Vol. 11, Issue 5 (2022)

Author(s):
Vivek Singh, Sharad Pandey and Gideon Synrem

Abstract:
Combining ability of fifteen quantitative traits was studied in 7 lines, 3 testers and 21 F1 ’s in Line x Tester mating design to know the inheritance pattern of yield attributes of Brassica campestris L. var. toria. The analysis of variance revealed the treatments were highly significant for all the traits under study except for the character siliqua length. Amongst the parents, PT-303 was a good general combiner for seed yield and other contributing characters. The hybrids PT-303 x Uttara, Tapeswari x Uttara and PHT-1 x Uttara showed high better parent heterosis and high per se performance for seed yield. The hybrid Bhawani x G-14 showed high positive significant sca effect for seed yield, biological yield, siliqua length and length of main raceme. The hybrid SDS-22 x Uttara also showed high positive significant sca effect for seed yield, siliqua length and length of main raceme. Based on the estimates of components of variances for all the traits studied, it reveal that sca variance was higher than gca variance, indicating the preponderance of non-additive gene action which includes dominance and epistasis where hetrosis breeding would be helpful in utilizing maximum proportion of fixable genetic variation for future crop improvement.