NCGR-Corvallis Pyrus Catalog

Low Chill 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.

• 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)
• 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)
• 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)
• 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)
• 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)
• 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
• 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)
• 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)
• 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
• Bosarge = PI 641289 (2809.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Biological Assays - Positive: MM-2003
  - Traits: LOW CHILL, 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)
• 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)
• 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)
• 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
• 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)
• 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
• 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)
• 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
• 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
• 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)
• 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
• 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
• 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
• 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)
• 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
• Henderson = PI 617664 (2609.001) - Pyrus pyrifolia (Burm. f.) Nakai - VIRUS INFECTED
  - Virus Biological Assays - Positive: PV-2001, Uncertain: ASGV-1999
  - Traits: LOW CHILL
• Higdon = PI 617657 (2602.001) - Pyrus hybrid - VIRUS INFECTED
  - Virus Biological Assays - Positive: PV-2002
  - Traits: LOW CHILL, FIRE BLIGHT RESISTANT
• 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)
• 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
• 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
• 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)
• 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
• Ledbetter Pear = PI 641280 (2597.001) - Pyrus sp. - VIRUS INFECTED
  - Virus Biological Assays - Positive: NP-1998 PV-1998
  - Traits: LATE RIPE, LOW CHILL
• 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
• 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
• 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
• 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
• 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
• 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
• 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)
• 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)
• Nepal 5049 = PI 654937 (2718.001) - Pyrus pashia hybrid
  - Virus Biological Assays - Negative: NP-2002 PV-2002
  - Traits: LOW CHILL, NOT COLD HARDY
• 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-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-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-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
• 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. betulifolia = PI 617510 (921.001)
  - Pedigree: Seedling selection from seedlot collected in Asia
  - Virus Biological Assays - Negative: N.Poiteau-1990 P.Crassane-1985 Pyronia-1987
  - Traits: LOW CHILL
• P. calleryana = PI 541010 (669.001)
  - Virus Biological Assays - Negative: N.Poiteau-1987 P.Crassane-1985 Pyronia-1987 V.Crab-1992
  - Traits: LOW CHILL
• P. calleryana = PI 541061 (1272.001)
  - Pedigree: Seedling selection from Asian seedlot
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: LOW CHILL
• P. calleryana - Crown Point 5-67 = PI 541082 (1587.003)
  - Pedigree: Rootstock propagated from productive orchard tree from Crown Point orchard, Medford area
  - Virus Biological Assays - Negative: NP-1996 PV-1996
  - Traits: ROOTSTOCK, LOW CHILL
• P. calleryana D6 = PI 214185 (665.001)
  - Pedigree: Origially collected from the wild in S. China
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985
  - Traits: ROOTSTOCK, LOW CHILL
• P. calleryana No. 11 = PI 541017 (671.001)
  - Pedigree: Seedling selection from seed rec'd from Southern Nursery
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1983 Pyronia-1985
  - Traits: LOW CHILL
• P. calleryana PC-6 = PI 617505 (674.001)
  - Virus Biological Assays - Negative: N.Poiteau-1983 P.Crassane-1984 Pyronia-1984
  - Traits: LOW CHILL
• P. calleryana x P. fauriei = PI 541729 (650.001)
  - Pedigree: P. calleryana x P. fauriei
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1985
  - Traits: LOW CHILL
• P. calleryana x P. fauriei = PI 541730 (679.001)
  - Pedigree: P. calleryana x P. fauriei
  - Virus Biological Assays - Negative: N.Poiteau-1992 Pyronia-1987
  - Traits: LOW CHILL, Potential Anjou Pollenizer
• P. dimorphophylla - Inunashi - Japan = PI 318871 (295.001)
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: Bosc-1989 M.micromalus-1996 N.Poiteau-2003 P.Crassane-1984 Pyronia-1984 V.Crab-1989
  - Traits: MILDEW RESISTANT, LOW CHILL, DIPLOID (flow cytometry)
• P. dimorphophylla 407 = PI 541609 (1457.001) - VIRUS INFECTED
  - Pedigree: Seedling selection B from seed collected in Japan
  - Virus Lab Assays - Negative: PNRSV-1990
  - Virus Biological Assays - Positive: N.Poiteau-1985 Vein Yellows-1985
  - Traits: ORNAMENTAL POTENTIAL, LOW CHILL
• P. dimorphophylla 407 seedling B = PI 541607 (1399.001)
  - Pedigree: Seedling selection B from seed collected in Japan
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1985
  - Traits: LOW CHILL
• P. dimorphophylla Vo-26 = PI 325927 (1456.001) - VIRUS INFECTED
  - Pedigree: Seedling selection from wild Japanese seedlot CPYR 939
  - Virus Biological Assays - Positive: N.Poiteau-1985 Vein Yellows-1985
  - Traits: LOW CHILL
• P. dimorphophylla x P. fauriei = PI 541734 (762.001)
  - Pedigree: P. dimorphylla x P. fauriei
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: LOW CHILL
• P. dimorphophylla x P. fauriei W-6 = PI 541735 (763.001)
  - Pedigree: P. dimorphylla x P. fauriei
  - Virus Biological Assays - Negative: B13-1983 M.micromalus-2003 N.Poiteau-1985 Pyronia-1987
  - Traits: LOW CHILL
• P. fauriei = PI 541641 (1211.001)
  - Pedigree: Seedling selection from seedlot collected in Korea
  - Virus Biological Assays - Negative: M.micromalus-2003 N.Poiteau-1985 Pyronia-1990 V.Crab-1992
  - Traits: LOW CHILL
• P. fauriei = PI 541641 (1213.001)
  - Pedigree: Seedling selection from seedlot collected in Korea
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1988
  - Traits: LOW CHILL
• P. fauriei = PI 541644 (1280.003)
  - Pedigree: Seedling selection from seed collected wild in Korea
  - Virus Biological Assays - Negative: NP-1992 PV-1995
  - Traits: LOW CHILL
• P. fauriei (dwarfing rootstock) = PI 541644 (1280.001) - VIRUS INFECTED
  - Pedigree: Seedling selection from seed collected wild in Korea
  - Virus Biological Assays - Positive: B13-1983 Pyronia-1993
  - Traits: LOW CHILL
• P. fauriei No. 4 = PI 541633 (779.001)
  - Pedigree: Seedling selection from seedlot collected in Korea
  - Virus Biological Assays - Negative: Pyronia-1987 V.Crab-1992
  - Traits: LOW CHILL
• P. koehnei = PI 541834 (825.001)
  - Pedigree: Seedling selection from seedlot collected in Taiwan
  - Virus Biological Assays - Negative: Pyronia-1990
  - Traits: LOW CHILL, NOT COLD HARDY
• 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. pyrifolia - Thailand = PI 420808 (885.001)
  - Pedigree: Collected from the wild in Thailand.
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1985
  - Traits: SCAB RESISTANT, LOW CHILL
• P. ussuriensis - China (from Vavilov) = PI 305300 (1197.001)
  - Pedigree: Seedling selection from seedlot collected in China
  - Virus Biological Assays - Negative: N.Poiteau-1987 Pyronia-1987
  - Traits: LOW CHILL
• P. ussuriensis - Manchuria = PI 143978 (379.001)
  - Pedigree: Possibly a seedling selection from a Chinese seedlot
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: LA62-1983 M.micromalus-2000 N.Poiteau-1985 Pyronia-1987
  - Traits: EARLY BLOOM, MILDEW RESISTANT, LOW CHILL, DIPLOID (flow cytometry)
• P. ussuriensis - Manchuria = PI 143978 (1139.001)
  - Pedigree: Possibly a seedling selection from a Chinese seedlot
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-2002 N.Poiteau-1987 Pyronia-1988
  - Traits: EARLY BLOOM, MILDEW RESISTANT, LOW CHILL, DIPLOID (flow cytometry)
• P. ussuriensis - Manchuria = PI 143978 (1300.001)
  - Pedigree: Possibly a seedling selection from a Chinese seedlot
  - Virus Biological Assays - Negative: N.Poiteau-1985 Pyronia-1987
  - Traits: EARLY BLOOM, LOW CHILL
• P. ussuriensis MA 1919-23 = PI 542015 (1260.001)
  - Pedigree: Seedling selection from seedlot collected wild in China
  - Virus Lab Assays - Negative: PBCVd-2000
  - Virus Biological Assays - Negative: M.micromalus-2003 N.Poiteau-1985 Pyronia-1987
  - Traits: EARLY BLOOM, LOW CHILL, DIPLOID (flow cytometry)
• P. ussuriensis No. 6 - Korea = PI 542003 (926.001)
  - Pedigree: Seedling selection from seed collected in Korea
  - Virus Biological Assays - Negative: B13-1983 N.Poiteau-1985
  - Traits: LOW CHILL
• P. ussuriensis W-6 = PI 542018 (1299.001)
  - Pedigree: Probably a seedling selection
  - Virus Biological Assays - Negative: N.Poiteau-1990 Pyronia-1987
  - Traits: EARLY BLOOM, LOW CHILL
• 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
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• 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)
• Vermilion = PI 641290 (2810.001) - Pyrus hybrid
  - Traits: LOW CHILL, 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)
• 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)
• 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)