Jared Decker, PhD University of Missouri One point must be clear from the very beginning: EPDs work. When we select parents based on EPDs the genetic merit
for that trait increases in our herd. When we select the parents using EPDs the
performance of the next generation improves. EPDs
Defined EPD stands for Expected Progeny Difference. These three words are loaded
with meaning, thus the need to define them here. The most loaded word is
Expected. Here we use Expected the way a statistician would use the word.
Expected means we are making a prediction of a future value. But, in this
context, Expected also means we are describing the average of a group. What is
the group for which we are predicting the average? We are predicting the
average performance of the Progeny or calves out of an animal. An animal’s own
performance and its EPD can be quite different, because that is not the purpose
of an EPD. The EPD is predicting the average performance of that animal’s calf
crop. Finally, EPDs are u…
Commercial beef producers will get more traits and selection index tools in the upgraded Igenity® Beef profile.
The Igenity Beef Profile will offer 16 traits for $29, replacing Neogen’s 13-trait Igenity Gold ($40) and 6-trait Igenity Silver ($25) tests. The upgrade includes new predictions for weaning weight, yearling weight and hot carcass weight for a total of 16 traits scored on a 1–10 scale, plus two new selection indexes.
“Our customers will be getting a powerful new profile at even greater value,” said Dr. Stewart Bauck, vice president of agrigenomics at Neogen. “The Igenity profile was designed and validated for crossbred or straightbred cattle with backgrounds of Angus, Red Angus, Simmental, Hereford, Limousin and Gelbvieh.
“Most DNA profiles are breed-specific,” Bauck continued. “The novel design of Igenity Beef allows for the accurate prediction of performance in both crossbred or straightbred cattle among the target breeds. This lets cow-calf producers use a DNA profile to …
Jared E. Decker Associate Professor, Division of Animal Sciences, University of Missouri
Reprinted with permission from The Cattlemen and Santa Gertrudis Breeders International.
Can we be frank
for a minute? It is quite simple: EPDs work. When we use EPDs to make selection
decisions (which bulls to buy, which females to keep and cull), the performance
of our herd improves. Let’s discuss why EPDs work, how they can be used, and
pitfalls to avoid. Defining EPDEPD stands for
Expected Progeny Difference. “Expected” in this context is a loaded word. We
use it here the way a statistician would use it. Expected means we are
describing a prediction of the future. Expected also means we are discussing an
average, not a single observation. What is the average that we are predicting
with EPDs? We are predicting the average progeny, or the average of an animal’s
calf crop. Finally, when we are discussing EPDs we are discussing differences.
Either the difference between two animals or the difference b…