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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 | NSL 439502 MAP | C/M Mapping Population of Rice | Oryza sativa L. | Louisiana, United States | NLGRP | | Not Available | 2005 | DEVELOPED | | | | | | | The 2 parents of this mapping population have been assigned new PI Numbers to reflect their association with this Mapping Population: Cocodrie, PI 606331, newly assigned PI 641931 MAP and MCR01-0277, PI 641932 MAP. The establishment of a DH mapping population was initially requested during the multi-state rice breeders conference held in 2002 in Louisiana. The objective was to further understand the molecular basis of sheath blight resistance. This population is to be used by USDA funded RiceCAP, a multiple institutional effort, for studies in 2006, and following years. The Cocodrie parent is a high yielding cultivar but is susceptible to sheath blight with a 7-8 rating (0-9 scale where 0=immune and 9=very susceptible) while MCR01-0277 is resistant with a rating of 3. The parent Cocodrie matures in appros. 120 days (from seeding to harvest maturity and normal planting dates in Louisiana) while MCR01-0277 matures in approx. 127 days under similar conditions. This results in moderate transgressive segregation for extremely late maturity. Phenotypic observation of the DH lines indicated that wide genetic diversity exists for agronomic traits, including seedling vigor (where 1=extra vigorous and 9=very weak, range 3-8), plant height (range70 to 146 cm), heading date (range 76 to 93 days), and sheath blight rating (0-9, range 3 to 8). | 1689247 | NSL 439502 MAP |