AGB-0041
QUESTION
General combining ability occurs due to?
OPTIONS
(A) Additive gene action
(B) Dominance
(C) Over dominance
(D) Epistasis
ANSWER
(A) Additive gene action
EXPLANATION
General combining ability primarily reflects additive genetic effects and therefore indicates the average performance of a line in crosses with other lines. Dominance, overdominance and epistasis are non-additive interactions that contribute more directly to specific combining ability rather than general combining ability.
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