What is the heritability of mature weight in sheep?

What is the heritability of mature weight in sheep?

• A. High
• B. Moderate
• C. Low
• D. Very high

Answer: (B)

The heritability of a trait refers to the proportion of observed variation in a trait among individuals in a population that can be attributed to genetic differences. In livestock, traits with moderate heritability indicate that both genetics and environment play significant roles in expressing that trait.

For mature weight in sheep, studies have consistently shown that it has a moderate heritability. This means that while breeding can influence mature weight through selective breeding practices, environmental factors such as nutrition, management, and health also significantly contribute to the final weight attained by the sheep.

Choosing this option highlights an understanding of the interplay between genetics and environment in animal breeding, which is crucial for making informed breeding decisions aimed at improving traits like mature weight. High heritability traits would suggest a stronger genetic influence and less environmental impact, while low heritability traits indicate that environmental factors dominate, neither of which accurately describes mature weight in sheep.