Vol. 12, Issue 6 (2023)

Author(s):
Limbani Harsiddhi and Mehta DR

Abstract:
The present investigation was conducted on heterosis for earliness related traits and fruit yield per plant in okra. Thirty-six F₁ hybrids were generated by half diallel (excluding reciprocals) mating design. These F₁ hybrids along with nine parents were evaluated in randomized block design with three replications during three seasons viz., Early kharif 2021 (E₁), Kharif 2021 (E₂) and Late kharif 2021 (E₃). Analysis of variance revealed that mean square due to genotypes has significant for all the five traits in all the environments except days to first flowering in E₂. The highest heterobeltiosis was observed in AOL-12-59 x VRO-6 in E₁, EC 169513 x GO-2 in E₂ and HRB 108-2 x NOL-17-9 in E₃ for days to first flowering; HRB-55 x GO-2 in E₁, AOL-12-59 x NOL-17-9 in E₂ and HRB 108-2 x GO-2 in E₃ for days to first picking; HRB 108-2 x JOL-11-1 in E₁, IC 90107 x EC 169513 in E₂ and E₃ for days to last picking; IC 90107 x VRO-6 in E₁, AOL-12-59 x GO-2 in E₂ and IC 90107 x EC 169513 in E₃ for number of pickings and HRB 108-2 x AOL-12-59 in E₁ and E₃, EC 169513 x GO-2 for fruit yield per plant. The highest standard heterosis was observed in AOL-12-59 x GO-2 in E₁, EC 169513 x GO-2 in E₂ and AOL-12-59 x VRO-6 in E₃ for days to first flowering; HRB-55 x GO-2 in E₁, EC 169513 x GO-2 in E₂ and HRB 108-2 x GO-2 in E₃ for days to first picking; IC 90107 x VRO-6 in E₁, IC 90107 x EC 169513 in E₂ and E₃ for days to last picking; HRB 108-2 x JOL-11-1 and EC 169513 x AOL-12-59 in E₁, IC 90107 x EC 169513 and IC 90107 x GO-2 in E₂ and IC 90107 x JOL-11-1 in E₃ for number of pickings and EC 169513 x GO-2 in E₁, HRB 108-2 x AOL-12-59 for fruit yield per plant. The top five heterotic cross combinations viz., HRB 108-2 x AOL-12-59, HRB 108-2 x HRB-55, EC 169513 x GO-2, IC 90107 x EC 169513 and HRB 108-2 x EC 169513 were identified as desirable heterosis for fruit yield and other earliness related traits in one or another environment in okra.