Evaluation of variability, heritability and genetic advance in relation to seed yield and its attributing traits in rice (Oryza sativa L.)

Abstract

The present study was distributed for analyses the genetic heritability, variability and genetic advance for 10 quantitative traits. Use Randomized Block Design (RBD) with three replications for grown the 58 genotypes. Recorded the observations on five randomly selected plants from each genotype in each replication for the 10 characters viz. days to 50% flowering, days to maturity, plant height, no. of productive tillers, panicle length, grain per panicle, 1000 seed weight, biological yield, harvest index and grain yield per plant. The high genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) was observed for harvest index, grain yield per plant and grain per panicle. There was least influence of environment within the expression of those traits. High heritability as well as high genetic advance recorded for harvest index, grain yield/ plant, biological yield and grain per panicle, As a result, genotypes selection will be done directly through these characters for further improvement of genotypes of Oryza sativa. Based on the findings of the preceding research, it will be concluded that due weightage should incline to harvest index, grain yield/plant and bioological yield and grain per panicle while enforcing genetic improvement through selection in rice.