Estimation of genetic parameters of variability for yield and its attributing traits in CMS lines of hybrid rice

Only four rice genotypes were planted at Breeder Seed Production Centre, College of Agriculture, Pantnagar, in Randomized Block Design with three replications, during kharif-2013 and 2014. The experiment was conducted to study quantitative traits to examine the nature and magnitude of variability, heritability and gen83etic advance. This study was conducted with the aim of evaluating genetic parameters in three parental lines of hybrid rice and one check. High genotypic and phenotypic coefficient of variation was exhibited by seed setting percentage, seed yield (g/m²), plant height (cm), number of spikelets panicle⁻¹, total spikelet test weight (g/m²), total number of spikelets panicle⁻¹, productive tillers plant⁻¹ and total tillers plant⁻¹. High heritability accompanied with high genetic advance was shown by plant height (cm), productive tillers plant⁻¹, total tillers plant⁻¹, number of spikelets panicle⁻¹, seed setting percentage, test weight and seed yield plant⁻¹. This indicated that these characters are governed by additive gene action and selection for these traits would be effective.