What does an Expected Progeny Difference (EPD) estimate?

• A. Predict the environmental effects on performance
• B. Indicate disease susceptibility
• C. Provide estimates of the genetic value of an animal as a parent
• D. Measure the animal's current weight

Answer: (C)

EPD estimates the genetic value an animal can pass to its offspring, predicting how much its progeny are expected to differ in a given trait due to additive genes, compared to the population average. This estimate comes from analyzing performance data, pedigrees, and progeny records, and it helps breeders select animals likely to transmit favorable traits to their children. It focuses on future offspring performance and the animal’s genetic merit, not its current weight or environmental effects. It isn’t a measure of disease susceptibility itself, though health traits can be included in EPD calculations. Accuracy varies with the amount and quality of data, influencing how reliable the estimate is.