Estimation of Phenotypic Coefficients of Variation (PCV), Genotypic Coefficients of Variation (GCV), Heritability and Genetic Gain for Yield and its Components in Rice Landraces of Odisha

摘要

The present investigation was carried out to study genetic variability in sixty-four low land rice genotypes (including fifty-five landraces of Odisha) for twelve traits. Analysis of variance (ANOVA) revealed significant differences among the genotypes for all the studied characteristics. Flag leaf area, effective tillers per plant, filled grains per panicle, 100-grain weight and harvest index had moderate to high phenotypic coefficients of variation (PCV) and genotypic coefficients of variation (GCV) estimates suggesting that these traits are under the influence of genetic control and less affected by the environment. In the present study, all the characters exhibited a high degree of heritability and among those flag leaf area, number of filled grains per panicle, 100-grain weight, harvest index and grain yield per plant had high genetic advance indicating the presence of additive gene effect and hence selection based on phenotypic performance for these traits would be effective. Filled grains per panicle and flag leaf area followed by 100-grain weight and harvest index are important characters having high heritability, genetic advance as well as high coefficient of variation which should be considered while selecting for high yield.