Genetic analysis of components of variation for seed yield, oil yield and yield components revealed the importance of both additive and non additive type of gene action in the inheritance of all the characters studied. However, preponderance of additive components was observed for phenological traits, viz. days to flower and days to maturity, equal importance of both additive and dominance components for plant height, primary branches per plant, 500-seeds weight and seed oil content, whereas preponderance of dominance component was revealed for number of capsules per plant, seeds per capsule, seed yield per plant, biological yield per plant, harvest index and oil yield per plant. The biparental mating or diallel selective mating is suggested to exploit the genetic components for improvement of the characters studied.
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Tamil Nadu Agricultural University
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