Sib Selection: Category

Correct Answer: Family Selection

From the notes: Sib selection is a type of family selection. In sib (sibling) selection, animals are selected or culled based on the mean performance of their sib group (family), not based on the individual's own performance.

Types of Selection Based on Information Used (from notes)

• 1. Individual selection: Own phenotype
• 2. Pedigree selection: Ancestors' performance
• 3. Progeny testing: Progeny performance
• 4. Family selection: Collateral relatives' (sib) performance ✔

Uses of Sib Selection

• Carcass/slaughter traits — sibling is slaughtered for measurement; the candidate animal is selected based on its sib's carcass data
• Sex-limited traits — brothers used to evaluate sisters' potential
• Listed as 'most efficient aid to selection' and 'best aid for carcass traits in sheep' (from notes, Q39 match)