Genetics of yield and its components in rice bean under mid altitude areas of Mon district Nagaland India

Abstract

Genetic variability, correlation and path analysis for nine quantitative traits in nineteen genotypes of rice bean were studied at the Instructional Farm, Krishi Vigyan Kendra, Mon (Aboi), Nagaland under rainfed conditions during kharif 2015. Maximum phenotypic (PCV) and genotypic (GCV) coefficients of variation were observed in case of number of pods per plant (8.62 and 8.41%) and days to 50% flowering (8.08 and 7.88%). Both heritability and genetic advance are high for number of pods per plant (95.33% and 17.12) and days to 50% flowering (95.68% and 15.32). Days to 50% flowering with grain yield per plant (rg= 0.63 and rp= 0.80) and number of pods per plant with grain yield (rg= 0.89 and rp= 0.86) indicates highly significant and positive correlation at genotypic and phenotypic level. Path analysis revealed that only days to 50% flowering had showed high direct effect and highly significant positive correlation with grain yield per plant (0.848 and rg= 0.781), indicating the importance of selection based on this character to increase grain yield per plant.