Practice question
Question
Following statements are made regarding heterosis breeding in plants. A. Heterosis is always lowest in a cross between two genetically diverse parents. B. Cytoplasmic Male Sterility (CMS) may be used in heterosis breeding to eliminate emasculation. C. The A-line (CMS) and B-line (used for maintenance of CMS) are isogenic lines, differing at only a specific locus. D. Heterosis can be retained in the F2 generation. Which one of the following options represents the combination of all correct statements?
Explanation
In following statements are made regarding heterosis breeding, B and C only represents established outcome. functional assays confirms option C (B and C only) as correct, while alternatives misstate substrate or regulatory direction, contradicting textbook data.
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