Using rice germplasm collections to develop breeding strategies
2002
Dilday, R.H. | Moldenhauer, K.A. | Gibbons, J.W. | Yan, W.G.
The USDA-ARS rice germplasm working collection contains 17,279 accessions from 110 countries or regions. Data for more than 30 different descriptors have been collected and are part of the germplasm resources information network (GRIN). The descriptors include allelopathy, amylose content, days from emergence to flowering, disease resistance, grain type, herbicide tolerance, kernel length, kernel weight, lodging, plant height, salt tolerance, yield, etc. A broad range of genetic variability is present in GRIN for each descriptor. For example, amylose content ranges from 0% to 53%, days from emergence to flowering from 37 to 219, kernel length from 3.0 to 9.9 mm, kernel length/width ratio from 1.0 to 8.0, plant height from 41 to 208 cm, protein content from 1.7% to 13.6%, salt tolerance rating from 0.0 to 5.6, straighthead rating from 3.0 to 9.0, and 1,000-kernel weight from 6.9 to 46.0 g. Some accessions are tolerant of nonselective herbicides such as glyphosate and sulfosate whereas other accessions apparently are allelopathic to weed species such as ducksalad (Heteranthera limosa) and barnyardgrass (Echinochloa crus-galli).
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Эту запись предоставил International Rice Research Institute