Studies on Heterosis and Inbreeding Depression for Yield and It’s Contributing Traits in Greengram [Vigna radiata (L.) Wilczek]

Abstract

The current investigation was carried out at Student Instruction Farm of Chandra Shekhar Azad University of Agriculture and Technology Kanpur, U.P. on nineteen diverse genotypes of greengram consisting of 16 lines and 3 testers. The genotypes were crossed in line x tester mating design during kharif 2021 to obtain the 48 F1 hybrids to test the standard heterosis against the commercial check KM2241. For getting the F2 seeds, half seeds of each F1 were sown in zaid 2022. The final trial comprising 48 F1s, 48 F2s and the check KM2241 were sown in randomized block design during kharif 2022. The best crosses that showed highly significant standard heterosis in positive direction for seed yield per plant as compared to the check were KM2401 X PDM139 followed by IPM302 X PDM139, KM2404 X PDM139, KM2426 X K851 and IP-7 X PDM139. The maximum negative and highly significant inbreeding depression against the check for seed yield per plant was estimated for KM2414 X PDM139 followed by KM2290 X KM2241, KM2290 X PDM139, KM2408 X PDM139 and KM2408 X K851. The crosses that showed most significant positive heterosis and most significant negative inbreeding depression for the seed yield per plant can be commercially exploited as hybrids for the improvement of greengram.