Genetic Interaction and Selection Strategy for different Traits in Brassica Campestris

Author(s) : Salsabeel Rauf, Muhammad Ahsan Iqbal, Hafeez Ahmad Sadaqat , Nisar Ahmed

Digital object identifier:

10.52587/JAF040301

Abstract:

Generation mean analysis through 6 parameter model for three parents along with four generations viz F1, F2, BC1 and BC2 of two crosses of Brassica campestris was studied and evaluation was done in Randomized Complete Block Design (RCBD) with three replications in 2019. Additive variance was noted for 1000 seed weight in cross Span × Toria and for days to 50% flowering in cross TR8 × Toria. Hence selection at early generation may be helpful for the improvement of these traits. Negative dominance effect was present for glucosinolate in cross TR8×Toria which might be supportive for the reduction of this trait. Genetic interactions were found fixable for plant height, siliqua length, days to 50% flowering, days to maturity, number of seeds per siliqua, yield, oleic acid and erucic acid in cross Span × Toria and for plant height, siliqua length, days to 50% flowering, days to maturity, oil contents, oleic acid, linoleic acid, erucic acid and glucosinolate in cross TR8 ×Toria. The traits showed fixable interaction mass selection and progeny selection would be effective while for others exploitation of heterosis breeding may be effective and selection would be delayed to attain homozygosity.