Details for: PI 541805, Pyrus pyrifolia (Burm. f.) Nakai, 'Koyoma Pear'

Summary Data

Taxonomy:

Pyrus pyrifolia (Burm. f.) Nakai

Cultivar:

'Koyoma Pear'

Origin:

Developed – Oregon, United States

Maintained:

National Clonal Germplasm Repository

Received by NPGS:

16 Jan 1987

Improvement Status:

Cultivar

Form Received:

Cutting

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 (4 total. Click on image for more.)

Core Passport Data

Taxonomy:

Pyrus pyrifolia (Burm. f.) Nakai

Cultivar:

'Koyoma Pear'

Origin:

Developed – Oregon, United States

Maintained:

National Clonal Germplasm Repository

Received by NPGS:

16 Jan 1987

Improvement Status:

Cultivar

Form Received:

Cutting

Life Form:

Tree

Life Habit:

Tree

Source History

Developed

Oregon, United States

Developer(s):

Rombough, Lon J.

Donated

16 January 1987.
Oregon, United States
Comment: Received from Rombough to NCGR-Corvallis
Donor(s):

Rombough, Lon J.

Accession Names and Identifiers

'Koyoma Pear'

Type: Cultivar name

ASIAN CULTIVAR

Type: Site identifier

Group: CROPTYPE

CPYR 1648

Type: Other or unclassified name

Group: LOCAL

Corvallis local number

Narrative

A pear selection developed by Lon Rombough of Aurora, Oregon as a seedling of cultivar Nijissiki in the early 1980s. He presumed it to be a hybrid with a European cultivar, however the tree as grown at the USDA genebank appears to be pure Pyrus pyrifolia. Named in honor of Albert Koyama.one of Mr. Rombough's mentors at the University of California, Davis.

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.

Annotations

The Taxonomic Name Of The Accession When It Was Received: 31 Jul 1989, from Pyrus spp. to Pyrus hybr.
Taxonomic Re-Identification: 14 Aug 2013, from Pyrus hybr. to Pyrus pyrifolia (Burm. f.) Nakai

Observations

Phenotype Data

Category	Descriptor	Description	Value	Study	Inventory	Availability
CYTOLOGIC	PLOIDY LEVEL	Number of sets of chromosomes.	2x - diploid	PYRUS.PLOIDY.2013	CPYR 1648 .001 PL	Not Available
DISEASE	FRUIT_SCAB	RATING OF DAMAGE CAUSED BY FRUIT SCAB	3 - (1 = NO DAMAGE, 9 = SEVERE DAMAGE)	PYRUS.CORVALLIS.2005.FRUITSCAB	CPYR 1648 .001 PL	Not Available
DISEASE	Fabraea Leafspot Disease	Observed presence/severity of Fabraea Leafspot Disease	2	PYRUS.CORVALLIS.2003.FABRAEA	CPYR 1648 .001 PL	Not Available