Genetic variability, heritability and genetic advance for quantitative traits in f₂ population in okra [Abelmoschus esculentus (L.) Moench]

Abstract

The experiment was carried out during kharif-2016 at Regional Horticultural Research Station, Navsari Agricultural University, Navsari, Gujarat. Genetic variability, heritability and genetic advance as per cent of mean of 12 quantitative characters in 148 F2 plants from cross AOL-09-02 x AOL-10-22 and 160 F2 plants from cross AOL-09-02 x GAO-5 were studied. Significant differences among F2 population were observed for all the characters under study. The characters viz., number of branches/plant at final harvest, internodal length, fruit yield/plant, number of fruits/ plant and plant height at final harvest showed high phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) in F₂ populations of both crosses. High heritability was recorded for plant height at final harvest, fruit yield/plant, number of fruits/plant, days to first picking, days to first flowering and number of branches/plant at final harvest in F₂ populations of both crosses. While, fruit weight was observed in F₂ population of cross AOL-09-2 x AOL-10-22. High heritability coupled with high genetic advance as per cent of mean was recorded for plant height at final harvest, number of branches/plant at final harvest, number of fruits/plant and fruit yield/plant in F₂ populations of both crosses. While, in F2 population of AOL-09-2 x GAO-5, days to first flowering also showed high heritability coupled with high genetic advance as per cent of mean suggested the preponderance of additive genes for the inheritance of these characters.