Details for: PI 541295, Pyrus communis L. subsp. pyraster (L.) Ehrh., P-18


Summary Data
Taxonomy:
Pyrus communis L. subsp. pyraster (L.) Ehrh.
Top Name:
P-18
Origin:
Developed – Oregon, United States
Received by NPGS:
21 Feb 1981
Improvement Status:
Breeding material
Form Received:
Plant
Life Form:
Tree
Life Habit:
Tree
Availability
This accession is not available. Contact site for status.
Restricted Distribution due to Pathogen infection

  
There are no images for this accession.

Core Passport Data
Taxonomy:
Pyrus communis L. subsp. pyraster (L.) Ehrh.
Top Name:
P-18
Origin:
Developed – Oregon, United States
Received by NPGS:
21 Feb 1981
Improvement Status:
Breeding material
Form Received:
Plant
Life Form:
Tree
Life Habit:
Tree
Source History
Developed
1939.
Oregon, United States
Comment: Selection released in 1939
Developer(s):
Donated
21 February 1981.
Oregon, United States
Comment: Received from collection at Medford, OR to NCGR-Corvallis
Donor(s):
Accession Names and Identifiers
P-18
Type: Unverified name

Rootstock Pear
Type: Local name

Oregon 18 (P-18)
Type: Developer identifier
Reimer, Frederic (Frank) C. Oregon State University

SPECIES GROUP 1
Type: Site identifier
Group: CROPTYPE

CPYR 716
Type: Other or unclassified name
Group: LOCAL
Corvallis local number

Narrative
Oregon 18 (PI 541295).-Originated in Medford, Oregon, by F.C. Reimer, Oregon Agriculture Experiment Station. Introduced in 1939. Open-pollinated seedling of a French seedling (Pyrus communis); selected in 1926; tested as Oregon P-18. Fruit: small; flesh hard, astringent; of no commercial value. Rootstock: fire blight resistant; used as parent for rootstock breeding studies. - Brooks and Olmo Register of Fruit and Nut Varieties.

The Southern Oregon Experiment Station made a concerted attempt to find fire blight resistant root and framework stocks from 1923 and 1931. Over 10,000 French P. communis seedlings were grown and repeatedly inoculated with the blight organism, and after 5-6 years only ten trees survived. These seedlings were capable of transmitting blight resistance to a high percentage of their progeny, particularly when cross pollinated with other blight resistant pears. The best of the resistant seedlings were W-1, W-2, P-18, P-30, P-61, P-70 and P-87 (F. Reimer 1950. Oregon Agricultural Experiment Station Bulletin 485). - H. Hartman, 1957

Pyrus communis L. subspp. pyraster (L.) Ehrh.
Genus:
Pyrus
Section:
Pyrus
Family:
Rosaceae
Subfamily:
Amygdaloideae
Tribe:
Maleae
Subtribe:
Malinae
Nomen number:

448613
Place of publication:

Hannover. Mag. 18:223. 1780 (Beitr. Naturk. 1:100. 1787)
Verified:
03/03/2006 by ARS Systematic Botanists.
Other conspecific taxa
Pyrus communis L. (1038 active accession[s])
Pyrus communis L. subsp. caucasica (Fed.) Browicz (77 active accession[s])
Pyrus communis L. subsp. communis (39 active accession[s])
Autonyms (not in current use), synonyms and invalid designations
Basionym
Pyrus communis L. var. pyraster L.

Homotypic Synonym(s)
Pyrus pyraster (L.) Burgsd.

Common names
LanguageNameAlternate namenoteseqCitation
Englishwild pear as Pyrus pyraster1Erhardt, W. et al. 2002. Zander: Handwörterbuch der Pflanzennamen, 17. Auflage Note: = Pyrus pyraster
Frenchpoirier sauvage as Pyrus pyraster2Erhardt, W. et al. 2002. Zander: Handwörterbuch der Pflanzennamen, 17. Auflage Note: = Pyrus pyraster
GermanWild-Birne as Pyrus pyraster2Erhardt, W. et al. 2002. Zander: Handwörterbuch der Pflanzennamen, 17. Auflage Note: = Pyrus pyraster
GermanWilder-Birnbaum as Pyrus pyraster2Erhardt, W. et al. 2002. Zander: Handwörterbuch der Pflanzennamen, 17. Auflage Note: = Pyrus pyraster
Annotations
  • The Taxonomic Name Of The Accession When It Was Received: 31 Jul 1989, from Pyrus communis L. var. pyraster L. to Pyrus communis L.
  • Taxonomic Re-Identification: 08 Aug 2012, from Pyrus communis L. to Pyrus communis L. subsp. pyraster (L.) Ehrh.
Other Links
Actions
Pathogens
Bioassay
  • P. communis selection B-13. POSITIVE Inventory: CPYR 716 .001 PL
  • P. communis 'Passe Crassane'. POSITIVE Inventory: CPYR 716 .001 PL
Vouchers
Citations
Pedigree
Description:
Open-pollinated French P. communis seedling selection

Observations

Phenotype Data

CategoryDescriptorDescriptionValueSample SizeStudyInventoryAvailability
CYTOLOGICPLOIDY LEVELNumber of sets of chromosomes.2x - diploid PYRUS.PLOIDY.2013CPYR 716 .001 PLNot Available
DISEASEFRUIT_SCABRATING OF DAMAGE CAUSED BY FRUIT SCAB1 - NO DAMAGE PYRUS.CORVALLIS.1987 Not Available
DISEASEFRUIT_SCABRATING OF DAMAGE CAUSED BY FRUIT SCAB3 - (1 = NO DAMAGE, 9 = SEVERE DAMAGE) PYRUS.CORVALLIS.2005.FRUITSCABCPYR 716 .001 PLNot Available
DISEASELEAF_SCABRATING OF DAMAGE CAUSED BY LEAF SCAB3 - (1 = NO DAMAGE, 9 = SEVERE DAMAGE) PYRUS.CORVALLIS.1987 Not Available
DISEASEPSEUDOMONASRATING OF DAMAGE CAUSED BY PSEUDOMONAS1 - NO DAMAGE PYRUS.CORVALLIS.1988 Not Available
DISEASERUSTRATING OF DAMAGE CAUSED BY RUST1 - NO DAMAGE PYRUS.CORVALLIS.1987 Not Available
GROWTHTREE SYMMETRYSYMMETRY OF TREE GROWTH2 - INTERMEDIATE PYRUS.WIEGREFE.1992 Not Available
INSECTBLISTER_MITESRATING OF DAMAGE CAUSED BY BLISTER MITES1 - NO DAMAGE PYRUS.CORVALLIS.1987 Not Available
INSECTBLISTER_MITESRATING OF DAMAGE CAUSED BY BLISTER MITES5 - (1 = NO DAMAGE, 9 = SEVERE DAMAGE) PYRUS.CORVALLIS.1987 Not Available
MORPHOLOGYTREE SHAPEOVERALL SHAPE OF TREE SILHOUETTE3 - OVAL ROUND PYRUS.WIEGREFE.1992 Not Available
MORPHOLOGYCENTRAL LEADERDOMINANCE OR PERSISTENCE OF THE CENTRAL LEADER2 - MODERATE PYRUS.WIEGREFE.1992 Not Available
MORPHOLOGYBRANCH ANGLE 1LOWER LIMIT OF TYPICAL BRANCH ANGLE IN DEGREES0 PYRUS.WIEGREFE.1992 Not Available
MORPHOLOGYBRANCH ANGLE 2UPPER LIMIT OF TYPICAL BRANCH ANGLE IN DEGREES0 PYRUS.WIEGREFE.1992 Not Available
MORPHOLOGYBRANCH DENSITYDENSITY OF BRANCHING1 - OPEN PYRUS.WIEGREFE.1992 Not Available
MORPHOLOGYBRANCH STIFFNESSPHYSICAL (N.N. VISUAL) STIFFNESS OF BRANCHES2 - INTERMEDIATE PYRUS.WIEGREFE.1992 Not Available
MORPHOLOGYBARK TEXTURETEXTURE OF THE BARK2 - SMOOTH PYRUS.WIEGREFE.1992 Not Available
MORPHOLOGYTHORN ADULTPRESENCE OF THORNS AS ADULT1 - NONE PYRUS.WIEGREFE.1992 Not Available
PHENOLOGYFIRST_BLOOMJULIAN DATE OF FIRST BLOOM91 PYRUS.CORVALLIS.1990 Not Available
PHENOLOGYFIRST_BLOOMJULIAN DATE OF FIRST BLOOM94 PYRUS.CORVALLIS.1988 Not Available
PHENOLOGYFIRST_BLOOMJULIAN DATE OF FIRST BLOOM97 PYRUS.CORVALLIS.1989 Not Available
PHENOLOGYFULL_BLOOMJULIAN DATE OF FULL BLOOM100 PYRUS.CORVALLIS.1988 Not Available
PHENOLOGYFULL_BLOOMJULIAN DATE OF FULL BLOOM101 PYRUS.CORVALLIS.1989 Not Available
PHENOLOGYFULL_BLOOMJULIAN DATE OF FULL BLOOM94 PYRUS.CORVALLIS.1990 Not Available
PHENOLOGYLAST_BLOOMJULIAN DATE OF LAST BLOOM100 PYRUS.CORVALLIS.1990 Not Available
PHENOLOGYLAST_BLOOMJULIAN DATE OF LAST BLOOM106 PYRUS.CORVALLIS.1988 Not Available
PHENOLOGYLAST_BLOOMJULIAN DATE OF LAST BLOOM109 PYRUS.CORVALLIS.1989 Not Available
PHENOLOGYFULL_RIPEJULIAN DATE OF FULL RIPE FRUIT262 PYRUS.CORVALLIS.1990 Not Available