What is the term for the change in average breeding value of a population over time?

• A. Genetic Trend
• B. Generation Interval
• C. Selection Criterion
• D. Large Scale Genetic Evaluation

Answer: (A)

The term for the change in average breeding value of a population over time is referred to as a genetic trend. This concept is fundamental in the field of breeding and genetics because it indicates how the genetic quality of a population is shifting due to selective breeding practices or natural selection over successive generations.

Understanding genetic trends is crucial for breeders as it allows them to assess the efficacy of their breeding strategies and to make informed decisions to enhance specific traits within a population. By tracking genetic trends, breeders can identify patterns that inform the future direction of their breeding programs, ultimately leading to improved genetic gains.

In contrast, the other terms have distinct meanings. The generation interval refers to the average time between successive generations, which is key in determining the rate of genetic change but does not directly measure change in breeding values. A selection criterion pertains to the standards used to evaluate and select individuals for breeding based on desired traits, while large scale genetic evaluation involves broader assessments of breeding values across populations but does not specifically address the ongoing change in average values over time.