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Details for: PI 638012,
Pyrus pyrifolia
(Burm. f.) Nakai, 'Choju'
Summary
Passport
Taxonomy
Other
Pedigree
IPR
Observation
Summary Data
Taxonomy:
Pyrus pyrifolia
(Burm. f.) Nakai
Cultivar:
'Choju'
Origin:
Collected – Japan
Maintained:
National Clonal Germplasm Repository
Received by NPGS:
11 Mar 2003
Improvement Status:
Cultivar
Form Received:
Scion
Life Form:
Tree
Life Habit:
Tree
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 pyrifolia
(Burm. f.) Nakai
Cultivar:
'Choju'
Origin:
Collected – Japan
Maintained:
National Clonal Germplasm Repository
Received by NPGS:
11 Mar 2003
Improvement Status:
Cultivar
Form Received:
Scion
Life Form:
Tree
Life Habit:
Tree
Source History
Collected
Japan
Elevation:
0m.
Donated
11 March 2003.
Oregon, United States
Donor(s):
Postman, Joseph, USDA-ARS
Accession Names and Identifiers
'Choju'
Type: Cultivar name
Japanese Cultivar
'Chouju'
Type: Cultivar name
alternate spelling
Ichiban
Type: Other or unclassified name
Ichiban Nashi
Type: Trademark name
CPYR 2820
Type: Site identifier
Group: LOCAL
Corvallis local number
ASIAN CULTIVAR
Type: Site identifier
Group: CROPTYPE
Narrative
Choju. A very early season medium size Japanese pear. Origin: Kanagawa, Japan. A cross of Asahi x Kitsukawasei made at the Kanagawa Hort. Exp. Sta. in 1954; selected in 1969; named Choju (meaning 'long life') and released in 1973. The area around Ninomiya in Kanagawa Prefecture is a famous area for 'long life'. Fruit: v. early, med. size, russet skin; Flesh v. sweet, Tree: susc. to fireblight and pseudomonas. Resis. to black spot in Japan. One of the earliest ripening Asian pears available in the United States. Japanese people believe that eating early season ripening fruit promotes long life. Marketed as Ichiban Nashi (tm) by Fowler Nurseries. -- description from: I.Kajiura and Y.Sato. 1990. Recent progress in Japanese pear breeding and descriptions of cultivars based on literature review. Bulletin of the Fruit Tree Research Station (translated from Japanese by S. Wada).
Pyrus pyrifolia
(Burm. f.) Nakai
Genus:
Pyrus
Section:
Pashia
Family:
Rosaceae
Subfamily:
Amygdaloideae
Tribe:
Maleae
Subtribe:
Malinae
Nomen number:
30569
Place of publication:
Bot. Mag. (Tokyo) 40:564. 1926
Verified:
07/13/2011
by ARS Systematic Botanists.
Other conspecific taxa
Pyrus pyrifolia
(Burm. f.) Nakai var.
culta
(Makino) Nakai
(0 active accession[s])
Pyrus pyrifolia
(Burm. f.) Nakai var.
pyrifolia
(1 active accession[s])
Autonyms (not in current use), synonyms and invalid designations
Autonym(s)
Pyrus pyrifolia
(Burm. f.) Nakai f.
pyrifolia
Heterotypic Synonym(s)
Pyrus pyrifolia
(Burm. f.) Nakai f.
stapfiana
(Rehder) Rehder
Pyrus serotina
Rehder
Pyrus serotina
Rehder var.
serotina
Pyrus serotina
Rehder var.
stapfiana
Rehder
Common names
Language
Name
Alternate name
note
seq
Citation
Swedish
sandpäron
2
Aldén, B., S. Ryman, & M. Hjertson.
2012.
Svensk Kulturväxtdatabas, SKUD (Swedish Cultivated and Utility Plants Database; online resource)
Transcribed Korean
dolbaenamu
2
Mun-Chan, B. et al.
1986. A checklist of the Korean cultivated plants. Kulturpflanze 34:123.
Name
References
Annotations
Other Links
Actions
Pathogens
Vouchers
Citations
Pedigree
Date released:
1973
Description:
Asahi x Kitsukawasei
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 2820 .001 PL
Not Available
DISEASE
FRUIT_SCAB
RATING OF DAMAGE CAUSED BY FRUIT SCAB
1 - NO DAMAGE
PYRUS.CORVALLIS.2005.FRUITSCAB
CPYR 2820 .001 PL
Not Available
GENSTOCK
PYRUS CORE SUBSET
A flag to indicate the accession is part of the core subset
PYRUS.CORE.2012
Not Available