Details for: PI 637992, Pyrus communis L., 'A20'


Summary Data
Taxonomy:
Pyrus communis L.
Cultivar:
'A20'
Origin:
Developed – United Kingdom
Received by NPGS:
30 Jan 2001
Improvement Status:
Cultivar
Form Received:
Scion
Life Form:
Tree
Life Habit:
Tree
Availability
This accession is not available. Contact site for status.
Request are accepted Sept. 1st - Nov. 30th; Ships Jan.- Mar.

  
There are no images for this accession.

Core Passport Data
Taxonomy:
Pyrus communis L.
Cultivar:
'A20'
Origin:
Developed – United Kingdom
Received by NPGS:
30 Jan 2001
Improvement Status:
Cultivar
Form Received:
Scion
Life Form:
Tree
Life Habit:
Tree
Source History
Developed
NEAR 1965.
United Kingdom

Donated
30 January 2001.
Maryland, United States

Donor(s):
Accession Names and Identifiers
'A20'
Type: Cultivar name

'A-20'
Type: Cultivar name

CPYR 2717
Type: Site identifier
Group: LOCAL
Corvallis local number

EUROPEAN CULTIVAR
Type: Site identifier
Group: CROPTYPE

Narrative
Indicator clone for pear bark disorders. Originated in the 1960's at Long Ashton, England. It is a Perry Pear seedling selelcted for producing good symptoms to Pear Vein Yellows and Ring Pattern Mosaic Virus. In 1969, in France, it was found to be a good indicator for Pear blister canker viroid.
Pyrus communis L.
Genus:
Pyrus
Section:
Pyrus
Family:
Rosaceae
Subfamily:
Amygdaloideae
Tribe:
Maleae
Subtribe:
Malinae
Nomen number:

30474
Place of publication:

Sp. pl. 1:479, 2:1200. 1753
Comment:
probably of hybrid origin
Verified:
07/07/2011 by ARS Systematic Botanists.
Other conspecific taxa
Pyrus communis L. subsp. caucasica (Fed.) Browicz (77 active accession[s])
Pyrus communis L. subsp. communis (39 active accession[s])
Pyrus communis L. subsp. pyraster (L.) Ehrh. (113 active accession[s])
Autonyms (not in current use), synonyms and invalid designations
Heterotypic Synonym(s)
Pyrus asiae-mediae (Popov) Maleev
Pyrus balansae Decne.
Pyrus bourgaeana Decne.
Pyrus communis L. subsp. bourgaeana (Decne.) Nyman
Pyrus communis L. var. mariana Willk.
Pyrus domestica Medik.
Pyrus elata Rubtzov
Pyrus medvedevii Rubtzov

Common names
LanguageNameAlternate namenoteseqCitation
Englishpear  1Wiersema, J. H. & B. León. 1999. World economic plants: a standard reference CRC Press, Boca Raton, FL.
Frenchpoirier  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
GermanBirnbaum  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
GermanBirne  2Reichel, S. 1998. pers. comm. Note: re. German common names
GermanBirnenbaum  2Reichel, S. 1998. pers. comm. Note: re. German common names
Italianpera  2Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Italianpero  2Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Japanese Rōmajiseiyō-nashi  2Ohwi, J. 1965. Flora of Japan (Engl. ed.).
Portuguesepereira  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Spanishpera  2Hanelt, P., ed. 2001. Mansfeld's encyclopedia of agricultural and horticultural crops. Volumes 1-6
Spanishperal  2Rehm, S. 1994. Multilingual dictionary of agronomic plants
Swedishpäron  2Aldén, B., S. Ryman, & M. Hjertson. 2012. Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
Transcribed Chinesexi yang li as Pyrus communis var. sativa2Wu Zheng-yi & P. H. Raven et al., eds. 1994-. Flora of China (English edition). Note: = Pyrus communis var. sativa
Transcribed Koreanbyeongbaenamu  2Mun-Chan, B. et al. 1986. A checklist of the Korean cultivated plants. Kulturpflanze 34:122.
Annotations
Other Links
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Pathogens
Vouchers
Citations
Pedigree
Description:
Perry Pear seedling selection

Observations

Phenotype Data

CategoryDescriptorDescriptionValueSample SizeStudyInventoryAvailability
CYTOLOGICPLOIDY LEVELNumber of sets of chromosomes.2x - diploid PYRUS.PLOIDY.2013CPYR 2717 .001 PLNot Available
DISEASEFRUIT_SCABRATING OF DAMAGE CAUSED BY FRUIT SCAB0 - 0 (No Fruit to assess) PYRUS.CORVALLIS.2005.FRUITSCABCPYR 2717 .001 PLNot Available