Seed dormancy in summer rice (Oryza sativa L.) [in Bangladesh]
1991
Biswas, J.K. | Haque, M.Z. | Islam, M.S.
Seed dormancy of 14 aus rice varieties (Bangladesh varieties) at the pre and post-maturity stages was determined at 25 deg. C, 30 deg. C and 35 deg. C. Germination percentages increased from pre-maturity to post-maturity stages in the modern varieties, BRI, BR6, BR12, BR14, BR15 and BR16 in threshed condition. BR1 and BR6 seeds on intact panicles were strongly dormant at maturity stage at 25 deg.C and 30 deg.C. Temperature and maturity interaction was highly significant. Varietal selection was considered important for risk areas where flash flood and lodging at grain ripening stage and absence of adequate drying facilities after harvest may cause unwanted grain germination in the field and on the threshing floor
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