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| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
|---|
| 0 | PI 640420 | CN927-202 | Beta vulgaris L. subsp. vulgaris | California, United States | W6 | | Not Available | 2005 | DEVELOPED | 2006 | | | | | Breeding material | Is RR, MM, SfSf, partially inbred line that segregates for genetic ms (A:aa) and Rz1 for resistance to rhizomania caused by Beet necrotic yellow vein virus. Moderately resistant to Curly top virus and virus yellows with moderate nonbolting tendency. As a line it has low vigor but in experimental hybrids produces good root and sugar yield with fair sugar concentration. Has near parental line characteristics but will be most useful as a source of resistance to sugarbeet cyst nematode. Allelism to CN12 (PI 636338) and CN72 (PI 636339) is undetermined. Nematode resistance is not Hs-1 from B. procumbens. 12.5 % germplasm is from Beta vulgaris spp. maritima. | 1684249 | PI 640420 |
| 1 | PI 640421 | CN926-11-3-22 | Beta vulgaris L. subsp. vulgaris | California, United States | W6 | | Not Available | 2005 | DEVELOPED | 2006 | | | | | Breeding material | Is rr, MM, and SfSf with Rz1 resistance to rhizomania caused by Beet necrotic yellow vein virus. Moderately susceptible to Curly top virus and moderately resistant to virus yellows. Has intermediate nonbolting tendency. As a line it has low vigor but in experimental hybrids had near commercial parental line values for sugar concentration and sugar yield. Along with its hybrids may be useful to evaluate nematode resistance under field conditions and to compare its efficacy with that of Hs-1 from Beta procumbens. Allelism to CN927-202, CN12 (PI 636338), CN72 (PI 636339) and CN921-306 is undertermined. About 2% of germplasm is from B. maritima. Nematode resistance appears to be simple, dominant inheritance. | 1684250 | PI 640421 |
| 2 | PI 640422 | CN921-306 | Beta vulgaris L. subsp. vulgaris | California, United States | W6 | | Not Available | 2005 | DEVELOPED | 2006 | | | | | Breeding material | Is rr, MM, SfSf, and segregates for resistance to rhizomania (Rz1), caused by Beet necrotic yellow vein virus, and genetic ms (A:aa). About 27% of its germplasm is from B. vulgaris spp. maritima through C51, C26 (PI 610488) and C27 (PI 610489) in a C931 (PI 636341) background. It segregates for resistance to sugarbeet cyst nematode. Retains some wild beet traits in terms of growth habit and ease of bolting. Seed stalks are lax and readily lodge. Useful only as a potential source of resistance to nematode. | 1684251 | PI 640422 |