What is an EPD?

• A. Environmental protein deficiency
• B. Expected progeny difference
• C. Enhanced performance designation
• D. Estimated production date

Answer: (B)

EPD stands for Expected Progeny Difference, a genetic prediction used in livestock breeding to estimate how future offspring will perform for a given trait compared with the population average. It’s derived from performance data of the animal and its relatives and is used to compare potential parents when making selection decisions. The value is about how progeny are likely to differ, on average, from the herd or breed average for that trait, and it comes with an accuracy that reflects confidence in the prediction. For example, an EPD for weaning weight gives an idea of how much heavier (or lighter) calves from that animal’s progeny are expected to be at weaning, relative to average. EPDs are about genetic potential, not about environmental deficiencies, management designations, or production dates.