Darrh Bullock (University of Kentucky): EPD stands for expected progeny difference. Expected progeny difference is a measure of genetic merit that we have in beef cattle. Basically, how you use an EPD, is the difference between two bulls' EPDs for a particular trait is the expected difference that we would see in the average of their calf crop. For example, if we had two bulls that differed by 10 pounds on their EPD for weaning weight direct, we would expect the bull with the higher values calves to weigh, on average, about 10 pounds more than the calves from the other bull in a similar environment and bred to similar cows.
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