Skip to main content
Skip to site map
United States Department of Agriculture
Agricultural Research Service
0
Cart
Welcome!
***THIS IS A TESTING SITE ONLY.***
Please do not place germplasm orders on this site.
GRIN-Global
Menu
USDA National Plant Germplasm System
Version:
2.3.12 [npgstest -- bhunt2312-0204]
Menu
Accessions
Descriptors
Reports
GRIN Taxonomy
Search Taxonomy
Crop Wild Relative Data
Nodulation Data
Regulations
World Economic Plants
About GRIN Taxonomy
GRIN
USDA Genetic Resource Collections
About GRIN-Global
Use of Cookies
NPGS Distribution Policy
Software Disclaimer
GRIN-U
Help
Contact Us
Your Profile
Your Profile
Your Web Request History
Your Address Book
Your Wish List
Details for: PI 541859,
Pyrus
×
nivalis
Jacq., P-91
Summary
Passport
Taxonomy
Other
Pedigree
IPR
Observation
Summary Data
Taxonomy:
Pyrus
×
nivalis
Jacq.
Top Name:
P-91
Origin:
Developed – Oregon, United States
Maintained:
National Clonal Germplasm Repository
Received by NPGS:
21 Feb 1981
Improvement Status:
Breeding material
Form Received:
Plant
Life Form:
Tree
Life Habit:
Tree
Backup Location:
National Laboratory for Genetic Resources Preservation
Availability
This accession is not available. Contact site for status.
National Clonal Germplasm Repository
Request are accepted Sept. 1st - Nov. 30th; Ships Jan.- Mar.
Images
(3
total. Click on image for more.)
Core Passport Data
Taxonomy:
Pyrus
×
nivalis
Jacq.
Top Name:
P-91
Origin:
Developed – Oregon, United States
Maintained:
National Clonal Germplasm Repository
Received by NPGS:
21 Feb 1981
Improvement Status:
Breeding material
Form Received:
Plant
Life Form:
Tree
Life Habit:
Tree
Source History
Developed
1925.
Oregon, United States
Comment:
Selection introduced in 1925
Developer(s):
Reimer, Frederic (Frank) C., Oregon State University
Donated
21 February 1981.
Oregon, United States
Comment:
Received from collection at Medford, OR to NCGR-Corvallis
Donor(s):
Lombard, Porter, Oregon State University
Accession Names and Identifiers
P-91
Type: Unverified name
Rootstock Pear
Type: Local name
P-91 blight resistant rootstock
Type: Developer identifier
Reimer, Frederic (Frank) C. Oregon State University
SPECIES GROUP 1
Type: Site identifier
Group: CROPTYPE
CPYR 725
Type: Other or unclassified name
Group: LOCAL
Corvallis local number
Narrative
Fire blight resistant rootstock. 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
×
nivalis
Jacq.
Genus:
Pyrus
Section:
Pyrus
Family:
Rosaceae
Subfamily:
Amygdaloideae
Tribe:
Maleae
Subtribe:
Malinae
Nomen number:
30545
Place of publication:
Fl. austriac. 2:4, t. 107. 1774, pro sp.
Comment:
valid publication verified from original literature
Verified:
07/12/2011
by ARS Systematic Botanists.
Other conspecific taxa
Autonyms (not in current use), synonyms and invalid designations
Autonym(s)
Pyrus
×
nivalis
Jacq. subsp.
nivalis
Pyrus
×
nivalis
Jacq. var.
nivalis
Heterotypic Synonym(s)
Pyrus
×
nivalis
Jacq. subsp.
salviifolia
(DC.) Schinz & Thell.
Pyrus
×
nivalis
Jacq. var.
orientalis
Terpó
Pyrus
×
nivalis
Jacq. var.
salviifolia
(DC.) Rouy & A. Camus
Pyrus bulgarica
Kuth. & Sachokia
Pyrus elaeagrifolia
Pall. subsp.
bulgarica
(Kuth. & Sachokia) Valev
Pyrus salviifolia
DC.
Common names
Language
Name
Alternate name
note
seq
Citation
English
snow pear
1
Erhardt, W. et al.
2000. Zander: Handwörterbuch der Pflanzennamen, 16. Auflage
German
Schnee-Birnbaum
2
Erhardt, W. et al.
2000. Zander: Handwörterbuch der Pflanzennamen, 16. Auflage
Name
References
Annotations
Other Links
Actions
Pathogens
Bioassay
P. communis selection B-13. POSITIVE
Inventory:
CPYR 725 .001 PL
P. communis 'Passe Crassane'. AMBIGUOUS
Inventory:
CPYR 725 .001 PL
Virginia Crab. NEGATIVE
Inventory:
CPYR 725 .001 PL
P. communis 'Nouveau Poiteau'. NEGATIVE
Inventory:
CPYR 725 .002 PL
Pyronia veitchii. NEGATIVE
Inventory:
CPYR 725 .002 PL
Vouchers
Citations
Pedigree
Description:
Seedling selection
Material Transfer Agreement
Observations
Phenotype Data
Category
Descriptor
Description
Value
Sample Size
Study
Inventory
Availability
CYTOLOGIC
PLOIDY LEVEL
Number of sets of chromosomes.
2x - diploid
PYRUS.PLOIDY.2008
CPYR 725 .002 PL
Not Available
DISEASE
FRUIT_SCAB
RATING OF DAMAGE CAUSED BY FRUIT SCAB
1 - NO DAMAGE
PYRUS.CORVALLIS.2003.FRUITSCAB
CPYR 725 .002 PL
Not Available
DISEASE
FRUIT_SCAB
RATING OF DAMAGE CAUSED BY FRUIT SCAB
2 - (1 = NO DAMAGE, 9 = SEVERE DAMAGE)
PYRUS.CORVALLIS.2001.FRUITSCAB
CPYR 725 .002 PL
Not Available
DISEASE
FRUIT_SCAB
RATING OF DAMAGE CAUSED BY FRUIT SCAB
5 - (1 = NO DAMAGE, 9 = SEVERE DAMAGE)
PYRUS.CORVALLIS.2002.FRUITSCAB
CPYR 725 .002 PL
Not Available
DISEASE
MILDEW
RATING OF DAMAGE CAUSED BY MILDEW
1 - NO DAMAGE
2
PYRUS.CORVALLIS.2003.MILDEW
CPYR 725 .002 PL
Not Available
DISEASE
MILDEW
RATING OF DAMAGE CAUSED BY MILDEW
3 - (1 = NO DAMAGE, 9 = SEVERE DAMAGE)
3
PYRUS.CORVALLIS.2002.MILDEW
CPYR 725 .002 PL
Not Available
GENSTOCK
PYRUS CORE SUBSET
A flag to indicate the accession is part of the core subset
PYRUS.CORE.2012
Not Available
MORPHOLOGY
BLOOM_DENSITY
BLOOM DENSITY
1 - LOW
PYRUS.CORVALLIS.1987
Not Available
PHENOLOGY
FULL_BLOOM
JULIAN DATE OF FULL BLOOM
105
PYRUS.CORVALLIS.1987
Not Available
PHENOLOGY
LAST_BLOOM
JULIAN DATE OF LAST BLOOM
120
PYRUS.CORVALLIS.1987
Not Available