Studies on PCV, GCV, Heritability, and Genetic Advance in Rice Genotypes for Yield and Yield Components

The present experiment was carried out in twelve genotypes including IRRI introgression lines and a Japonica cultivar to analyse the genetic variability, heritability, and genetic gain. Significant differences were observed among the genotypes. All the traits under study recorded a high phenotypic coefficient of variation (PCV) than the genotypic coefficient of variation (GCV) indicating the presence of environment controlling the traits. But, the less difference between PCV and GCV implies that the involvement had a negligible role in the trait expression. High PCV and GCV were observed for the characters plant height, number of productive tillers, 1000 grain weight, L/B ratio, protein content, phenol content, and reducing sugar, representing that these characters in genotypes are contributed by additive gene action and the direct selection will improve the trait easily. Among the traits studied, high heritability and genetic advance were obtained for plant height, number of days to 50% flowering, panicle length, number of grains per panicle, grain breadth, L/B ratio, protein content, phenol content, and ascorbic acid, representing that these characters are predominant in additive gene action.