Which trait in sheep is characterized by moderate heritability?

• A. Feed efficiency
• B. Backfat thickness
• C. Staple length
• D. Loin eye area

Answer: (A)

The trait characterized by moderate heritability in sheep is feed efficiency. Heritability is a measure of how much of the variation in a trait can be attributed to genetics as opposed to environmental factors. Feed efficiency, which refers to how well sheep convert feed into body mass, does show a moderate relationship with genetic factors. This means that while genetics play a significant role in determining how efficiently sheep can utilize their feed, environmental conditions and management practices also influence this trait considerably.

In contrast, traits like backfat thickness, staple length, and loin eye area often exhibit different levels of heritability. Backfat thickness typically has a higher heritability, implying it is more strongly influenced by genetic factors. Staple length has low heritability, indicating that environmental factors play a larger role in its expression. Loin eye area also generally aligns more closely with higher heritability due to the significant genetic control over muscle growth. Understanding the heritability of these traits helps farmers and breeders make informed decisions when selecting animals for breeding purposes.