Studies on Variability, Heritability and Genetic Advance for Yield and its Related Traits in Rice (Oryza sativa L) Genotypes

Abstract

The present study consists of 32 rice genotypes and three check verities that were evaluated at Crop Research Station Masodha under the supervision ANDUAT, Ayodhya from July to November 2019 to estimate genetic variability, heritability and genetic advance for grain yield and 12 yield associated traits. The estimates of genotypic and phenotypic variances for the characters like plant height, effective tillers per plant, number of grains per panicle, grain yield per plant, harvest index and 1000 grain weight, genotypic variance contributed larger in phenotypic variance. The combined analysis of variance revealed statistically significant differences (p< 0.05) indicating the existence of genetic variability among the 32 genotypes for all the traits studied. Higher PCV and GCV values were exhibited by L/B ratio, number of tillers per plant, length of panicle and test weight which was suggests the possibility of improving this trait through selection. The highest heritability was recorded for days to 50 percent flowering followed by number of seed per panicle, plant height, days to maturity and seed yield per plant. High to medium heritability coupled with high GCV and high genetic advance as percentage of means were exhibited for plant height, number of tillers per plant, length of panicle and test weight.