Heterosis analysis of yield and its components for parents and F1’s in Brassica juncea L.

Abstract

The present study entitled “Heterosis analysis of yield and its components for parents and F1’S in Brassica juncea L.” was carried out at the Research and Instructional Farm of S.G. College of Agriculture and Research Station, Kumhrawand, Jagdalpur (C.G.), Indira Gandhi Krishi Vishwavidyalaya, Raipur (Chhattisgarh) during Rabi 2016-17. Experimental materials comprised 10 F1 from a half diallel cross of five parents was grown in Randomized Complete Block Design with three replications with the objectives to estimate the heterosis is estimated for average, heterobeltiosis and standard genotype results. Days taken to 50% flowering, days taken to 50% maturity, plant height, number of primary branches, number of secondary branches, number of siliquae per plant, number of seeds per siliquae, 1000 seed weight and seed yield per plant exhibited significant (p ≥ 0.01-0.05) differences among all the entries. The heterobeltiosis (Better parent) Out of ten hybrids four hybrids showed positive significant heterobeltiosis RH-119 x DRMRIJ-31 (48.21) followed by RH-406 x NRCHB-10 (44.94), RH-749 x RH-406 (27.53) and RH-749 x RH-119, The heterosis over check (Best parent) for this traits ranged from -32.89 (RH-749 x DRMRIJ-31) to 46.00 (RH-119 x DRMRIJ-31). Out of ten hybrids three hybrids showed exhibited positive standard heterosis RH-119 x DRMRIJ-31 (46.00) followed by RH-406 x NRCHB-10 (44.94) and RH-749 x RH-406 (27.53). Improved seed yield is a primary objective in a crop breeding program and therefore, positive heterosis for seed yield is of prime importance to develop high yielding genotypes.