Estimates of Genetic Parameters for Yield and Quality Traits in Rice (Oryza sativa L.)

The present investigation has been conducted with twenty-five rice (Oryza sativa L.) genotypes to determine the nature of genetic variability, heritability (broad sense) and genetic advance over mean for yield and quality traits. The experiment was conducted in RBD with three replications during Kharif, 2010 for some quantitative, physical and cooking quality traits. The analysis of variance showed highly significant differences among genotypes for all the quantitative traits studied except flag leaf width, while physical and cooking quality traits showed significant differences only for hulling percentage, milling percentage and head rice recovery. High GCV and PCV were recorded for number of spikelets per panicle, number of productive tillers per hill and grain yield per hill. In present study all the traits exhibited high heritability. High heritability coupled with high genetic advance as per cent of mean were recorded for number of spikelets per panicle, plant height and biological yield per hill. Among the quality traits, high GCV and PCV were found for volume expansion ratio, L/B ratio, kernel breath before cooking and kernel length before cooking, while rest characters showed low magnitude of GCV and PCV. High heritability was observed for all the quality traits studied, while none of the character exhibited high heritability along with high genetic advance as per cent of mean.