Inapplicable Selection Basis for Male Milk Traits
The basis of selection cannot be used for selection of sire (male) for milk production-
- Performance of collateral relative
- Performance of Individual — Correct Answer
- Performance of Ancestors
- Performance of progeny
Explanation:
Correct Answer: Performance of Individual
A sire (male) cannot produce milk. Milk yield is a sex-limited trait expressed only in females. Therefore, it is impossible to evaluate a sire using his own individual performance (mass selection) for this trait.
Applicable vs. Inapplicable Bases of Selection for Sire Milk Traits
| Basis of Selection | Applicable for Sire? | Reason |
|---|---|---|
| Individual selection | No — Cannot be used | Male has no milk yield record |
| Pedigree selection | Yes | Dam's milk yield record available |
| Family selection | Yes | Sisters' milk yield records available |
| Progeny testing | Yes (best method) | Daughters' milk yield records — most accurate estimate of sire's transmitting ability |
Note
- Progeny testing is the most effective and best basis for selecting sires for sex-limited traits like milk production.
- Progeny testing is described as a 'two-way selection system' — selects good sires and culls poor ones based on daughters' performance.
📚 About this Topic — Animal Genetics & Breeding
This multiple choice question is from Animal Genetics & Breeding, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Genetics & Breeding to strengthen your preparation.
