Q.83
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Individual selection is a method for faster genetic improvement of highly heritable economic traits
Reason (R) : Individual selection can not be used for improvement of sex limited traits
In light of the above statements, choose the most appropriate answer from the options given below
- Assertion (A) is Correct: Individual (Mass) Selection based solely on an animal's own phenotype is the simplest and most effective selection method for traits with high heritability ($h^2 \gt 0.30$), yielding rapid genetic gain per generation ($\Delta G = i h^2 \sigma_P$).
- Reason (R) is Correct: Individual selection cannot be used to select males for sex-limited traits that are expressed only in females (e.g., milk yield, egg production, litter size), necessitating pedigree or progeny testing.
- Relationship: While both statements are correct, (R) describes a specific limitation for sex-limited traits rather than explaining why individual selection produces faster genetic progress for highly heritable general traits.
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