NCGR-Corvallis Pyrus Catalog

Fire Blight Resistant Genotypes

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.

• 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)
• 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)
• 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
• 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)
• 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)
• 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 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
• 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
• 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
• 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
• 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)
• 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)
• 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)
• 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
• 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)
• 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
• 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)
• 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)
• 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)
• 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)
• 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)
• 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
• 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)
• 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
• 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
• 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)
• 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
• 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
• 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
• 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
• 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
• 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)
• 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
• 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
• 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
• 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)
• 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
• 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
• 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)
• 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
• 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
• 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)
• 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
• 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
• 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
• Longworth = PI 541219 (357.003) - Pyrus communis L.
  - Virus Biological Assays - Negative: NP-1989
  - Traits: FIRE BLIGHT RESISTANT, HEIRLOOM
• 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
• 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
• 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
• 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
• 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
• 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
• 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)
• 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
• 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
• 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
• 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)
• 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
• 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
• 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 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 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 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 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 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 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 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 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 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 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
• 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
• 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
• 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
• 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)
• 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-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
• P. betulifolia = PI 540976 (1309.001) - VIRUS INFECTED
  - Pedigree: Seedling selection from seed collected from North China
  - Virus Biological Assays - Positive: N.Poiteau-1993 Pyronia-1993 Vein Yellows-1985, Uncertain: B13-1983
  - Traits: FIRE BLIGHT RESISTANT
• P. betulifolia = PI 540978 (1311.001) - VIRUS INFECTED
  - Pedigree: Seedling selection from seed collected from North China
  - Virus Biological Assays - Positive: N.Poiteau-1985
  - Traits: FIRE BLIGHT RESISTANT
• P. betulifolia OSU-3 = PI 540973 (1263.001)
  - Pedigree: Seedling selection from seed collected in China
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT
• P. betulifolia x P. calleryana-5 = PI 541783 (1353.001)
  - Pedigree: P. betulaefolia-2 x P. calleryana-5 seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1985
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• P. betulifolia-1 x P-12 = PI 541790 (1376.001)
  - Pedigree: P. betulaefolia-1 x P-12 seedling selection
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1990 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• P. betulifolia-1 x P-79 = PI 541791 (1377.001)
  - Pedigree: P. betulaefolia-1 x P-79 seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1987 V.Crab-1992
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• P. betulifolia-2 x Farmingdale = PI 541785 (1357.001)
  - Pedigree: P. betulifolia-2 x Farmingdale
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1990 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• P. betulifolia-2 x P-12 = PI 541784 (1355.001)
  - Pedigree: P. betuifolia-2 x P-12 seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• P. betulifolia-2 x P. betulifolia-1 = PI 540994 (1485.001)
  - Pedigree: P. betulifolia-2 x P. betulifolia-1 seedling selection B
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, ROOTSTOCK
• P. calleryana = PI 541021 (663.001)
  - Pedigree: Probably a seedling selection from an Asian seedlot
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT, MILDEW RESISTANT, DIPLOID (flow cytometry)
• P. calleryana = PI 541009 (666.001)
  - Pedigree: Probably a seedling selection from an Asian seedlot
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1988
  - Traits: FIRE BLIGHT RESISTANT
• P. calleryana OSU-2 = PI 541053 (1264.003)
  - Pedigree: Seedling selection from seed collected in China
  - Virus Biological Assays - Negative: NP-1990 PV-1989
  - Traits: FIRE BLIGHT RESISTANT
• P. calleryana OSU-3 = PI 541054 (1265.003)
  - Pedigree: Seedling selection from seed collected in China
  - Virus Biological Assays - Negative: NP-1992 PV-1989
  - Traits: FIRE BLIGHT RESISTANT
• P. calleryana OSU-5 = PI 541055 (1266.002)
  - Pedigree: Seedling selection from seedlot collected wild in China
  - Virus Biological Assays - Negative: NP-1987 PV-1987
  - Traits: FIRE BLIGHT RESISTANT
• P. calleryana OSU-6 = PI 541056 (1267.001)
  - Pedigree: Seedling selection from seed collected in China
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT
• P. calleryana OSU-7 = PI 541057 (1268.002)
  - Pedigree: Seedling selection from seed collected in China
  - Virus Biological Assays - Negative: NP-1989
  - Traits: FIRE BLIGHT RESISTANT
• P. calleryana OSU-8 = PI 541058 (1269.002)
  - Pedigree: Seedling selection from seed collected in China
  - Virus Biological Assays - Negative: NP-1987 PV-1989
  - Traits: FIRE BLIGHT RESISTANT
• P. calleryana OSU-9 = PI 541059 (1270.001)
  - Pedigree: Seedling selection from seed collected in China
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1988 V.Crab-1992, Uncertain: B13-1983
  - Traits: FIRE BLIGHT RESISTANT
• P. communis ssp. caucasica Mag 1 - Pyatigorsk, Russia = PI 541290 (691.001) - VIRUS INFECTED
  - Pedigree: Seedling selection from seedlot collected in Russia
  - Virus Biological Assays - Positive: B13-1983 N.Poiteau-1983 Vein Yellows-1985
  - Traits: FIRE BLIGHT RESISTANT
• P. communis ssp. caucasica Mag 5 - Pyatigorsk, Russia = PI 541560 (692.001)
  - Pedigree: Seedling selection from seed collected in Russia
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987, Uncertain: M.micromalus-2001
  - Traits: FIRE BLIGHT RESISTANT
• P. communis ssp. pyraster Olez 5 - Turkey = PI 541291 (693.001)
  - Pedigree: Seedling selection from seed collected in Turkey
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1985
  - Traits: FIRE BLIGHT RESISTANT
• P. elaeagrifolia Olez 2 - Turkey = PI 541614 (769.001)
  - Pedigree: Seedling selection from seed collected wild in Turkey
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1987
  - Traits: FIRE BLIGHT RESISTANT
• P. elaeagrifolia WB-4 - Turkey = PI 541615 (770.001)
  - Pedigree: Seedling selection from seed collected in Turkey
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1988, Uncertain: B13-1983
  - Traits: FIRE BLIGHT RESISTANT, ORNAMENTAL
• P. koehnei (pure) = PI 541832 (818.001)
  - Pedigree: Seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1989, Uncertain: M.micromalus-2003
  - Traits: FIRE BLIGHT RESISTANT, LOW CHILL, NOT COLD HARDY, DIPLOID (flow cytometry)
• P. nivalis P-91 (pure) = PI 541859 (725.002)
  - Pedigree: Seedling selection
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: NP-1987 PV-1990, Uncertain: MM-2003
  - Traits: FIRE BLIGHT RESISTANT, DIPLOID (flow cytometry)
• P. spinosa (amygdaliformis) - Greece = PI 540922 (639.001)
  - Pedigree: Seedling selection from seed collected in Greece
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985 Pyronia-1985
  - Traits: FIRE BLIGHT RESISTANT
• 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)
• 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
• 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)
• 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)
• 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)
• 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)
• 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)
• 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
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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 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)
• 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)
• 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)
• 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
• 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)
• 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)