Diallel Analysis to Investigate the Nature of Gene Action in Okra [Abelmoschus esculentus (L.) Moench]

Abstract

A diallel scheme excluding reciprocal was adopted in okra to generate 45 F1 hybrids in Rabi season 2020 and the hybrids along with 10 parents were evaluated using a randomized complete block design (RCBD) in Kharif 2020. The additive components (D) of genetic variance was found to be highly significant for days to first flowering, days to 50% flowering, node at first flower appear, number of branches per plant and plant height (cm) at harvesting. The estimates of dominant components Ĥ1, Ĥ2 and ĥ2 were evaluated. Ĥ1 and Ĥ2 were highly significant for all the characters. Dominance components (ĥ2) were found in few characters viz. days to first flowering, number of fruit per plant, fruit weight, fruit length, fruit diameter, 100 seed weight, fruit yield per plant and fruit yield quintal per hectare suggested the role of dominance components for these traits. Near about fifty percent traits was showed significant value in environment component. The average degree of dominance was more than one for all the characters showed over dominance.