Abstract

                                F2 generations of 21 crosses were evaluated for the genetic parameters as well as association of certain yield components in rice. The phenotypic and genotypic coefficients of variation were high for productive tillers/plant and 100-grain weight. These two traits, besides filled grain/panicle also registered high heritability (narrow sense) coupled with high genetic advance. Among the yield components, productive tillers/plant and 100-grain weight had significant correlation with grain yield/plant, in addition to exhibiting direct positive effects on it. For increasing yield potential, selection would be more effective when aimed at isolation of purelines with high number of productive tillers per plant coupled with high test weight grains.

Key words : Rice, F2 generation, Genetic parameters.