What is the heritability of backfat thickness in beef cattle?

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

Answer: (B)

Heritability refers to the proportion of observed variation in a trait that can be attributed to genetic factors in a population. In the case of backfat thickness in beef cattle, a moderate heritability indicates that while both genetic and environmental factors influence this trait, genetics play a significant role.

When heritability is categorized as moderate, it means that selective breeding can effectively influence the trait. Breeders can make genetic progress by selecting animals with desirable backfat thickness, as it reflects an important aspect of beef quality and yield. This degree of heritability allows breeders to anticipate improvements in backfat thickness in future generations when selecting for this trait.

Understanding heritability is crucial for effective breeding programs, as it helps breeders determine how much of the trait can be improved through selection and to what extent environmental factors may impact the outcome. The moderate heritability level for backfat thickness suggests a balance, where both genetics and the environment contribute to the phenotypic expression of this trait.