Assessment of Heritability and Genetic Advance in Segregating Generations of Rice (Oryza sativa L.) for Grain Yield and Yield Contributing Traits under Upland Conditions

The study was conducted during the Kharif season of 2024 under upland conditions at the Regional Rice Research Station, N.A.U., Vyara, to evaluate narrow-sense heritability and genetic gain from the segregating generations of four distinct rice crosses, namely NVSR 2565 × NVSR 2272, NVSR 2565 × Dhanhar Black, Devli Kolam × NVSR 2272 and Devli Kolam × Dhanhar Black. For grain yield/ plant and most of the associated traits studied, medium to high per cent of genetic advance and narrow-sense heritability were observed across all four crosses. The predominance of additive gene effects likely contributed to these high values, suggesting that selection strategies could be effectively employed to enhance these favorable traits.