Genetic Studies of Two Crosses ofBrassica CampestrisL.

Abstract

SUMMARYHeritability of four quantitative characters in two crosses of Brassica campestris L. was found to be high. Dominance was detected only for plant height at heading time in both the crosses, and for sowing-to-heading period in Toria-TP × Toria-7. Transgressive segregation was expected in the segregating progenies for all the characters. Epistasis was complementary in all characters except in plant height at ripening time, where it was of the duplicate type. Additive × dominance type of epistasis was most significant and was present in most of the characters. Genes for most of the characters were linked with a major gene for seed colour (Rr). Yield was genetically correlated with the four quantitative characters studied.

Interrelationships Among Yield Components and Plant Growth Characters, and Their Contribution to Yield in Two Species of Mustard

“…The percentage of oil in the seeds was positively correlated with seed (Rai 1963), and in B. campestris ' Toria' (Joarder and Eunus 1969;Zuberi and Ahmed 1973). Grani and Stefansson(1977) reported additive gene action, no dominance, and no epistasis for percent protein, percent oil, and sum of protein and oil as a percentage of the seed in summer rape (B. napus L.).…”