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Novermber 21, 2020
hose involved in working with IGS genetic evaluation have been hearing about Work Order 1 (WO1) for quite a while. Those with cattle in the evaluation are likely to have never heard of it, but it is important to the EPD on your animals. Let’s put some context around what WO1 is, and more importantly why changing the EPD model over time is important. First, EPD are Expected Progeny Differences and they are a PREDICTION of differences in additive genetic variance between animals for a trait. Because they are a prediction, as we add more information we can improve the accuracy of the prediction. Think of a weather forecast. It is a prediction. If we have our blinds drawn and don’t look outside, or we are projecting far out into the future, it is less exact than predicting the weather this
Gelbvieh guide • Fall 2020 • Page 17
