Assessment of genetic parameters for various quantitative and qualitative traits in hybrid rice (Oryza sativa L.)

摘要

The present investigation was carried out during khari/2012 and khari/2013 at research cum instructional farm IGKV, Raipur to evaluate the genetic parameters for thirty three quantitative and qualitative traits in thirty three rice genotypes. Analysisof variance revealed highly significant differences for almost all the traits under study. The characters, viz., pollen fertility percent, productive tillers per plant, harvest index, fertile spikelet per panicle, sterile spikelets per panicle, grain yield per plant, biological yield per plant, seed index, kernel L/B ratio and head rice recovery exhibited high genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV). Small differences between GCV and PCV were recorded forall the characters studied which indicated less influence of environment on these characters. Pollen fertility percent, fertile spikelet per panicle, sterile spikelet per panicle, total spikelet per panicle, spikelet fertility percent, productive tillersper, days to 50% flowering, flag leaf area, plant height, 100 seed weight, grain yield per plant, biological yield per plant, harvest index, head rice recovery, brown rice L/B ratio and kernal L/B ratio exhibited high heritability coupled with high genetic advance as percent of mean, suggesting that These characters are governed by additive gene action direct selection for the improvement of these characters may be rewarding.