pedigree: P. betulifolia No. 3 seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1987
  - Traits: CROWN GALL RESISTANT ROOTSTOCK
• OPR-268 P. calleryana = PI 541025 (667.001) - Pyrus calleryana Decne. - VIRUS INFECTED
  - Pedigree: P. calleryana seedling selection
  - Virus Biological Assays - Positive: B13-1983 Vein Yellows-1985, Uncertain: N.Poiteau-1985
  - Traits: ROOTSTOCK
• Oakhill = PI 617662 (2607.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Biological Assays - Positive: VY-1999, Negative: PV-2000
• Obican Vodenac (3x) = PI 502177 (1637.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1990, Uncertain: MM-2001
  - Traits: PSYLLA RESISTANT, SCAB RESISTANT, POLYPLOID (3x flow cytometry 2008)
• Okolo = PI 541908 (1185.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1988 V.Crab-1988, Uncertain: Bosc-1989
  - Traits: FIRE BLIGHT RESISTANT, COLD HARDY, SCAB RESISTANT
• Okusankichi = PI 392318 (428.001) - Pyrus pyrifolia (Burm. f.) Nakai - VIRUS INFECTED
  - Pedigree: Seedling of cultivar Wasesankichi
  - Virus Biological Assays - Positive: M.micromalus-1995 V.Crab-1989, Negative: Bosc-1987 N.Poiteau-1985 Pyronia-1984
  - Traits: VERY LATE RIPE, FIRE BLIGHT SUSCEPTIBLE, HEIRLOOM
• Old Home = PI 541456 (431.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1996 Pyronia-1984 V.Crab-1992, Uncertain: N.Poiteau-2003
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK, QUINCE COMPATIBLE, COLD HARDY, DIPLOID (flow cytometry)
• Old Home x P. betulifolia-1 = PI 541787 (1370.001) - Pyrus hybrid
  - Pedigree: Old Home x P. betulaefolia-1
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, SCAB RESISTANT
• Old Home x P. betulifolia-1 = PI 541788 (1371.001) - Pyrus hybrid
  - Pedigree: Old Home x P. betulaefolia-1
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1987, Uncertain: B13-1983
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK, SCAB RESISTANT
• Olia = PI 143979 (1130.001) - Pyrus hybrid - VIRUS INFECTED
  - Pedigree: P. ussuriensis x Finland Early Yellow
  - Virus Biological Assays - Positive: P.Crassane-1984 Vein Yellows-1985, Negative: Bosc-1989
  - Traits: COLD HARDY, FIRE BLIGHT RESISTANT
• Olivier de Serres = PI 541488 (2031.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: open pollinated seedling of Forunee d'Angers
  - Virus Biological Assays - Positive: N.Poiteau-1993 Pyronia-1993 Vein Yellows-1991
  - Traits: VERY LATE RIPE, QUINCE COMPATIBLE, HEIRLOOM, MONOLINIA RESISTANT, DIPLOID (flow cytometry 2014)
• Olivier de Serres = PI 541488 (2031.002) - Pyrus communis L.
  - Pedigree: open pollinated seedling of Forunee d'Angers
  - Virus Biological Assays - Negative: PV-2001
  - Traits: QUINCE COMPATIBLE, HEIRLOOM, MONOLINIA RESISTANT
• Onward = PI 437060 (432.001) - Pyrus communis L.
  - Pedigree: Laxton's Superb x Doyenne du Comice
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1997 N.Poiteau-2003 P.Crassane-1984 Pyronia-1984 V.Crab-1989
  - Traits: QUINCE COMPATIBLE, DIPLOID (flow cytometry), CURATOR CHOICE
• Ooharabeni = PI 617674 (2619.001) - Pyrus hybrid
  - Pedigree: Originally thought to be hybrid of Okusankichi and Max Red Bartlett.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-2003
  - Traits: ORNAMENTAL, SCAB RESISTANT, COMPACT HABIT
• Oranzhevaja = PI 617612 (2538.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1997
  - Traits: EARLY RIPE
• Orcas = PI 541537 (2206.002) - Pyrus communis L.
  - Pedigree: Chance seedling discovered on Eastsound, Orcas Island
  - Virus Biological Assays - Negative: PV-2002
• Orel No. 15 = PI 541239 (433.002) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: FIRE BLIGHT RESISTANT, EARLY RIPE, COLD HARDY, Blooms with Bosc, HEIRLOOM
• Orient = PI 541954 (434.007) - Pyrus hybrid
  - Pedigree: P. communis x Chinese species
  - Virus Biological Assays - Negative: MM-1997 NP-1990 PV-1989
  - Traits: FIRE BLIGHT RESISTANT, LOW CHILL 680 hrs, POLYPLOID (3x flow cytometry 2013)
• Orlovskaja Zolotistaja = PI 617610 (2536.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1999 NP-1999 PV-2002
• Osenniaja Jakovleva = PI 617676 (2621.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-2003 PV-2001
• Ottawa 291 [O-291] = PI 541546 (2272.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1991
• Ottawa 291 [O-291] = PI 617630 (2560.001) - Pyrus communis L.
  - Pedigree: Winter Nellis x Bartlett
  - Virus Biological Assays - Negative: NP-1996 PV-1996
• P-12 fire blight resistant rootstock = PI 541294 (715.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1987 PV-1990
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK, SCAB RESISTANT
• P-18 (Oregon 18) fire blight resistant rootstock = PI 541295 (716.001) - Pyrus communis ssp. pyraster (L.) Ehrh. - VIRUS INFECTED
  - Pedigree: Open-pollinated French P. communis seedling selection
  - Virus Biological Assays - Positive: B13-1983 P.Crassane-1983 Vein Yellows-1985
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• P-61 fire blight resistant rootstock = PI 541429 (1374.004) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: MM-1996 NP-1995 PV-1995
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• P-70 fire blight resistant rootstock = PI 541296 (722.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1990 PV-1989, Uncertain: MM-2001
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK, Blooms with Bartlett
• P-79 fire blight resistant rootstock = PI 541297 (723.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: MM-2001 NP-1990
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• P-79 x P. betulifolia = PI 541780 (1348.001) - Pyrus hybrid
  - Pedigree: P-79 x P. betulaefolia seedling selection
  - Virus Biological Assays - Negative: B13-1983 M.micromalus-1996 N.Poiteau-1988 P.Crassane-1985 Pyronia-1988
  - Traits: ROOTSTOCK
• P-87 fire blight resistant rootstock = PI 541298 (724.001) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1988, Uncertain: M.micromalus-2001
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• Packham Late = PI 541316 (435.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1988 M.micromalus-1996 N.Poiteau-1985 Pyronia-1984 V.Crab-1989
  - Traits: VERY LATE RIPE
• Packham's Triumph = PI 280405 (436.001) - Pyrus communis L.
  - Pedigree: Uvedale St. Germain x Bartlett
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-2003 P.Crassane-1984 Pyronia-1984 V.Crab-1991
  - Traits: LATE RIPE, FIRE BLIGHT SUSCEPTIBLE, DIPLOID (flow cytometry), HEIRLOOM
• Pai Li (Beijing White Pear) = PI 541998 (439.001) - Pyrus ussuriensis Maxim.
  - Pedigree: old selection from Beijing Region
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-2002 N.Poiteau-1988 P.Crassane-1984 Pyronia-1984 V.Crab-1988
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, MILDEW RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry)
• Pamyati Yakoleva = PI 665808 (2858.001) - Pyrus communis L.
• Panajurka = PI 506371 (1677.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987
• Para de Zahar de Bihor = PI 506385 (1663.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987
  - Traits: EARLY RIPE
• Paraow = PI 654929 (2674.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2003
  - Traits: LATE RIPE, LARGE FRUIT, GOOD STORAGE, POLYPLOID (3x flow cytometry 2013)
• Parker = PI 657928 (2921.001) - Pyrus communis hybrid
  - Pedigree: Open pollinated seedling of a Manchurian pear cultivar.
  - Traits: FIRE BLIGHT SUSCEPTIBLE, COLD HARDY
• Parrot = PI 280035 (440.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1992 PV-1992
  - Traits: apparently SELF-FERTILE, HEIRLOOM
• Passe Colmar = PI 541519 (2127.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2001 PV-2001
  - Traits: LATE RIPE, HEIRLOOM
• Passe Crassane = PI 131662 (441.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: TOMRSV-1986
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1984 V.Crab-1989, Uncertain: M.micromalus-2001
  - Traits: VERY LATE RIPE, FIRE BLIGHT SUSCEPTIBLE, VIRUS INDICATOR, COMPACT HABIT, FROST RESISTANT, QUINCE COMPATIBLE, MONOLINIA RESISTANT, HEIRLOOM, DIPLOID (flow cytometry), DNA STANDARD
• Passe Crassane Rouge = PI 131663 (445.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Bud mutation of cv Passe Crassane
  - Virus Lab Assays - Positive: PBCVd-1995 Viroid-2009
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1992
  - Traits: VERY LATE RIPE, FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, COMPACT HABIT
• Patrick Barry (P. Barry) = PI 541240 (446.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Seedling of cultivar Belle Lucrative
  - Virus Biological Assays - Positive: Vein Yellows-1985, Negative: V.Crab-1988
  - Traits: LATE RIPE, HEIRLOOM
• Patten = PI 541241 (447.003) - Pyrus communis L.
  - Pedigree: Orel 15 x Anjou
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: VERY LATE RIPE, LOW CHILL
• Pautalia (=Jubileer D'ar) = PI 392321 (448.002) - Pyrus communis L.
  - Pedigree: Green Magdelene x Beurre Giffard
  - Virus Biological Assays - Negative: MM-1999 NP-1990 PV-1989 VC-1989
  - Traits: VERY EARLY RIPE
• Pear from Michurinsk = PI 125404 (2359.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1992 PV-1991
• Pendula = PI 541951 (893.001) - Pyrus salicifolia Pallas - VIRUS INFECTED
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Positive: N.Poiteau-1985, Negative: M.micromalus-2003
  - Traits: ORNAMENTAL, DIPLOID (flow cytometry), DNA Standard
• Perazola = PI 541465 (1700.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1996 NP-1992 PV-1992
  - Traits: VERY EARLY RIPE
• Pertusati = PI 617636 (2566.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2002 PV-1999
• Peter = PI 617631 (2561.001) - Pyrus ussuriensis hybrid
  - Pedigree: Pyrus ussuriensis x Aspa
  - Virus Biological Assays - Negative: NP-1996 PV-1999
  - Traits: COLD HARDY
• Petersbirne = PI 130991 (1133.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1984 Pyronia-1985
  - Traits: HEIRLOOM, FIRE BLIGHT RESISTANT
• Petit Blanquet = PI 541242 (451.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1993 PV-1991
  - Traits: EARLY RIPE, HEIRLOOM
• Petit Muscat = PI 277526 (450.003) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1990
  - Traits: ANCIENT, VERY EARLY RIPE, HEIRLOOM
• Petit Muscat = PI 277526 (450.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2002 PV-2001
  - Traits: ANCIENT, VERY EARLY RIPE, HEIRLOOM
• Petite Rousselet = PI 132284 (1134.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: HEIRLOOM
• Petre = PI 638023 (2833.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Grown from the seed of a "fine butter pear" Seed received by John Bartrum in 1735 from London.
  - Virus Biological Assays - Positive: NP-2009 PV-2009
  - Traits: POLYPLOID (3x flow cytometry 2013)
• Petrovka = PI 506374 (1688.002) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-1993 PV-1995
• Petrovski = PI 617632 (2562.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-1996 PV-1996
• Phileson = PI 312505 (452.002) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Kurskaya x Flemish Beauty
  - Virus Biological Assays - Positive: NP-1987, Negative: PV-1987
• Philip = PI 641283 (2738.001) - Pyrus communis L.
  - Pedigree: Pyrus ussuriensis x Aspa
  - Virus Biological Assays - Negative: PV-2003, Uncertain: NP-2003
  - Traits: COLD HARDY
• Pierre Corneille = PI 541521 (2129.002) - Pyrus communis L.
  - Pedigree: Buerre Diel x Doyenne du Comice
  - Virus Biological Assays - Negative: NP-2001 PV-2001
  - Traits: QUINCE COMPATIBLE, HEIRLOOM
• Pineapple = PI 617561 (2384.002) - Pyrus hybrid
  - Pedigree: Unknown seedling may have been brought from China in the 1850s. Named Pineapple by Georgia Exp. Station.
  - Traits: FIRE BLIGHT RESISTANT, LOW CHILL 360 hrs, DIPLOID (flow cytometry 2014)
• Ping Ding Li = PI 541999 (453.003) - Pyrus ×bretschneideri Rehder
  - Pedigree: P. ussuriensis x P. phaeocarpa
  - Virus Biological Assays - Negative: NP-1991 PV-1989
• Ping Guo Li [Pingo Li] = PI 267863 (455.002) - Pyrus ussuriensis Maxim.
  - Pedigree: old selection from Jiling Province
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1991 PV-1991
  - Traits: LATE RIPE, MILDEW RESISTANT, DIPLOID (flow cytometry)
• Pioneer No. 3 = PI 541549 (2278.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: PV-2002, Uncertain: NP-2003
  - Traits: COLD HARDY
• Pitmaston Duchess (3x) = PI 541243 (456.002) - Pyrus communis L.
  - Pedigree: Duchess d'Angouleme x Glou Marceau
  - Virus Biological Assays - Negative: NP-1987 PV-1987
  - Traits: VERY LARGE FRUIT, POLYPLOID (3x flow cytometry 2007), HEIRLOOM
• Pitoma Slanopadja = PI 483405 (1554.001) - Pyrus communis x amygdaliformis
  - Pedigree: Pyrus communis/P. amygdaliformis
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1997 N.Poiteau-1985 Pyronia-1985 V.Crab-1992
  - Traits: LATE RIPE, POLYPLOID (3x flow cytometry 2013)
• Placer = PI 617557 (2374.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1992 PV-1991, Uncertain: MM-2001
  - Traits: RED SKIN
• Poire d'Anis = PI 617644 (2575.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-2001 NP-1996 PV-1999
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Poirier Fleurissant Tard = PI 541551 (2280.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2000 NP-1990 PV-1990
  - Traits: LATE BLOOM, SCAB RESISTANT, DIPLOID (flow cytometry)
• Poite Berringer = PI 617538 (2339.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1998 NP-1999 PV-1998
  - Traits: DIPLOID (flow cytometry 2012)
• Pollwiller Pear = PI 256000 (28.001) - ×Sorbopyrus auricularis (Knoop) C. Schneider
  - Pedigree: Pyrus communis x Sorbus aria
  - Traits: EDIBLE, SMALL FRUIT, ORNAMENTAL, probably = Decaisne's Pyrus bollwiller
• Pontotoc = PI 541726 (1135.001) - Pyrus hybrid
  - Pedigree: P. communis x P. ussuriensis or P. pyrifolia
  - Virus Biological Assays - Negative: Bosc-1988 N.Poiteau-1985 P.Crassane-1985 Pyronia-1991
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, LOW CHILL, DIPLOID (flow cytometry 2012)
• Pope [Bonner] = PI 617670 (2615.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Biological Assays - Positive: PV-2002 RING-1999
  - Traits: LATE RIPE, SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Porporata = PI 324135 (457.002) - Pyrus communis L.
  - Pedigree: Butirra Hardy x President Roosevelt
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: DIPLOID (flow cytometry 2012)
• Potomac = PI 617594 (2518.001) - Pyrus communis L.
  - Pedigree: Moonglow x Beurre d'Anjou
  - Virus Biological Assays - Negative: NP-2001 PV-1997
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry)
• Pound = PI 131232 (458.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-1988 P.Crassane-1984 Pyronia-1984
  - Traits: VERY LATE RIPE, VERY LARGE FRUIT, ANCIENT, HEIRLOOM, POLYPLOID (3x flow cytometry 2013)
• Poznica = PI 506388 (1664.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987 V.Crab-1991
  - Traits: DIPLOID (flow cytometry 2012)
• Prague No. 1 (3x) = PI 483379 (1533.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: Bosc-1987 M.micromalus-1996 N.Poiteau-1985 Pyronia-1985 V.Crab-1992
  - Traits: POLYPLOID (3x flow cytometry 2008)
• Prague No. 2 = PI 483380 (1534.002) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-1988 PV-1991
  - Traits: LATE RIPE, DIPLOID (flow cytometry)
• Precoce de Trevoux = PI 279338 (459.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: Vein Yellows-1985, Negative: Bosc-1988 V.Crab-1988
  - Traits: FROST RESISTANT, MONOLINIA RESISTANT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Precoce de Trevoux = PI 541244 (461.003) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1990 PV-1987
  - Traits: FROST RESISTANT, MONOLINIA RESISTANT, DIPLOID (flow cytometry), HEIRLOOM
• Premices de Maria Lesueur = PI 617585 (2506.002) - Pyrus communis L. - VIRUS INFECTED
  - Virus Lab Assays - Positive: PBCVd-2000
  - Virus Biological Assays - Negative: A20-2004
  - Traits: DIPLOID (flow cytometry 2012)
• President Deviolaine = PI 541517 (2125.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: N.Poiteau-1992 Vein Yellows-1992
  - Traits: DIPLOID (flow cytometry 2012)
• President Drouard = PI 279339 (462.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Seedling of cultivar Butirra Napoleon
  - Virus Biological Assays - Positive: Vein Yellows-1985, Negative: Bosc-1989
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• President Drouard [Drousod] = PI 657912 (2341.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1993 PV-1991
  - Traits: HEIRLOOM
• President Hardy = PI 137078 (464.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: DIPLOID (flow cytometry 2012)
• President Heron = PI 322036 (465.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1990
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• President Loubet = PI 541245 (466.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: DIPLOID (flow cytometry 2012)
• President Loutreul = PI 131135 (1136.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987 VC-1988
  - Traits: DIPLOID (flow cytometry 2012)
• President Osmonville 40 = PI 264197 (467.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1990
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Princess = PI 541545 (2271.001) - Pyrus communis L.
  - Pedigree: o.p. seedling Louise Bonne of Jersey
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Professor Grosdemage = PI 541246 (468.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: PV-1999
  - Traits: SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Professor Molon = PI 131743 (2367.001) - Pyrus communis (hybrid?)
  - Pedigree: Le Lectier x Passe Crassane
  - Virus Biological Assays - Negative: MM-2001 NP-1992 PV-1991
  - Traits: DIPLOID (flow cytometry 2012)
• Progres = PI 392322 (469.003) - Pyrus communis L.
  - Pedigree: Beurre Giffard x Green Magdelene
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: VERY EARLY RIPE, SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Projnjaca = PI 483400 (1550.001) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1985 Pyronia-1985 V.Crab-1992, Uncertain: Bosc-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Pulteney = PI 541247 (470.002) - Pyrus communis L.
  - Pedigree: Winter Nelis x Russet Bartlett
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: FIRE BLIGHT SUSCEPTIBLE, DIPLOID (flow cytometry 2012)
• Pyronia veitchii (Pyrus x Cydonia) = CIGC 12 (12.001) - ×Pyronia veitchii
  - Pedigree: C. oblonga x P. communis
  - Virus Biological Assays - Uncertain tests: NP
  - Traits: VIRUS INDICATOR
• Pyronia veitchii (Pyrus x Cydonia) IRP 82-1 = CIGC 9 (9.001) - ×Pyronia veitchii
  - Pedigree: Pyrus communis x Cydonia oblonga
  - Virus Biological Assays - Tested negative on: NP PC PV
  - Traits: VIRUS INDICATOR, COLD HARDY
• Pyronia veitchii var. luxemburgiana = CIGC 13 (13.001) - ×Pyronia veitchii var. luxemburgiana
  - Pedigree: Uncertain
  - Virus Biological Assays - Tested negative on: NP
  - Traits: VIRUS INDICATOR
• Quave = PI 617672 (2617.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Biological Assays - Positive: RING-1999
  - Traits: DIPLOID (flow cytometry 2012)
• RX 196 = PI 279936 (504.001) - Pyrus communis L.
  - Pedigree: Clairgeau x Williams
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1989 P.Crassane-1984 Pyronia-1984 V.Crab-1988
  - Traits: DIPLOID (flow cytometry 2012)
• RX 226 = PI 279937 (505.002) - Pyrus communis L.
  - Pedigree: Buerre Hardy x Passe Crassane
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: DIPLOID (flow cytometry 2012)
• RX 274 = PI 279940 (507.002) - Pyrus communis L.
  - Pedigree: Seedling selection of cultivar Clairgeau
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: DIPLOID (flow cytometry 2012)
• Radchinskaia = PI 292379 (471.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1992
  - Traits: COLD HARDY, DIPLOID (flow cytometry 2012)
• Ranniaia Mleevskaia (Mleevskaya Rannaya) = PI 292377 (472.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1993 Pyronia-1993
  - Traits: SUMMER PEAR, DIPLOID (flow cytometry 2012)
• Reale = PI 665799 (2692.003) - Pyrus communis L.
  - Traits: POLYPLOID (3x flow cytometry 2013)
• Red Pear = PI 541317 (474.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-1988 P.Crassane-1984 Pyronia-1991 V.Crab-1992
  - Traits: PERRY ANCIENT, LATE BLOOM, SWEET (LOW ACID, LOW TANNIN), HEIRLOOM, DIPLOID (flow cytometry 2012)
• Redspire (P. calleryana) = PI 541104 (2185.001) - Pyrus calleryana Decne.
  - Pedigree: Seedling selection from cultivar Bradford
  - Virus Biological Assays - Negative: MM-1997 NP-1989 PV-1989
  - Traits: RED SKIN, ORNAMENTAL, LOW CHILL, DIPLOID (flow cytometry 2012)
• Reimer's Hybrid = PI 541250 (483.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: DIPLOID (flow cytometry 2012)
• Reliance = PI 541251 (484.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: SPECIALTY, ROUND FRUIT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Remy Chatenay = PI 541550 (2279.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Republica = PI 617546 (2357.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: DIPLOID (flow cytometry 2012)
• Rescue = PI 541538 (2207.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1989, Uncertain: PV-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Richard Peters = PI 541715 (486.004) - Pyrus hybrid
  - Pedigree: Kieffer seedling
  - Virus Biological Assays - Negative: NP-1993 PV-1991
  - Traits: FIRE BLIGHT RESISTANT, LOW CHILL, DIPLOID (flow cytometry 2012)
• Riehl Best = PI 665742 (2926.001) - Pyrus communis L.
  - Pedigree: Discovered by Edwin H. Riehl, Godfrey, Illinois. Introduced by Stark Brothers, Louisiana, Missouri in 1912.
  - Traits: FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry 2012)
• Rising Star (3x) = PI 617665 (2610.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: PV-2000
  - Traits: SCAB RESISTANT, POLYPLOID (3x flow cytometry 2013)
• Rocha = PI 286384 (487.001) - Pyrus communis L.
  - Virus Lab Assays - Uncertain: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-2003 N.Poiteau-1988 P.Crassane-1984 Pyronia-1984 V.Crab-1988
  - Traits: LOW CHILL 550 hrs, DIPLOID (flow cytometry), apparently SELF-FERTILE (PARTHENOCARPIC)
• Rogue Red = PI 541252 (488.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Comice x (Seckel x Farmingdale sdlg. 122)
  - Virus Biological Assays - Positive: Vein Yellows-1985, Negative: Bosc-1989 V.Crab-1988
  - Traits: RED SKIN, QUINCE COMPATIBLE, WINTER PEAR, DIPLOID (flow cytometry)
• Roi Charles de Wurttemberg = PI 541253 (489.002) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Beurre Clairgeau
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: LATE RIPE, HEIRLOOM, MONOLINIA RESISTANT, DIPLOID (flow cytometry 2012)
• Romania 138-31-38 = PI 541967 (2275.001) - Pyrus communis L.
  - Pedigree: Cultivar selection
  - Virus Biological Assays - Negative: NP-1990 PV-1990
  - Traits: DIPLOID (flow cytometry 2012)
• Romania 138-5-22 = PI 541968 (2276.001) - Pyrus communis L.
  - Pedigree: Cultivar selection
  - Virus Biological Assays - Negative: NP-1990 PV-1993
  - Traits: SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Romania 14/109 F2- F-2 = PI 665775 (2755.001) - Pyrus communis L.
  - Traits: DIPLOID (flow cytometry 2012)
• Romania 14/125 F2-3-131 = PI 654914 (2438.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1996 NP-1993 PV-1991
  - Traits: VERY LATE RIPE, DIPLOID (flow cytometry 2012)
• Romania 17-4/5-32 = PI 541969 (2277.001) - Pyrus communis L.
  - Pedigree: Cultivar selection
  - Virus Biological Assays - Negative: NP-1990 PV-1991
  - Traits: DIPLOID (flow cytometry 2012)
• Romania 3/35 FE-12-139 = PI 654916 (2441.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Lab Assays - Positive: PBCVd-2001
  - Virus Biological Assays - Negative: MM-1998 NP-1992 PV-1991
  - Traits: SCAB RESISTANT
• Romania 4/115 F2-8-194 = PI 654915 (2439.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-1996 NP-1992 PV-1992
  - Traits: DIPLOID (flow cytometry 2012)
• Romania Perry Pear = PI 506378 (1670.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: M.micromalus-1999, Negative: N.Poiteau-1987 Pyronia-1987 V.Crab-1992
  - Traits: PERRY, DIPLOID (flow cytometry 2012)
• Rombough Mite Resistant Pear #1 = PI 617593 (2517.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: PV-1998, Negative: NP-1997
• Roosevelt = PI 506372 (1687.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2001 PV-2000
  - Traits: VERY LARGE FRUIT, DIPLOID (flow cytometry 2012)
• Rosee de Juillet = PI 541254 (491.004) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: EARLY RIPE, DIPLOID (flow cytometry 2012)
• Rosii Untoase = PI 502174 (1634.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1988 Pyronia-1989 V.Crab-1991
  - Traits: DIPLOID (flow cytometry 2012)
• Rosu Tamiios de Bristrita = PI 352658 (492.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1996 N.Poiteau-1988 P.Crassane-1984 Pyronia-1984
  - Traits: DIPLOID (flow cytometry 2012)
• Rotkottig Frau Ostergotland = PI 295094 (494.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: RED FLESH, EARLY RIPE, DIPLOID (flow cytometry 2012)
• Rotkottig Frau Ostergotland = PI 295094 (495.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PNRSV-1987
  - Virus Biological Assays - Negative: Bosc-1988 V.Crab-1988
  - Traits: RED FLESH, EARLY RIPE
• Rousselet de Reims = PI 541256 (496.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Lab Assays - Negative: APMV-1987 PNRSV-1987
  - Virus Biological Assays - Positive: N.Poiteau-1993 Pyronia-1984, Negative: V.Crab-1988
  - Traits: ANCIENT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Rousselet of Stuttgart x Dr. Jules Guyot No. II = PI 337444 (497.001) - Pyrus communis L.
  - Pedigree: R. Shtutgartskii x Dr. J. Gujo
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1996 N.Poiteau-1987 P.Crassane-1984 Pyronia-1989
• Rousselet of Stuttgart x Dr. Jules Guyot No. IX = PI 337448 (501.001) - Pyrus communis L.
  - Pedigree: R. Shtutgartskii x Dr. J. Gujo
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1985 Pyronia-1985 V.Crab-1991
• Rousselet of Stuttgart x Dr. Jules Guyot No. V = PI 337445 (498.001) - Pyrus communis L.
  - Pedigree: R. Shtutgartskii x Dr. J. Gujo
  - Virus Biological Assays - Negative: Bosc-1987 M.micromalus-1997 N.Poiteau-2003 P.Crassane-1984 Pyronia-1984
  - Traits: DIPLOID (flow cytometry 2012)
• Royale Vendee = PI 541257 (502.003) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: VERY LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• SIM 103-1 - Canada = PI 654941 (2752.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-2003
  - Traits: DIPLOID (flow cytometry 2012)
• SIM 117-7 (Alberta, Canada) = PI 654962 (2851.001) - Pyrus communis L.
  - Traits: DIPLOID (flow cytometry 2012)
• Saafaranja = PI 502166 (1626.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1988, Uncertain: M.micromalus-2001
  - Traits: DIPLOID (flow cytometry 2012)
• Saarli 86-1 - Turkmenistan = PI 654954 (2775.001) - Pyrus sp.
  - Traits: DIPLOID (flow cytometry 2012)
• Saint Andre = PI 541259 (508.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Positive: P.Crassane-1984, Negative: Bosc-1989 V.Crab-1988
  - Traits: FIRE BLIGHT RESISTANT, QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Saint Ghislain = PI 541260 (509.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: Vein Yellows-1985, Negative: Bosc-1988
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Saint Gilles = PI 131136 (1141.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1990 PV-1995
  - Traits: DIPLOID (flow cytometry)
• Sampionka = PI 654963 (2864.001) - Pyrus communis L.
  - Pedigree: President Drouard x Bartlett
  - Traits: DIPLOID, QUINCE COMPATIBLE, FRUIT LARGE, MID-SEASON
• Samy's Estate = PI 278729 (510.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: LATE RIPE, LOW CHILL, DIPLOID (flow cytometry 2012)
• Sanguinole = PI 277529 (512.004) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1990 PV-1989
  - Traits: RED FLESH, ANCIENT, EARLY RIPE, DIPLOID (flow cytometry), HEIRLOOM
• Santa Claus = PI 215329 (513.003) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: QUINCE COMPATIBLE, LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Santa Maria Morettini = PI 295095 (514.005) - Pyrus communis L.
  - Pedigree: Bartlett x Coscia
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1990 PV-1989
  - Traits: DIPLOID (flow cytometry)
• Saprani I (P. pyrifolia) = PI 506375 (1686.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-1987 Pyronia-1987 V.Crab-1992
  - Traits: ROOTSTOCK, DIPLOID (flow cytometry 2012)
• Saprani II = PI 506376 (1673.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987
  - Traits: ROOTSTOCK, DIPLOID (flow cytometry 2012)
• Sarajka = PI 502167 (1627.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1988
  - Traits: DIPLOID (flow cytometry 2012)
• Sarteau Rogue = PI 654940 (2741.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: PV-2003
  - Traits: DIPLOID (flow cytometry 2012)
• Sauvignac = PI 657929 (2922.001) - Pyrus communis L.
  - Traits: COLD HARDY, DIPLOID (flow cytometry 2012)
• Sbkta (P. elaeagrifolia) = PI 502179 (1639.001) - Pyrus hybrid
  - Pedigree: P. communis x P. nivalis hybrid
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1998 N.Poiteau-2003 Pyronia-1988 V.Crab-1991
  - Traits: ROOTSTOCK, DIPLOID (flow cytometry)
• Schweizer Wasserbirne (3x) = PI 541261 (515.002) - Pyrus communis L. - VIRUS INFECTED
  - Virus Lab Assays - Positive: ASPV-2010, Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2003 NP-1989 PV-1987
  - Traits: PERRY, SCAB RESISTANT, POLYPLOID (3x flow cytometry 2008), HEIRLOOM
• Scipiona = PI 286220 (516.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2003 NP-1989 PV-1989
  - Traits: LATE RIPE, DIPLOID (flow cytometry), HEIRLOOM
• Seckel = PI 541262 (519.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: N.Poiteau-2003 P.Crassane-1984 Pyronia-1985 V.Crab-1992, Uncertain: M.micromalus-2003
  - Traits: FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry), apparently SELF-FERTILE, HEIRLOOM, CURATOR CHOICE
• Seigyoku = PI 228017 (520.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Nijiseiki x Chojuro
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1987 M.micromalus-2002 Pyronia-1988 V.Crab-1988
  - Traits: FIRE BLIGHT SUSCEPTIBLE, SCAB RESISTANT, LARGE FRUIT, DIPLOID (flow cytometry)
• Senateur Belle = PI 541263 (521.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Serbia Hybrid IV/2 = PI 665790 (2861.001) - Pyrus hybrid
  - Traits: VERY EARLY RIPE, SMALL
• Seuri Li = PI 541904 (1173.002) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1990 PV-1991
  - Traits: FIRE BLIGHT RESISTANT, MILDEW RESISTANT, DIPLOID (flow cytometry)
• Seuri Li [Seu Ri] = PI 307497 (525.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985
  - Traits: FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry 2012)
• Severyanka Kzasroshokaya = PI 654957 (2779.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2003
  - Traits: DIPLOID (flow cytometry 2012)
• Shakarok = PI 665802 (2877.001) - Pyrus communis L.
  - Traits: DIPLOID (flow cytometry 2012)
• Shannon (=Grand Champion) = PI 638017 (2827.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-2009 PV-2009
  - Traits: DIPLOID (flow cytometry 2012)
• Sheldon = PI 541503 (2107.002) - Pyrus communis L.
  - Pedigree: seedling selection
  - Virus Biological Assays - Negative: NP-2003 PV-1999
  - Traits: FIRE BLIGHT SUSCEPTIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Shi Hua Li seedling = PI 541813 (2034.001) - Pyrus ussuriensis Maxim.
  - Pedigree: Seedling selection from OP seed of cultivar Shi-Hua-Li
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1993
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• Shian-Sui Li = PI 665784 (2854.001) - Pyrus ×bretschneideri Rehder
  - Traits: DIPLOID (flow cytometry 2012)
• Shin Li = PI 617663 (2608.001) - Pyrus pyrifolia (Burm. f.) Nakai - VIRUS INFECTED
  - Pedigree: Kikusui x Tse Li
  - Virus Biological Assays - Positive: NP-2002 PV-2002
  - Traits: SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Shinsei = PI 665797 (2857.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Traits: DIPLOID (flow cytometry 2012)
• Shinseiho = PI 352638 (527.002) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Suisei x Shinko
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: DIPLOID (flow cytometry 2012)
• Shinseiki = PI 224087 (528.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Nijiesiki x Chojuro
  - Virus Lab Assays - Negative: APMV-1987 PBCVd-2000 PNRSV-1987
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1988, Uncertain: M.micromalus-2003
  - Traits: BLACK SPOT RESISTANT, SCAB RESISTANT, COLD HARDY, DIPLOID (flow cytometry)
• Shinsui = PI 352636 (529.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Kikusui x Kimizukawase
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: CURATOR CHOICE, EARLY RIPE, DIPLOID (flow cytometry 2012)
• Shipova = PI 260199 (19.001) - ×Sorbopyrus auricularis var. bulbiformis
  - Pedigree: Pyrus communis x Sorbus aria
  - Traits: EDIBLE, LARGE FRUIT
• Shoghori II = PI 654946 (2758.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: PV-2003, Uncertain: NP-2004
  - Traits: LATE BLOOM, LONG STORAGE, DIPLOID (flow cytometry 2012)
• Shu Li = PI 132103 (531.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985
  - Traits: PERRY POTENTIAL, DIPLOID (flow cytometry 2012)
• Sidi Bou Ali No 3 - Tunisia = PI 665777 (2631.002) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Local cultivar from Sidi Bou Ali, Tunisia
  - Virus Biological Assays - Positive: MM-2003, Negative: NP-2004
  - Traits: LOW CHILL, DIPLOID (flow cytometry 2012)
• Sierra = PI 541348 (1142.002) - Pyrus communis L.
  - Pedigree: Bartlett x Marguerite Marillat
  - Virus Biological Assays - Negative: NP-1990 PV-1995
  - Traits: FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, DIPLOID (flow cytometry 2012)
• Siljka = PI 654912 (2434.002) - Pyrus sp.
  - Traits: POLYPLOID (3x flow cytometry 2013)
• Simon = PI 617633 (2563.001) - Pyrus hybrid
  - Pedigree: Pyrus ussuriensis x Aspa
  - Virus Biological Assays - Negative: NP-1996 PV-1996
  - Traits: COLD HARDY, DIPLOID (flow cytometry 2012)
• Singo (=Niitaka) = PI 654919 (2447.002) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: NP-2003
  - Traits: FIRE BLIGHT RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Sion Szu Mi = PI 289525 (532.002) - Pyrus sp.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2003 NP-1989 PV-1987
  - Traits: DIPLOID (flow cytometry)
• Sirrine = PI 541349 (1143.001) - Pyrus communis L.
  - Pedigree: OP seedling of cultivar Bartlett
  - Virus Biological Assays - Negative: Bosc-1987 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985
  - Traits: DIPLOID (flow cytometry 2012)
• Sivaganga Estate = PI 278731 (533.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: LOW CHILL, DIPLOID (flow cytometry 2012)
• Sladky = PI 127716 (534.001) - Pyrus hybrid
  - Pedigree: Russian sand pear x Lincoln
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1988, Uncertain: Bosc-1989
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Smederevka = PI 483396 (1548.001) - Pyrus communis ssp. pyraster (L.) Ehrh.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1985 Pyronia-1985 V.Crab-1992, Uncertain: Bosc-1989
  - Traits: LATE RIPE, VERY LARGE FRUIT, POLYPLOID (3x flow cytometry 2012)
• Smith = PI 541716 (535.001) - Pyrus hybrid
  - Pedigree: P. pyrifolia hybrid
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: DIPLOID (flow cytometry 2012)
• Smokvarka = PI 502176 (34.001) - ×Sorbopyrus auricularis var. bulbiformis
  - Traits: PSYLLA RESISTANT, EDIBLE LARGE FRUIT, COLD HARDY
• Snyder = PI 541264 (536.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Sodak = PI 541727 (1144.001) - Pyrus hybrid
  - Pedigree: P. ussuriensis x Margueritte Marillat
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1984 Pyronia-1985, Uncertain: M.micromalus-2001
  - Traits: FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry 2012)
• Solanka = PI 282978 (537.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1990 V.Crab-1988
  - Traits: DIPLOID (flow cytometry 2012)
• Soldat Laboureur = PI 617640 (2571.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: RING-1996 VY-1996
  - Traits: DIPLOID (flow cytometry 2012)
• Soldat Laboureur = PI 617640 (2571.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1999 PV-1999
  - Traits: DIPLOID (flow cytometry 2012)
• Sorbopyrus 'Baciu 1' = PI 506381 (35.001) - ×Sorbopyrus
  - Traits: EDIBLE, MEDIUM FRUIT, POLYPLOID (3x flow cytometry 2012)
• Sorbopyrus 'Baciu 2' = PI 506382 (36.001) - ×Sorbopyrus
  - Traits: EDIBLE, MEDIUM FRUIT, LATE BLOOM, POLYPLOID (3x flow cytometry 2012)
• Sorbopyrus 'Bulbiformis' = PI 318839 (21.001) - ×Sorbopyrus auricularis var. bulbiformis
  - Pedigree: Uncertain
  - Traits: EDIBLE, LARGE FRUIT
• Sotoorihime = PI 506363 (1666.001) - Pyrus ussuriensis Maxim.
  - Pedigree: Developed from native P. hondoensis
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: N.Poiteau-1988 Pyronia-1988, Uncertain: M.micromalus-2003
  - Traits: LATE RIPE, ANCIENT, HEIRLOOM , DIPLOID (flow cytometry)
• South Dakota E-31 = PI 541812 (1702.001) - Pyrus hybrid
  - Pedigree: Uncertain, probably a hybrid
  - Virus Lab Assays - Negative: TOMRSV-1988
  - Virus Biological Assays - Negative: M.micromalus-2001 N.Poiteau-1988 Pyronia-1988 V.Crab-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Southern Bartlett = PI 617603 (2528.001) - Pyrus communis L.
  - Pedigree: Bartlett sport
  - Virus Biological Assays - Negative: NP-1999 PV-1997
  - Traits: LOW CHILL, DIPLOID (flow cytometry 2012)
• Southern King = PI 665751 (2942.001) - Pyrus hybrid
  - Traits: DIPLOID (flow cytometry 2012)
• Southworth = PI 541350 (1145.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1991 PV-1991
  - Traits: FIRE BLIGHT RESISTANT, COLD HARDY, apparently SELF-FERTILE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Souvenir du Congress = PI 617637 (2567.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: RING-1996, Uncertain: NP-1996
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Souvenir du Congress = PI 617637 (2567.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1999 PV-1999
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Spadona di Salerno = PI 541300 (1645.001) - Pyrus communis L.
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: N.Poiteau-1993
  - Traits: LOW CHILL, DIPLOID (flow cytometry 2012)
• Spalding = PI 617548 (2362.001) - Pyrus hybrid
  - Pedigree: Unknown, although one parent is probably cv 'Pineapple'
  - Virus Biological Assays - Negative: MM-2001 NP-1992 PV-1991
  - Traits: LOW CHILL, FIRE BLIGHT RESISTANT, apparently SELF-FERTILE, DIPLOID (flow cytometry 2012)
• Spartlet = PI 541351 (1146.001) - Pyrus communis L.
  - Pedigree: Chance Bartlett seedling
  - Virus Biological Assays - Negative: Bosc-1988 N.Poiteau-1985 Pyronia-1990
  - Traits: VERY LARGE FRUIT, DIPLOID (flow cytometry 2012)
• Spin Tangoo (white pear) = PI 665793 (2660.002) - Pyrus pyrifolia hybrid
  - Traits: SMALL FRUIT, DIPLOID (flow cytometry 2012)
• Spina Carpi (3x) = PI 541558 (2333.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1992 PV-1991
  - Traits: LATE RIPE, ANCIENT, PSYLLA RESISTANT, POLYPLOID (3x flow cytometry 2008), HEIRLOOM
• Stacey = PI 617529 (2297.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: MM-2001 NP-1992 PV-1992
  - Traits: COLD HARDY, EARLY RIPE, DIPLOID (flow cytometry 2012)
• Stark Jumbo (Johnson cultivar) = PI 541265 (545.003) - Pyrus communis L.
  - Pedigree: Bartlett bud mutation
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: DIPLOID (flow cytometry 2012)
• Stout = PI 541266 (548.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Stuttgarter-Geishirtle (= Zuckerbirne) = PI 541444 (1516.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: CUTE LITTLE FRUITS, DIPLOID (flow cytometry 2012)
• Suan Li = PI 44151 (1148.001) - Pyrus ussuriensis Maxim.
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1984 Pyronia-1988
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry 2012)
• Success de la Meilleraye = PI 541268 (550.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1993 PV-1991
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• Sucre Verte = PI 541269 (553.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: FIRE BLIGHT RESISTANT, ANCIENT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Sucree Rosee (Soucher 53-) = PI 224553 (552.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: LATE RIPE, POLYPLOID (3x flow cytometry 2013)
• Sucree de Montlucon = PI 295096 (551.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: LATE RIPE, QUINCE COMPATIBLE, HEIRLOOM, POLYPLOID (3x flow cytometry 2013)
• Sudduth (=Burkett) = PI 142477 (1149.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: FIRE BLIGHT RESISTANT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Sugar Top = PI 541353 (1150.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: Vein Yellows-1985, Uncertain: Pyronia-2002
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Sugar Top = PI 541353 (1150.005) - Pyrus communis L.
  - Virus Biological Assays - Negative: PV-2000, Uncertain: NP-2001
  - Traits: HEIRLOOM
• Suisei = PI 352637 (554.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Kikusui x Yakumo
  - Virus Biological Assays - Negative: Bosc-1989 Pyronia-1989 V.Crab-1988
  - Traits: BLACK SPOT RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Suishu = PI 352645 (555.001) - Pyrus pyrifolia (Burm. f.) Nakai - VIRUS INFECTED
  - Virus Biological Assays - Positive: Pyronia-1991, Negative: Bosc-1989 N.Poiteau-1988 P.Crassane-1985
  - Traits: DIPLOID (flow cytometry 2012)
• Summer Blood Birne = PI 312507 (556.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: M.micromalus-1997 N.Poiteau-1988 P.Crassane-1984 Pyronia-1988, Uncertain: Bosc-1988
  - Traits: RED FLESH, CURATOR CHOICE, DIPLOID (flow cytometry 2012)
• Summer Muskatel Birne = PI 264698 (557.002) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1992 PV-1987
  - Traits: DIPLOID (flow cytometry)
• Summercrisp = PI 665739 (2328.001) - Pyrus hybrid
  - Pedigree: Unknown, P. communis and ussuriensis suspected in ancestry
  - Virus Biological Assays - Negative: NP-1992 PV-1991
  - Traits: COLD HARDY (fruited in Anchorage), DIPLOID (flow cytometry 2012)
• Surecrop = PI 541354 (1151.002) - Pyrus communis L.
  - Pedigree: Chance seedling of unknown parentage
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• Suzette de Bavay = PI 541270 (559.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1992 P.Crassane-1984, Uncertain: Bosc-1989
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Swiss Bergamotte = PI 541520 (2128.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Variegated sport of Bergamotte Suisse
  - Virus Biological Assays - Positive: NP-1990 PV-1990 VY-1992
  - Traits: POLYPLOID (3x flow cytometry 2012)
• Swiss Bergamotte = PI 541520 (2128.003) - Pyrus communis L.
  - Pedigree: Variegated sport of Bergamotte Suisse
  - Virus Biological Assays - Negative: PV-1999
  - Traits: POLYPLOID (3x flow cytometry 2013)
• Syan Li = PI 654960 (2786.001) - Pyrus ×bretschneideri Rehder
  - Pedigree: Recived from Kazakhstan, where they are used as pear rootstocks. Originated in China.
  - Virus Biological Assays - Negative: NP-2003
  - Traits: ROOTSTOCK, DIPLOID (flow cytometry 2012)
• Szumi = PI 541905 (1174.002) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: NP-1989 PV-1990
  - Traits: SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• TE-1839 (Czech Republic) = PI 665795 (2679.002) - Pyrus communis L.
  - Pedigree: Clapp Favorite x Beurre Bosc
  - Traits: DIPLOID (flow cytometry 2012)
• TE-53-16-55 (Czech Republic) = Q 27589 (2676.003) - Pyrus communis L.
  - Pedigree: Comtesse de Paris x Fondante de Charneu
  - Traits: DIPLOID (flow cytometry 2012)
• Ta Mo Pan = PI 542000 (560.001) - Pyrus ussuriensis Maxim. - VIRUS INFECTED
  - Virus Biological Assays - Positive: P.Crassane-1984, Negative: Bosc-1989 V.Crab-1988
  - Traits: DIPLOID (flow cytometry 2012)
• Ta Suan Li = PI 542001 (561.003) - Pyrus ussuriensis Maxim.
  - Pedigree: old selection from North China
  - Virus Biological Assays - Negative: MM-1996 NP-1995 PV-1995
  - Traits: SCAB RESISTANT, POLYPLOID (3x flow cytometry 2013)
• Tait Dropmore = PI 617634 (2564.001) - Pyrus communis L.
  - Pedigree: Open pollinated seedling of Patten
  - Virus Biological Assays - Negative: NP-1996 PV-1996
  - Traits: COLD HARDY, DIPLOID (flow cytometry 2012)
• Takisha = PI 506386 (1675.003) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-1995 PV-1991, Uncertain: MM-2001
  - Traits: LATE RIPE, SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Talasova Zimni = PI 282979 (563.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• Tamiioasa Robert = PI 352659 (564.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Tamiioase de Calinesti = PI 506383 (1690.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-2003 NP-2003
  - Traits: DIPLOID (flow cytometry 2012)
• Tan Chi II (little pear) - Pakistan = Q 27454 (2672.002) - Pyrus pashia hybrid
  - Virus Biological Assays - Negative: NP-2003
  - Traits: DIPLOID (flow cytometry 2012)
• Tang Li = PI 542024 (1184.001) - Pyrus ussuriensis Maxim. - VIRUS INFECTED
  - Virus Biological Assays - Positive: N.Poiteau-1985, Negative: Bosc-1988 P.Crassane-1984 V.Crab-1988
  - Traits: FIRE BLIGHT RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Tang Li ID? = PI 542024 (1184.002) - Pyrus ussuriensis Maxim.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1990 PV-1991, Uncertain: MM-2003
  - Traits: FIRE BLIGHT RESISTANT, MILDEW RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry)
• Tara Mrut [William Feldman] = PI 654961 (2770.001) - Pyrus sp.
  - Traits: DIPLOID (flow cytometry 2012)
• Tarquin Des Pyrenees = PI 131889 (1153.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Positive: P.Crassane-1984 Pyronia-2002 Vein Yellows-1985, Negative: Bosc-1989 M.micromalus-2003
  - Traits: LATE RIPE, DIPLOID (flow cytometry)
• Tarusa Crimson (=Tamared) = PI 617643 (2574.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: MM-1999 NP-1996 PV-1999
  - Traits: FIRE BLIGHT SUSCEPTIBLE, DIPLOID (flow cytometry 2012)
• Tau Ma Li = PI 541955 (565.001) - Pyrus ussuriensis Maxim.
  - Virus Biological Assays - Negative: Bosc-1988
  - Traits: DIPLOID (flow cytometry 2012)
• Taynton Squash = PI 541271 (567.001) - Pyrus communis L.
  - Pedigree: Very old English cultivar.
  - Virus Biological Assays - Negative: M.micromalus-1999 N.Poiteau-1988 P.Crassane-1984 Pyronia-1988 V.Crab-1992
  - Traits: PERRY, ANCIENT, MEDIUM SHARP (MEDIUM ACID, MEDIUM TANNIN), HEIRLOOM, DIPLOID (flow cytometry 2012)
• Tedrow Beauty = PI 541272 (568.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Tennessee = PI 617601 (2525.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1997 PV-1997, Uncertain: VY-1999
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, LOW CHILL 500 hrs, DIPLOID (flow cytometry 2012)
• Tennosui = PI 665750 (2941.001) - Pyrus hybrid
  - Traits: DIPLOID (flow cytometry 2012)
• Thanksgiving = PI 617661 (2606.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Biological Assays - Positive: PV-2002
  - Traits: VERY LATE RIPE, DIPLOID (flow cytometry 2012)
• Theilersbirne (3x) = PI 483367 (1521.003) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Chance seedling
  - Virus Lab Assays - Positive: ACLSV-2010 PBCVd-2010
  - Virus Biological Assays - Negative: NP-1989 PV-1987 VC-1989
  - Traits: PERRY, HEIRLOOM, POLYPLOID (3x flow cytometry 2013)
• Thomas = PI 617635 (2565.001) - Pyrus hybrid
  - Pedigree: Pyrus ussuriensis x Bartlett
  - Virus Biological Assays - Negative: NP-1996 PV-1996
  - Traits: COLD HARDY, DIPLOID (flow cytometry 2012)
• Thorn = PI 541273 (569.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1988 M.micromalus-2002 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: PERRY, ANCIENT, MEDIUM SHARP (MEDIUM ACID), DIPLOID (flow cytometry), HEIRLOOM
• Thornley = PI 541274 (571.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1990 PV-1991
  - Traits: DIPLOID (flow cytometry 2012)
• Tikvaca = PI 502168 (1628.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PNRSV-1990
  - Virus Biological Assays - Negative: M.micromalus-2001 N.Poiteau-1987 Pyronia-1988
  - Traits: SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Timpurii de Voinsati = PI 352660 (572.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: Vein Yellows-1985, Negative: Bosc-1988
  - Traits: DIPLOID (flow cytometry 2012)
• Timpurii de Voinsati = PI 352660 (572.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1990 VC-1991, Uncertain: MM-2001
  - Traits: DIPLOID (flow cytometry 2012)
• Tioma = PI 134606 (573.002) - Pyrus hybrid
  - Pedigree: P. ussuriensis x Finland Early Yellow
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1989 PV-1987
  - Traits: COLD HARDY, MILDEW RESISTANT, DIPLOID (flow cytometry)
• Tirelemont = PI 295097 (574.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1992 PV-1992
  - Traits: DIPLOID (flow cytometry 2012)
• Tongre (=Durondeau) = PI 295098 (577.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1997 N.Poiteau-1985 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Tonkowietka = PI 260162 (578.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1992 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: HEIRLOOM, EARLY RIPE, DIPLOID (flow cytometry 2012)
• Topka (3x) = PI 483389 (1543.002) - Pyrus communis ssp. pyraster (L.) Ehrh. - VIRUS INFECTED
  - Virus Lab Assays - Positive: PBCVd-2000 Viroid-2009
  - Virus Biological Assays - Negative: A20-2004 MM-1998 NP-1990 PV-1990 VC-1991
  - Traits: LATE RIPE, PSYLLA RESISTANT, POLYPLOID (3x flow cytometry 2007)
• Toulouska pozdni = PI 282980 (579.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• Traci = CIGC 30 (30.001) - ×Pyronia veitchii
• Triomphe de Touraine = PI 137080 (581.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: VERY LATE RIPE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Triomphe de Vienne = PI 541275 (582.003) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Trubchanka Popularnaia = PI 292373 (583.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: DIPLOID (flow cytometry 2012)
• Tsarigradka = PI 189686 (1155.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Tse Li = PI 312509 (584.001) - Pyrus ussuriensis Maxim.
  - Pedigree: local selection from Tse County, Shandong Province complex hybrid of ussuriensis (x bretschneideri)
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-2002 N.Poiteau-1990 P.Crassane-1984 Pyronia-1985 V.Crab-1991
  - Traits: LATE RIPE, ANCIENT, HEIRLOOM , LOW CHILL 500 hrs, FIRE BLIGHT RESISTANT, PSYLLA RESISTANT, DIPLOID (flow cytometry)
• Tse Li type from Li-Shiu = PI 665796 (2852.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Traits: DIPLOID (flow cytometry 2012)
• Tsu Li = PI 542023 (1177.001) - Pyrus ×bretschneideri Rehder - VIRUS INFECTED
  - Virus Biological Assays - Positive: M.micromalus-2003 N.Poiteau-1987, Negative: V.Crab-1988
  - Traits: LATE RIPE, ANCIENT, HEIRLOOM , LOW CHILL 500 hrs, FIRE BLIGHT RESISTANT, PSYLLA RESISTANT, DIPLOID (flow cytometry)
• Tsu Li 1 = PI 665781 (2638.002) - Pyrus ×bretschneideri Rehder
  - Traits: DIPLOID (flow cytometry 2012)
• Tsu Li No. 2 = PI 654922 (2443.002) - Pyrus ×bretschneideri Rehder
  - Traits: ANCIENT, HEIRLOOM , LOW CHILL 500 hrs, FIRE BLIGHT RESISTANT, PSYLLA RESISTANT, DIPLOID (flow cytometry 2012)
• Tu Li = PI 654918 (2446.001) - Pyrus ussuriensis Maxim.
  - Virus Biological Assays - Negative: MM-1998 NP-1992 PV-1991
  - Traits: DIPLOID (flow cytometry 2012)
• Turki = PI 617618 (2544.001) - Pyrus communis L.
  - Pedigree: Local Tunisian cultivar
  - Virus Biological Assays - Negative: NP-2001 PV-1999
  - Traits: LARGE FRUIT, LOW CHILL 250 hrs, POLYPLOID (3x flow cytometry 2013)
• Turnbull (Turnbull Giant) = PI 617642 (2573.001) - Pyrus hybrid
  - Pedigree: Chance Seedling
  - Virus Biological Assays - Negative: MM-1999 NP-1996 PV-1999
  - Traits: LARGE FRUIT, LOW CHILL 250 hrs, SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Tyford Monarch = PI 129642 (1156.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: LATE RIPE, DIPLOID (flow cytometry 2012)
• Tyson = PI 541506 (2332.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1992 PV-1991, Uncertain: MM-2001
  - Traits: FIRE BLIGHT RESISTANT, QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Tzu Ma Li = PI 542007 (1157.002) - Pyrus ussuriensis Maxim.
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: DIPLOID (flow cytometry 2012)
• US 309 = PI 617595 (2519.001) - Pyrus communis L.
  - Pedigree: Michigan-US437(Barseck x Bartlett) x Roi Carlo di Wurtemburg
  - Virus Biological Assays - Negative: NP-1997 PV-1999
  - Traits: PRECOCIOUS, DIPLOID (flow cytometry 2012)
• US 44-3-1 (3x rec.as 6x) = PI 541333 (1082.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PNRSV-1990
  - Virus Biological Assays - Negative: M.micromalus-2001 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1991
  - Traits: POLYPLOID (3x flow cytometry 2013)
• USDA No. 463 = PI 541276 (586.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1988
  - Traits: DIPLOID (flow cytometry 2012)
• Ubileen Gift (3x) = PI 392323 (585.001) - Pyrus communis L.
  - Pedigree: Clapp Favorite x Klementinka
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985, Uncertain: Bosc-1989
  - Traits: POLYPLOID (3x flow cytometry 2013), EARLY RIPE, LARGE FRUIT, SCAB RESISTANT, CURATOR CHOICE
• Ulitchka = PI 189695 (1158.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1995 PV-1995
  - Traits: DIPLOID (flow cytometry 2012)
• Unknown Bergamotte Type Cv. = PI 541390 (1235.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: N.Poiteau-1993 Pyronia-1993 Vein Yellows-1985
  - Traits: VERY LARGE FRUIT
• Unknown Cultivar [Bartlett type but round] = PI 541961 (1620.001) - Pyrus communis L.
  - Pedigree: Seedling selection or chance seedling
  - Virus Biological Assays - Negative: M.micromalus-2001 N.Poiteau-1987 Pyronia-1988
  - Traits: SCAB RESISTANT
• Unknown P. communis selection - Comice like = PI 541433 (1418.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: M.micromalus-1996 N.Poiteau-1985 Pyronia-1987 V.Crab-1992
• Untoasa de Geoagiu = PI 617652 (2593.001) - Pyrus communis L.
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2003 NP-1999 PV-1999
  - Traits: DIPLOID (flow cytometry)
• Urbaniste = PI 279333 (171.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: NP-1990 PV-1986 VC-1989
  - Traits: QUINCE COMPATIBLE, MONOLINIA RESISTANT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Ure = PI 541556 (2285.001) - Pyrus hybrid
  - Virus Biological Assays - Negative: NP-1990 PV-1990
  - Traits: COLD HARDY, SCAB RESISTANT, LOW CHILL, DIPLOID (flow cytometry 2012)
• Urechelnite = PI 502175 (1635.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1988 V.Crab-1991, Uncertain: M.micromalus-2001
  - Traits: SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Uzhi Li = PI 654958 (2784.001) - Pyrus ussuriensis Maxim. - VIRUS INFECTED
  - Pedigree: Recived from Kazakhstan, where they are used as pear rootstocks. Originated in China.
  - Virus Biological Assays - Positive: NP-2003
  - Traits: SCAB RESISTANT, ROOTSTOCK, DIPLOID (flow cytometry 2012)
• VIII 55 = PI 665791 (2653.003) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Negative: NP-2003
  - Traits: DIPLOID (flow cytometry 2012)
• Van Fleet Hybrid No. 1 = PI 64229 (588.001) - Pyrus hybrid
  - Pedigree: P. communis x chinese type
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1989 V.Crab-1988
  - Traits: SCAB RESISTANT, DIPLOID (flow cytometry 2012)
• Vanovskaya 84-2 - Turkmenistan = PI 665803 (2773.001) - Pyrus (betulifolia?) hybrid
  - Virus Biological Assays - Negative: NP-2004
  - Traits: DIPLOID (flow cytometry 2012)
• Variolosa (P. pashia hyb.) = PI 541717 (589.002) - Pyrus pashia Buch.-Ham. ex D. Don
  - Pedigree: P. pashia x P. communis
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-1998 NP-1989 PV-1989
  - Traits: FIRE BLIGHT RESISTANT, SCAB RESISTANT, NOT COLD HARDY, DIPLOID (flow cytometry)
• Vaughn = PI 617667 (2612.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: VY-1999, Negative: PV-2000
  - Traits: DIPLOID (flow cytometry 2012)
• Vavilov (Rous. Stuttgart x Dr. J. Guyot No. VII) = PI 337446 (499.001) - Pyrus communis L.
  - Pedigree: R. Shtutgartskii x Dr. J. Gujo
  - Virus Lab Assays - Negative: APMV-1987 PNRSV-1987
  - Virus Biological Assays - Negative: Bosc-1988 M.micromalus-1996 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1992
  - Traits: CURATOR CHOICE, DIPLOID (flow cytometry 2012)
• Vermilion = PI 641290 (2810.001) - Pyrus hybrid
  - Traits: LOW CHILL, DIPLOID (flow cytometry 2012)
• Vermont Beauty = PI 541277 (592.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1987 M.micromalus-1996 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1992
  - Traits: DIPLOID (flow cytometry), HEIRLOOM
• Verte Longue d'Automne = PI 541278 (593.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Vicar of Winkfield = PI 449288 (162.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: TOMRSV-1986, Uncertain: ASGV-1989
  - Virus Biological Assays - Negative: LA62-1983 N.Poiteau-1987 P.Crassane-1984, Uncertain: Bosc-1989
  - Traits: LATE RIPE, CULLINARY, STORAGE, FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Vicar of Winkfield (3x) = PI 541457 (1172.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: LA62-1983 M.micromalus-2001 N.Poiteau-2003 Pyronia-1985 V.Crab-1991
  - Traits: LATE RIPE, CULLINARY, STORAGE, FIRE BLIGHT SUSCEPTIBLE, QUINCE COMPATIBLE, POLYPLOID (3x flow cytometry 2007), HEIRLOOM
• Vidovaca = PI 264700 (595.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: N.Poiteau-1985
  - Traits: VERY EARLY RIPE, DIPLOID (flow cytometry 2012)
• Vietnam Asian Pear = PI 617647 (2586.002) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: selection of Pyrus pyrifolia
  - Virus Biological Assays - Negative: MM-1998 NP-1999 PV-1998
  - Traits: DIPLOID (flow cytometry 2012)
• Vila = PI 654930 (2678.003) - Pyrus communis L.
  - Traits: DIPLOID (flow cytometry 2012)
• Vineland 29018 = PI 145821 (596.001) - Pyrus hybrid - VIRUS INFECTED
  - Pedigree: Bartlett x Ya Li
  - Virus Lab Assays - Negative: APMV-1987 PNRSV-1987
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1987 Pyronia-1987 V.Crab-1985
  - Traits: DIPLOID (flow cytometry 2012)
• Vodenjac (3x) = PI 617614 (2540.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1999 PV-1999, Uncertain: MM-2001
  - Traits: SCAB RESISTANT, PSYLLA RESISTANT, POLYPLOID (3x flow cytometry 2008)
• W-1 fire blight resistant rootstock = PI 541279 (597.002) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK, DIPLOID (flow cytometry 2012)
• Waite (Canner) = PI 66131 (598.001) - Pyrus hybrid
  - Pedigree: Kieffer x unknown European type
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1987 M.micromalus-1999 N.Poiteau-2003 P.Crassane-1984 Pyronia-1988
  - Traits: FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry), MALE STERILE
• Walla Walla seedling (=Whitman?) = PI 617574 (2483.001) - Pyrus communis L. - VIRUS INFECTED
  - Pedigree: Chance seedling
  - Virus Biological Assays - Positive: NP-1992
  - Traits: HEIRLOOM, POLYPLOID (3x flow cytometry 2013)
• Warner = PI 541280 (599.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: P.Crassane-1984
  - Traits: FIRE BLIGHT RESISTANT, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Warren = PI 541448 (1582.001) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: M.micromalus-2001 N.Poiteau-1988 P.Crassane-1985 Pyronia-1988 V.Crab-1991
  - Traits: FIRE BLIGHT RESISTANT, LOW CHILL, QUINCE COMPATIBLE, DIPLOID (flow cytometry 2012,2014)
• Waseaka = PI 654931 (2682.002) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Biological Assays - Uncertain: PV-2003
  - Traits: DIPLOID (flow cytometry 2012)
• Waterville = PI 617530 (2298.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: MM-2001 NP-1992 PV-1991
  - Traits: COLD HARDY, DIPLOID (flow cytometry 2012)
• Wawrzyniec = PI 282982 (600.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: P.Crassane-1984 Vein Yellows-1985, Negative: V.Crab-1988
  - Traits: DIPLOID (flow cytometry 2012)
• White Doyenne = PI 541281 (602.004) - Pyrus communis L.
  - Pedigree: Origin uncertain. May be the 'Sementinum' pear of Greece.
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: LATE RIPE, ANCIENT, QUINCE COMPATIBLE, DIPLOID (flow cytometry), HEIRLOOM
• White Star = PI 541282 (603.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989 PV-1989
  - Traits: VERY LATE RIPE, DIPLOID (flow cytometry 2012)
• Whitehouse (P. calleryana) = PI 420995 (664.001) - Pyrus calleryana Decne.
  - Pedigree: OP seedling selection of cultivar 'Bradford'
  - Virus Biological Assays - Negative: M.micromalus-2001 N.Poiteau-1988 P.Crassane-1985 Pyronia-1987
  - Traits: FIRE BLIGHT SUSCEPTIBLE, ORNAMENTAL, LOW CHILL, DIPLOID (flow cytometry 2012)
• Whitman (=Walla Walla sdlg?) = PI 638015 (2825.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-2004 VY-2004
  - Traits: POLYPLOID (3x flow cytometry 2013)
• Wilder Early = PI 541283 (605.002) - Pyrus communis L.
  - Pedigree: Chance seedling
  - Virus Biological Assays - Negative: NP-1989 PV-1987
  - Traits: HEIRLOOM, SCAB RESISTANT, EARLY RIPE, CURATOR CHOICE, DIPLOID (flow cytometry 2012)
• Wilder Early [Wikler Early] = PI 541355 (1159.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1992 PV-1986
  - Traits: HEIRLOOM, SCAB RESISTANT, EARLY RIPE
• Wilenska Plenna = PI 483378 (1532.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: DIPLOID (flow cytometry 2012)
• Willard = PI 541356 (1160.001) - Pyrus communis L.
  - Pedigree: Bartlett x Dorset
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1987 P.Crassane-1985 Pyronia-1988
  - Traits: LATE RIPE, ROOTSTOCK, DIPLOID (flow cytometry 2012)
• Williams Precoce Morettini = PI 279341 (612.001) - Pyrus communis L.
  - Pedigree: Bartlett x Citron des Carmes
  - Virus Biological Assays - Negative: N.Poiteau-1988 P.Crassane-1984 Pyronia-1985, Uncertain: Bosc-1989
  - Traits: DIPLOID (flow cytometry 2012)
• Windorska = PI 282983 (614.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1987
  - Traits: POLYPLOID (3x flow cytometry 2013)
• Winioska-Saska = PI 506377 (1689.001) - Pyrus hybrid
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-1998 N.Poiteau-1991 Pyronia-1991
  - Traits: VERY LATE RIPE, DIPLOID (flow cytometry)
• Winkleman (= El Dorado?) = PI 541357 (1161.002) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1990 PV-1995
  - Traits: VERY LATE RIPE, DIPLOID (flow cytometry 2012)
• Winnals Longdon = PI 541486 (2029.001) - Pyrus communis L.
  - Pedigree: Probably a chance seedling
  - Virus Biological Assays - Negative: N.Poiteau-1992 Pyronia-1991 V.Crab-1989
  - Traits: PERRY, MEDIUM SHARP (MEDIUM ACID, MEDIUM TANNIN), HEIRLOOM, QUINCE COMPATIBLE, DIPLOID (flow cytometry 2012)
• Winter Cole = PI 129643 (1162.003) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Winter Nelis
  - Virus Biological Assays - Negative: NP-1990 PV-1995 VC-1988
  - Traits: LATE RIPE, FIRE BLIGHT SUSCEPTIBLE, HEIRLOOM, DIPLOID (flow cytometry 2012)
• Winter Nelis = PI 541285 (1164.001) - Pyrus communis L.
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: LA62-1983 M.micromalus-1998 N.Poiteau-2003 Pyronia-1988
  - Traits: FIRE BLIGHT SUSCEPTIBLE, LATE RIPE, DIPLOID (flow cytometry), HEIRLOOM
• Winter Nelis (4x chimera) = PI 541358 (1163.001) - Pyrus communis L.
  - Pedigree: Uncertain, possibly derived from cultivar Winter Nelis
  - Virus Biological Assays - Negative: Bosc-1989 N.Poiteau-1985 Pyronia-1988
  - Traits: FIRE BLIGHT SUSCEPTIBLE, LATE RIPE, POLYPLOID (4x chimaera flow cytometry 2007+2012)
• Worden Seckle = PI 541286 (619.001) - Pyrus communis L.
  - Pedigree: Seedling of cultivar Seckel
  - Virus Biological Assays - Negative: Bosc-1988 M.micromalus-1996 N.Poiteau-1988 P.Crassane-1984 Pyronia-1985 V.Crab-1992
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• X-Ceptional = PI 638019 (2829.001) - Pyrus communis L.
  - Virus Biological Assays - Uncertain: NP-2004
  - Traits: DIPLOID (flow cytometry 2012)
• Xiangshui Li [Hsiang Sui-Li] = PI 542022 (1617.002) - Pyrus ×bretschneideri Rehder
  - Pedigree: old selection from the wild in Northeast China
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: MM-2002 NP-1992 PV-1992
  - Traits: FIRE BLIGHT RESISTANT, MILDEW RESISTANT, SCAB RESISTANT, DIPLOID (flow cytometry)
• Ya Li = PI 506362 (1678.001) - Pyrus ×bretschneideri Rehder
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-2003 N.Poiteau-1987 Pyronia-1987
  - Traits: LATE RIPE, FIRE BLIGHT RESISTANT, LOW CHILL 500 hrs, PSYLLA RESISTANT, EARLY BLOOM, MILDEW RESISTANT, DIPLOID (flow cytometry), SCAB RESISTANT (Australia)
• Yaguang Li [Ya Kuang Li] = PI 45845 (620.001) - Pyrus ×bretschneideri Rehder
  - Pedigree: Reimer suspected P. ussuriensis x P. phaeocarpa
  - Virus Biological Assays - Negative: N.Poiteau-1992 P.Crassane-1984 Pyronia-1985
  - Traits: HEIRLOOM, DIPLOID (flow cytometry 2012)
• Yakumo = PI 224089 (622.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Pedigree: Akaho x Nijisseiki
  - Virus Biological Assays - Negative: Bosc-1988 Pyronia-1988
  - Traits: VERY LARGE FRUIT, DIPLOID (flow cytometry 2012)
• Yaquina (Payson) = PI 638016 (2826.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-2009 PV-2009
  - Traits: DIPLOID (flow cytometry 2012)
• Yellow Huffcap = PI 541287 (625.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1988 M.micromalus-1996 N.Poiteau-1985 Pyronia-1985 V.Crab-1992
  - Traits: PERRY, MEDIUM SHARP (HIGH ACID, MEDIUM TANNIN), HEIRLOOM, DIPLOID (flow cytometry 2012)
• Yokogoshi = PI 506367 (1579.001) - Pyrus pyrifolia (Burm. f.) Nakai - VIRUS INFECTED
  - Virus Biological Assays - Positive: Pyronia-1987, Negative: N.Poiteau-1987
  - Traits: VERY LATE RIPE, DIPLOID (flow cytometry 2012)
• Yungen = PI 617677 (2622.001) - Pyrus communis L. - VIRUS INFECTED
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Positive: NP-1999
  - Traits: DIPLOID (flow cytometry 2012)
• Zaharoasa de Vara = PI 352661 (626.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: M.micromalus-1999 N.Poiteau-1987 P.Crassane-1984 Pyronia-1985 V.Crab-1992
  - Traits: COMPACT HABIT, EARLY RIPE, DIPLOID (flow cytometry 2012)
• Zao Su = PI 617653 (2594.001) - Pyrus pyrifolia (Burm. f.) Nakai
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1998 PV-1999, Uncertain: MM-2003
  - Traits: SCAB RESISTANT, DIPLOID (flow cytometry)
• Zebra Pear O.P. - Georgia = PI 657920 (2846.001) - Pyrus communis L.
  - Pedigree: Fruit purchased at market in Gori, Georgia.
• Zebra Pear O.P. - Georgia = PI 657920 (2846.002) - Pyrus communis L.
  - Pedigree: Fruit purchased at market in Gori, Georgia.
• Zebra Pear O.P. - Georgia = PI 657920 (2846.003) - Pyrus communis L.
  - Pedigree: Fruit purchased at market in Gori, Georgia.
• Zebra Pear O.P. - Georgia = PI 657920 (2846.004) - Pyrus communis L.
  - Pedigree: Fruit purchased at market in Gori, Georgia.
• Zebra Pear O.P. - Georgia = PI 657920 (2846.005) - Pyrus communis L.
  - Pedigree: Fruit purchased at market in Gori, Georgia.
• Zebra Pear O.P. - Georgia = PI 657920 (2846.006) - Pyrus communis L.
  - Pedigree: Fruit purchased at market in Gori, Georgia.
• Zelinka = PI 483393 (1547.001) - Pyrus communis L.
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1997 N.Poiteau-1989 Pyronia-1985 V.Crab-1992
  - Traits: PSYLLA RESISTANT, DIPLOID (flow cytometry)
• Zimska Kajuska = PI 654935 (2698.004) - Pyrus communis L.
  - Traits: DIPLOID (flow cytometry 2012)
• Zutica = PI 665773 (2859.001) - Pyrus communis L.
  - Pedigree: Collected from the wild in Yugoslavia.
  - Traits: DIPLOID (flow cytometry 2012)