Gene effects for yield, yield attributes and quality parameters in Indian mustard [Brassica juncea (l.) czern and coss] by generation mean analysis

The components of generation means were partitioned for seed yield, yield attributes and quality parameters in Indian mustard (Brassica Juncea (L.) Czern and Coss) with three sets of crosses viz., Cross I: GM 1 x NUDH YJ 3, Cross II: JM 2 x EC 287711 and Cross III: BI0772 R x NUDH YJ 3 using six basic generations (P₁, P₂, F₁, F₂, BC₁ and BC₂). The experimental material was grown in compact family block design (CFBD) with three replications during rabi 2010–11. Significant scaling tests for all the characters in all the crosses revealed that inter-allelic interactions were involved in the inheritance of all the characters except for length of main branch and lenoleic acid in cross III (BI0772 R x NUDH YJ 3), where only allelic interaction was involved for the inheritance of this trait. Estimates of gene effects revealed significant role of all the gene actions i. e. additive, dominance and epistasis in governing almost all the characters studied except 1000-seed weight, number of branches per plant and protein content.