Unveiling the Rice Hybrid Parental Lines - A Study of Genetic Variability for Yield Attributing Traits (Oryza sativa. L)

Fifty-five rice hybrid parental lines along with five checks were evaluated in augmented block design (ABD) at ICAR-IIRR Hyderabad, to determine the genetic variability, heritability and genetic advance for ten traits during Rabi,2023-24. Analysis of variance showed that significant variation was present in the hybrid parental lines studied. The phenotypic coefficient of variation was found to be higher than the genotypic coefficient of variation for all the traits. High GCV (Genotypic Coefficient of Variation) and PCV (Phenotypic Coefficient of Variation) levels were recorded for number of productive tillers (20.12% and 22.28%) and grain yield per plant (21.82% and 23.88%) respectively. Heritability was high for all the traits studied. High heritability coupled with high genetic advance as percent of mean was recorded for majority of the traits suggesting importance should be given to these characters during selection.