Brangus Journal: Understanding Genomic Prediction

Head on over to the Brangus Journal website to see some of my latest writing on genomic prediction.

The Dance Steps of Genomics Part I: Understanding Genomic Prediction

Personally, it is probably my favorite of the articles I have written, so I would encourage you to make the time to read it.

What do you think of the article? As always, your feedback is welcome.

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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…
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What letter is most different?

b? c? d? q?

Look again:


What about the t?

We see things through the lens of our expectations.

What if the t is a threat? What if you didn't even see it? What if the t is an opportunity? It is a lot easier to see threats and opportunities at your neighbor's operation.

Too often, we wait till we are out of time and money to make changes.
We hear the phrase, "If you always do what you have always done you will always get what you've always got." But, in the cattle business…
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