Vol. 8, Special Issue 9, Part M (2024)

For the variability study of the rice (Oryza sativa L.) among fifty eight genotypes, nineteen characters were used. In genetic variability study phenotypic coefficient of variation is greater than genotypic coefficient of variation indicating the that effect of environment is very negligible where, plant height, panicle length, flag leaf length, sterile grain per plant, stem thickness, stem length, number of panicles per plant, 1000 grain weight, decorticated grain breadth, decorticated grain length breadth ratio and grain yield per plant had high genotypic coefficient of variation. Heritability is the heritable portion of phenotypic variance and it is a good index of the transmission of characters from parents to the offspring. The present study reveals that stem length is highly heritable character among all the characters and plant breeder can select the long stem length genotypes, as the character is highly heritable followed by plant height, panicle length, flag leaf length, time of maturity and 1000 weight per plant etc. Most of the traits showed high value of GA as % mean, genotypes with high genetic advance are governed by additive genes and selection for these traits will be useful in improving grain yield.