Assessment of Genetic Variability, Heritability and Genetic Advance for Yield in Advanced Breeding Line (Oryza sativa L.) of Low Land Rice in Meghalaya

Ashish Rai, Mayank Rai, Bidisha Borpatragohain, Shi vendra, ku mar
2020 International Journal of Current Microbiology and Applied Sciences  
Journal homepage: The genetic parameters were studied to generate information on genetic variability, heritability and genetic advance among 22 advanced breeding lines including two checks at the experimental Farm of College of post graduate studies, CAU (Imphal), Umiam, Meghalaya during Kharif 2017. Analysis of variance indicated the existence of significant differences among the genotypes for most of the characters. High Phenotypic Coefficient of variation (PCV) and
more » ... tion (PCV) and Genotypic Coefficient of Variation (GCV) values were recorded for number of grain per panicle and spikelet per plant which suggests the possibility of improving this trait through selection. The low magnitude of difference between phenotypic and genotypic coefficients of variations were recorded for characters such as days to 50 % flowering, leaf length and leaf width indicating limited influence of environment in the expression of this trait. Thus, selection based on phenotypic expression of the trait would be effective for genetic improvement. High heritability in broad sense values indicate that the traits under study are less influenced by environment in their expression. Therefore, the quantitative traits are highly heritable. However, highest heritability was recorded for leaf length and leaf width. Moderate heritability estimates were observed for number of panicles per plant, spikelets per panicle, grains per panicle, and spikelet fertility.
doi:10.20546/ijcmas.2020.903.085 fatcat:ufrd5cat7bf2heppdbnochwamu