What is repeatability?

What is repeatability?

• A. The heritability of the trait across generations.
• B. The percentage of the phenotype that is repeatable in the next production cycle.
• C. The extent to which a trait is influenced by diet.
• D. The proportion of genotype transmitted to offspring.

Answer: (B)

Repeatability measures how repeatable a trait is within the same individual across repeated measurements. It reflects the portion of the observed phenotype that stays the same from one record to another, meaning it includes both the additive genetic effects and the permanent environmental effects that consistently influence that animal. In practical terms, if repeatability is high, a single measurement gives a good prediction of future measurements because most of the variation you see is due to factors that don’t change with time rather than temporary conditions. This concept helps determine how many records are needed to get a reliable estimate of an animal’s performance. It’s not about how much of the phenotype is passed to offspring (that’s related to heritability), nor is it about diet influence, nor about the exact genotype transmitted to progeny.

Repeatability measures how repeatable a trait is within the same individual across repeated measurements. It reflects the portion of the observed phenotype that stays the same from one record to another, meaning it includes both the additive genetic effects and the permanent environmental effects that consistently influence that animal. In practical terms, if repeatability is high, a single measurement gives a good prediction of future measurements because most of the variation you see is due to factors that don’t change with time rather than temporary conditions. This concept helps determine how many records are needed to get a reliable estimate of an animal’s performance. It’s not about how much of the phenotype is passed to offspring (that’s related to heritability), nor is it about diet influence, nor about the exact genotype transmitted to progeny.