Vol. 10, Issue 12 (2021)

Author(s):
B Lenka, GU Kulkarni, DR Mehta, RS Tomar, KD Mungra and JB Patel

Abstract:
The present study was conducted was carried out to elicit information on magnitude of heterosis, combining ability and stability for grain yield and thirteen component traits. The crossing programme was executed for development of 40 hybrids from four diverse male sterile lines and ten males using line x tester mating during summer 2020 and evaluated along with parents and standard check GHB 1129 in summer 2021 at Instructional Farm, Junagadh Agricultural University, Junagadh, Gujarat. Among all the characters studied under the present investigation grain yield per plant and dry fodder yield per plant were the two most important economic traits which have been discussed for their combining ability in this research paper. The pooled analysis of variance revealed that the genotypes were significantly deviating for both for grain yield per plant and dry fodder yield per plant. Two females ICMA 99222 and ICMA 98444 in all three environments as well as on pooled basis and among males 177-SB-19, 216-SB-19, 217-SB-19 and 222-SB-19 in E₁ and E₃ and 177-SB-19, 216-SB-19 and 217-SB-19 in E₂ and on pooled basis were reported to be good general combiners for grain yield per plant. Two females ICMA 96222 and ICMA 99222 in all three environments and among males 216-SB-19, 217-SB-19 and 222-SB-19 in E₁ and E₂, 216-SB-19 and 217-SB-19 in E₃ and 177-SB-19, 216-SB-19 and 217-SB-19 on pooled basis were reported as the good general combiners for dry fodder yield per plant. Eight crosses viz., ICMA 04999 x 177-SB-19 (13.39), ICMA 96222 x 219-SB-19, ICMA 96222 x 222-SB-19, ICMA 96222 x 228-SB-19, ICMA 99222 x 190-SB-19, ICMA 99222 x 256-SB-19, ICMA 98444 x 205-SB-19 and ICMA 98444 x 216-SB-19 showed significant positive sca effects for grain yield per plant whereas five crosses ICMA 04999 x 177-SB-19, 04999 x 222-SB-19, ICMA 96222 x 190-SB-19, ICMA 99222 x 205-SB-19 and ICMA 99222 x 206-SB-19 showed significant positive sca effects for dry fodder yield per plant. Three males 177-SB-19, 216-SB-19 and 217-SB-19 recorded good gca effect and the cross ICMA 04999 x 177-SB-19 was found with high magnitude of positive sca effect towards both the characters.