Variability, heritabiiity and genetic advance of some important traits in rice (Oryza Sativa L.)

摘要

Variability and heritability studies in 21 genotypes of rice indicated significant differences among all the genotypes for all the characters studied. Considerable amount of variability was observed for all the 14 quantitative characters viz., plantheight, days to 50 per cent flowering, number of productive tillers per plant, panicle length, number of spikelets per panicle, number of filled grains per panicle, particle weight, spikelet sterility per centage, 100 grain weight, dry matter productionper plant, grain yield per plant, leaf area per plant, harvest index and length - breadth ratio of grain. High berftabiltty coupled with high genetic advance was observed for number of spikelets per panicle and number of filled grains per panicle, indicating the predominance of additive gene action in controlling these characters. Hence selection could be effective on these traits for improving the yield.