Multiseasonal Assessment of Genetic Variability, Heritability and Genetic Advance in Rice (Oryza sativa L.): Implications for Trait Improvement through Selection
Arpitha, K, Jagan Mohan Rao, P, Sujatha, P, Parimala, K, S.N.C.V.L. Pushpavalli, Raghavendra, K.
Journal of Advances in Biology & Biotechnology · pp. 776–782 · Published 11 Jul 2025
10.9734/jabb/2025/v28i72595Abstract
Variation in genetic composition within a population is often referred to as genetic variability, which serves as the basis for developing breeding techniques aimed at further crop improvement. The study assessed genetic variability, heritability and genetic advance in 14 yield related traits across 21 paddy genotypes during the 2022 and 2023 Kharif seasons. The traits include; leaf blade length (cm), leaf blade width (cm), time of heading, stem length (cm), panicle length (cm), number of panicles per hill, days to maturity, 1000-grain weight (g), grain length (mm), grain width (mm), decorticated grain length (mm), decorticated grain width (mm), amylose content in the endosperm, and awn length. Phenotypic variation was consistently higher than genotypic variation, indicating environmental influence. Despite low to moderate genetic variability, moderate to high genetic advance as percent of mean was observed for all traits, suggesting good potential for genetic improvement through selection.
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