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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 | | |
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| 0 | PI 639689 | 'Bozoisky-II' | Psathyrostachys juncea (Fisch.) Nevski | Utah, United States | PVPO | | Not Available | 2005 | DEVELOPED | 06/02/2005 | | | | | Cultivar | Selected for seedling vigor (emergence from a deep planting depth), seed mass, seed yield, vegetative vigor, total dry matter production, and response to drought. Has a much broader genetic base than other Russian wildrye cultivars and has been evaluated extensively on rangeland sites in western United States. Seedling establishment has been equal to or greater than commercially available cultivars. When combined across two locations, itI is significantly taller (92.9 cm) than Mankota (84.3 cm) and Tetracan (85.2 cm). At both locations, it has a significantly longer inflorescence than Bozoisky-Select (10.8 for the former versus 9.0 cm for the latter) and Mankota (8.5 cm). It is a diploid (2n=2x=14) and has the same ploidy level as the commercially available cultivars Bozoisky-Select, Mankota, Swift, and Vinall. Selection emphasis was for increased seedling vigor during establishment. In seeded trials, when planted on a pure live seed basis (PLS), it had significantly more seedlings per unit area (m2) than did Bozoisky-Select and Tetracan. A neighbor-joining tree demonstrated that Bozoisky-II contains substantially more genetic diversity than current diploid and tetraploid cultivars. The average similarity coefficient (0.5823) among genotypes of this line was significantly less (P<0.05) than Cabree, Tetracan, and Tetra-1 and numerically less than the other five cultivars that were evaluated. Analysis of molecular variance indicated that it contains substantially more DNA polymorphisms than the other eight cultivars that were evaluated. | 1678426 | PI 639689 |