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ACCESSIONPLANT NAMETAXONOMYORIGINGENEBANKIMAGEAVAILABILITYRECEIVEDSOURCE TYPESOURCE DATECOLLECTION SITECOORDINATESELEVATIONHABITATIMPROVEMENT LEVELNARRATIVE
0PI 638018Du LiPyrus betulifolia Bunge Shaanxi Sheng, ChinaCORImage2004COLLECTED02/2004From the mountains of northwest Shaanxi in the wild pear forests of Huang Ling.35.58334000, 109.250000000Cultivated materialCollected in the wild pear forests of Huang Ling in Shaanxi Province, China. John Wells traveled to Shaanxi Province in February, 2004 and was given this seed by Mr. Xu Pu Gang at Xia-Ja Gou Village in Yangling County, the grower at Northwest Sci-Tech University of Agriculture and Forestry, Yangling Demonstration Farm. This is a cold-hardy form of P. betulifolia, from the northern limit of the natural range of this species. It is used as a rootstock for Asian pears and European pears in this part of China. Mr. Xu purchases the whole fruit with stem, and cleans and dries the seed in October, November and December. In January, approximately 50-60 days before soil temperatures increase, these dried seeds are placed in sand stratification. In early March the seeds are planted at the density of 15 x 30 cm, at the rate of two kilograms of seed per one Mu (1/6 acre). As many as 20,000 seedling/Mu are produced but only the best, about 10,000/Mu are budded in September. It is said to produce a dwarf tree that is drought and waterlog resistant, and is of much interest to the pear industry of the pacific northwest United States as a potential dwarfing rootstock for cultivated pears. -- information from John Wells, 2 March, 2004.

This seedlot was collected from the same general region as PI 541007, received in 1989.

1656327PI 638018
1PI 541007Du LiPyrus betulifolia Bunge Shaanxi Sheng, ChinaCORImage1989COLLECTEDShanxi Province38.00000000, 106.000000002000Wild material Ma Shu Shang's (Northwestern University in Xion) description: 'The wild trees scattered in the mountains in northern Shaanxi (including Huang Ling County). The fruits are picked and the seeds collected by local farmers, who sale the dried seeds to the nurseryman.' -- email from John Wells, Hood River Grower Shipper Association, 11/2003.

Survives -35 F in Alberta, Canada

Pyrus betulifolia (Du Li) native to Shanxi Province forest/mountain region. This material was collected about 38 degrees N latitude and 106 degrees east longitude in mountainous regions that drop to 40 degrees celsius in winter. elevation 2000 meters(?). Received 3.6 oz of seed (about 3600 seed).

Information sheet 116

1435943PI 541007
2PI 541004OSU-3 seedling 4Pyrus betulifolia Bunge Oregon, United StatesCOR1988DEVELOPEDBreeding materialMedium fruit. Parent tree was selected by Reimer1435940PI 541004
3PI 540965OSU-3 seedlingPyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding materialAphid resistant1435901PI 540965
4PI 540966OSU-1 seedling APyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding material1435902PI 540966
5PI 540969OSU-3Pyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding material1435905PI 540969
6PI 540971P. betulifolia - ItalyPyrus betulifolia Bunge ChinaCORImage1983DEVELOPEDBreeding material1435907PI 540971
7PI 540972P. betulifolia - ItalyPyrus betulifolia Bunge ChinaCORImage1983COLLECTEDBreeding material1435908PI 540972
8PI 540974P. betulifolia - CulbertsonPyrus betulifolia Bunge CORImage1983Breeding materialMay be hardier than betulifolia from south China1435910PI 540974
9PI 540975P. betulifolia - CulbertsonPyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding materialNot tested for blight resistance, white pubescence on tips1435911PI 540975
10PI 540976P. betulifolia - CulbertsonPyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding materialNot tested for blight res., white pubescence on branch tips1435912PI 540976
11PI 540977P. betulifolia - CulbertsonPyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding materialNot tested for blight res., white pubescence on branch tips1435913PI 540977
12PI 540979P. betulifolia - CulbertsonPyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding materialNot tested for blight res., white pubescence on branch tips1435915PI 540979
13PI 540980OSU-2 x OSU-1 Pyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding material1435916PI 540980
14PI 540981'OPR 259'Pyrus betulifolia Bunge Oregon, United StatesCOR1983DEVELOPEDBreeding materialOPR (Oregon Pear Rootstock) No. 259 is a seedling of P. betulifolia Talent No. 3; Crown gall resistant clone No. 1 selected by M.N. Westwood.1435917PI 540981
15PI 540982'OPR 260'Pyrus betulifolia Bunge Oregon, United StatesCOR1983DEVELOPEDBreeding materialOPR (Oregon Pear Rootstock) No. 260 is a seedling of P. betulifolia Talent No. 3; Crown gall resistant clone No. 2 selected by M.N. Westwood.1435918PI 540982
16PI 540983'OPR 261'Pyrus betulifolia Bunge Oregon, United StatesCOR1983DEVELOPEDBreeding materialOPR (Oregon Pear Rootstock) No. 261 is a seedling of P. betulifolia Talent No. 3; Crown gall resistant clone No. 3 selected by M.N. Westwood.1435919PI 540983
17PI 540984'OPR 262'Pyrus betulifolia Bunge Oregon, United StatesCOR1983DEVELOPEDBreeding materialOPR (Oregon Pear Rootstock) No. 262 is a seedling of P. betulifolia Talent No. 3; Crown gall resistant clone No. 4 selected by M.N. Westwood.1435920PI 540984
18PI 540985'OPR 263'Pyrus betulifolia Bunge Oregon, United StatesCOR1983DEVELOPEDBreeding materialOPR (Oregon Pear Rootstock) No. 263 is a seedling of P. betulifolia Talent No. 3; Crown gall resistant clone No. 5 selected by M.N. Westwood.1435921PI 540985
19PI 540986'OPR 264'Pyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding materialOPR (Oregon Pear Rootstock) No. 264 is a seedling of P. betulifolia Talent No. 3; Crown gall resistant clone No. 6 selected by M.N. Westwood.1435922PI 540986
20PI 540987'OPR 265'Pyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding materialOPR (Oregon Pear Rootstock) No. 265 is a seedling of P. betulifolia Talent No. 3; Crown gall resistant Clone No. 7 selected by M.N. Westwood.1435923PI 540987
21PI 540988'OPR 266'Pyrus betulifolia Bunge Oregon, United StatesCOR1983DEVELOPEDBreeding materialOPR (Oregon Pear Rootstock) No. 266 is a seedling of P. betulifolia Talent No. 3; Crown gall resistant Clone No. 8 selected by M.N. Westwood.1435924PI 540988
22PI 540989OSU-3 seedling BPyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding materialAphid resistant1435925PI 540989
23PI 540990OSU-3 seedling CPyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding materialAphid resistant1435926PI 540990
24PI 540991OSU-3 seedlingPyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding materialAphid resistant1435927PI 540991
25PI 540992OSU-1Pyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding material1435928PI 540992
26PI 540994OSU- 2 x OSU-1Pyrus betulifolia Bunge Oregon, United StatesCORImage1983DEVELOPEDBreeding materialBlight resistant1435930PI 540994
27PI 617510P. betulifolia OSU selectionPyrus betulifolia Bunge ChinaCORImage1983COLLECTEDBreeding material1010041PI 617510
28PI 540949P. betulifolia 29-20 No. 3Pyrus betulifolia Bunge Oregon, United StatesCORImage1982DEVELOPEDBreeding material1435885PI 540949
29PI 540948IRP 139-1Pyrus betulifolia Bunge Oregon, United StatesCORImage1981DEVELOPEDBreeding materialOriginal seedlot collected by Reimer in 19181435884PI 540948
30PI 322707P. betulifolia - UkrainePyrus betulifolia Bunge UkraineCORImage1981COLLECTED09/14/1967Cultivated materialBudsticks collected by Howard J. Brooks, agricultural explorer for the USDA Plant Industry Station, Crops Research Division, Beltsville, Maryland. Collected in the USSR and received in Beltsville on 14 September, 1967. Collector number B-35: Pyrus betulaefolia from botanical garden at Askaniya-Nova, Ukraine. Fruit with no grit. -- USDA Plant Inventory No. 175.

No grit in the fruit

1239935PI 322707
31PI 540942P. betulifolia 8-5Pyrus betulifolia Bunge Oregon, United StatesCORFRUIT1981DEVELOPEDBreeding materialDescription: Pyrus betulifolia was introduced at the Arnold Arboretum in 1882 from the mountains near Peking. The pears have no value as a source of food but the trees proved to be promising. Although Reimer of Oregon has reported that this species is susceptible to fire blight in Oregon, this has not been the case at the Arnold Arboretum nor anywhere else in the East. In addition, the seedlings have been reported to be free of leaf-blight. The young plants can grow vigorously from seeds or cuttings and can bud throughout the long season. They are also compatible with many other pears in China. And, because this species is widely distributed in China it is possible to obtain seeds that would give rise to trees that do not deviate from the parents.1435878PI 540942
32PI 540943'OPR 110'Pyrus betulifolia Bunge Oregon, United StatesCORImage1981DEVELOPEDBreeding materialOPR (Oregon Pear Rootstock) No. 110 is Talent fire blight resistant P. betulifolia clone # 1. Originated from seed that F. Reimer collected in China. -- from M.W. Westwood rootstock inventory 11/17/19611435879PI 540943
33PI 540944'OPR 111'Pyrus betulifolia Bunge Oregon, United StatesCORFRUIT1981DEVELOPEDBreeding materialOPR (Oregon Pear Rootstock) No. 111 is Talent P. betulifolia clone # 2. Originated from seed that F. Reimer collected in China. Fire blight resistant. -- from M.W. Westwood rootstock inventory 11/17/19611435880PI 540944
34PI 540946'OPR 114'Pyrus betulifolia Bunge Oregon, United StatesCORFRUIT1981DEVELOPEDBreeding materialOPR (Oregon Pear Rootstock) No. 114 is Talent fire blight susceptible P. betulifolia clone # 5. Originated from seed that F. Reimer collected in China. -- from M.W. Westwood rootstock inventory 11/17/19611435882PI 540946
35PI 541737B-37552Pyrus hybr. UncertainCORImage1983COLLECTED10/03/1966Talent, Southern OregonWild materialThis seedlot, received from M. Westwood in 1983, carries the same B number (B-37552) as PI 541718 which was wild collected in China. This seedlot is presumed to be open pollinated seed collected in Oregon, from a seedling or seedlings of the original seedlot. Ten seedlings of PI 541737 were grown from this seed accession in 2004. The young seedlings are variable, some with lobed juvenile leaves typical of P. betulifolia, others with non-lobed juvenile leaves. Five seedlings were selected on 6/20/2005 to be planted in the field to perpetuate this accession. These seedlings could be back-crossed to PYR 648.001 (clone of PI 541718) which is presumably their parent if it is desired to concentrate the genes from the original accession. Five seedlings from this same seedlot were grown out in 1989 at NCGR and later discarded because they were not P. betulifolia. - jp 6-20-20051436673PI 541737
36PI 541738P. fauriei x P. betulifolia-1Pyrus hybr.Oregon, United StatesCOR1983DEVELOPEDBreeding materialRootstock clone1436674PI 541738
37PI 541739P. fauriei x P. betulifolia-1 Pyrus hybr.Oregon, United StatesCOR1983DEVELOPEDBreeding materialRootstock clone1436675PI 541739
38PI 541769P. pashia x P. betulifoliaPyrus hybr.Oregon, United StatesCOR1983DEVELOPEDBreeding material1436705PI 541769
39PI 541770P. betulifolia x P. calleryana Pyrus hybr.Oregon, United StatesCOR1983DEVELOPEDBreeding materialPossibly a good rootstock clone1436706PI 541770
40PI 541771P. betulifolia-2 x P. calleryana-2 Pyrus hybr.Oregon, United StatesCOR1983DEVELOPEDBreeding materialPossibly a very good rootstock clone1436707PI 541771
41PI 541775P. betulifolia x P. pyrifolia Pyrus hybr.Oregon, United StatesCORImage1983DEVELOPEDBreeding material1436711PI 541775
42PI 541780P-79 x P. betulifoliaPyrus hybr.Oregon, United StatesCORImage1983DEVELOPEDBreeding materialBlight-resistant rootstock1436716PI 541780
43PI 541783P. betulifolia x P. calleryana-5 Pyrus hybr.Oregon, United StatesCOR1983DEVELOPEDBreeding materialPossibly a very good rootstock clone, blight resistant1436719PI 541783
44PI 541784P. betulifolia-2 x P-12Pyrus hybr.Oregon, United StatesCOR1983DEVELOPEDBreeding materialPossibly a very good rootstock clone, blight resistant1436720PI 541784
45PI 541785P. betulifolia-2 x Farmingdale Pyrus hybr.Oregon, United StatesCORImage1983DEVELOPEDBreeding materialPossibly a very good rootstock clone, blight resistant1436721PI 541785
46PI 541786Burkett x P. betulifolia Pyrus hybr.Oregon, United StatesCORImage1983DEVELOPEDBreeding materialPossibly a very good hybrid rootstock clone, blight resist.1436722PI 541786
47PI 541787Old Home x P. betulifolia-1Pyrus hybr.Oregon, United StatesCORFRUIT1983DEVELOPEDBreeding materialBlight resistant1436723PI 541787
48PI 541788Old Home x P. betulifolia-1 Pyrus hybr.Oregon, United StatesCORImage1983DEVELOPEDBreeding materialBlight resistant rootstock1436724PI 541788
49PI 541790P. betulifolia-1 x P-12 Pyrus hybr.Oregon, United StatesCORFRUIT1983DEVELOPEDBreeding materialBlight resistant, possibly a very good rootstock clone1436726PI 541790
50PI 541791P. betulifolia-1 x P-79 Pyrus hybr.Oregon, United StatesCORFRUIT1983DEVELOPEDBreeding materialBlight resistant, possibly a very good rootstock clone1436727PI 541791
51PI 541798P. betulifolia x P. pyrifolia Pyrus hybr.Oregon, United StatesCORImage1983DEVELOPEDBreeding material1436734PI 541798
52PI 541800Nelis x P. betulifoliaPyrus hybr.Oregon, United StatesCORImage1983DEVELOPEDBreeding materialPossibly a very good rootstock clone, pear decline resistant1436736PI 541800
53PI 617526P. betulifolia 2 x P. calleryana 2 Pyrus hybr.Oregon, United StatesCOR1983DEVELOPEDBreeding materialPossibly a good rootstock clone1014214PI 617526
54PI 541718P. betulifolia hybridPyrus hybr. ChinaCOR1981COLLECTEDWild materialDocumentation indicates that seed was wild collected in China. Received at NCGR-Corvallis as scions and propagated as a single clone. - J. Postman 6/20051436654PI 541718