Combining ability and heterosis for yield and yield contributing traits in brassica rapa (L.) ssp. dichotoma (Roxb.) hanelt

Combining ability was studied for yield and yield contributing traits in 5 × 5 diallel cross in brassica rapa (l.) ssp. dichotoma (roxb.) hanelt. primary branches plant-1,pods main raceme-1,pod length,100-seed weight and seed yield plant-1 were significantly different. heritability and genetic advance estimates were moderate for primary branches plant-1,pods main raceme-1,100 seed weight whereas were high for seed yield plant-1. parental line g-909 for primary branches plant-1,pods main raceme-1 and seed yield plant-1,genotype g-902 for pod length and genotype g-403 for 100- seed weight were the best general combiners. based on combing ability and heterosis,the f1 hybrids g-909 × g-265 (for primary branches plant-1),g-265 × g- 403,g-1500 × g-909 (for pods main raceme-1),g-403 × g-909 (for pod length),g-265 × g-1500 (for 100-seed weight) and g-1500 × g-902,g-909 × g-902 (for seed yield plant-1) can be utilized in future breeding endeavors. non-additive genetic control,as predominant mechanism,for all the traits necessitates the use of schemes like bi-parental mating design,diallel selective mating followed by recurrent or reciprocal recurrent selection. © 2014,pakistan botanical society. all rights reserved.