Vol. 12, Special Issue 7 (2023)

Author(s):
Deepak Saran, Deepak Gauraha, Abhinav Sao, Rohit Kumar and Vivek Kumar Sandilya

Abstract:
Rice (Oryza sativa L.) is a significant cereal crop with high agricultural importance. In this study, the genetic variability and heritability of various quantitative traits related to grain yield were investigated in different rice genotypes. The experiment was conducted at Raipur Chhattisgarh, India, using a randomized complete block design with three replications. The analysis of variance revealed significant variations among the rice genotypes for all the traits studied. The genotypic and phenotypic coefficients of variance indicated a higher magnitude of phenotypic variation compared to genotypic variation, suggesting the influence of genotype-environment interaction. The estimation of heritability in broad sense and genetic advance as a percentage of mean provided insights into the inheritance pattern of the traits. The results showed that several traits, such as days to 50% flowering, plant height, effective tillers per plant, filled grains per panicle, spikelet fertility, harvest index, biological yield, seed yield per plant, and 100-seed weight, exhibited high heritability estimates and significant genetic advances. These findings suggest the presence of additive and non-additive gene actions controlling these traits, highlighting their potential for selection and improvement through breeding programs. The study provides valuable information for developing selection criteria to enhance rice yield and its associated characteristics.