Variability and genetic parameters studies in rice (Oryza sativa L.)

Abstract

The present investigation was carried out on genetic variability and heritability with 27 local and improved genotypes of rice in RBD with three replications at Research farm, RARS, Karjat during kharif, 2018. The results revealed that, analysis of variance indicated positively significance for all the characters under study. Considerable amount of genetic variability was observed for all the characters. Phenotypic coefficients of variation (PCV) was observed greater in magnitude over the respective genotypic coefficients of variation (GCV). The magnitude of phenotypic coefficient of variation was reported highest for straw yield per plant (43.74) followed by 1000 grain weight (g) (30.33), number of tillers per plant (27.513) and plant height (19.143). The magnitude of genotypic coefficient of variation was highest for straw yield per plant (34.77) followed by 1000 grain weight (g) (30.25), number of tillers per plant (26.87), plant height (18.98) and number of filled spikelets per panicle (14.86). High heritability coupled with high genetic advance was observed for plant height, number of spikelets per panicle, number of filled spikelets per panicle indicating that these characters can be improved through direct selection since the additive gene action is being involved in the inheritance of these characters. The characters number of spikelets per panicle expressed maximum genetic advance (46.39) followed by plant height (44.07), number of filled spikelets per panicle (41.65), days to maturity (12.54). Hence it is suggested that these characters could be of great importance for selecting better genotype in the rice improvement programme.