PJB-2018-674
Genetic exploration for quality aspects in Brassica campestris
Dr. Hafiz Basheer Ahmad
Abstract
The aim of the study was to explore the genetics of quality traits in Brassica campestris. For hybridization, ten varieties/lines of B. campestris having local and foreign origin were sown in the field as crossing block and crossed in line× tester fashion. The parents and the crosses were evaluated following Randomized Complete Block Design (RCBD) with three replications. Highly significant differences were noted among all the genotypes for seed oil, seedcake protein, glucosinolate, oleic acid and erucic acid contents showing high genetic potential for improvement. Analysis for the general combining ability showed almost significant differences except for protein that showed maximum non-significant difference among the lines. Significant difference were also noted among testers except for protein and erucic acid. Specific combining ability showed both significant and non-significant differences in positive and negative directions. Analysis for the components of genetic variance has indicated that non-additive gene action played a significant role for the inheritance of the traits. This was further continued by GCA/SCA ratio values, which were less than 1. Non additive variance is involved in these traits so to achieve homozygous line is challenging and the selection between the families may be satisfying. On basis of oil, erucic acid, oleic acid and glucosinolate these combinations viz. UAF12×Torch, Toria×Candle, UAF11×Torch and Span × Candle, were selected for SCA effects relative heterosis, heterobeltiosis and GCA estimates. These combinations can be used as source of quality traits in further breeding program.
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