Prepotency

1914 Hereford":2ayemkg6 said:
The more "line bred" the bull (or cow) is, (up to a sensible and reasonable degree) the higher percentage the resulting predictions will be.


This is the way we look at it, and for a lot of our customers, it has proven to work just this way.

Prepotency is the result of the homozygosity of one of the parents. There is a positive correlation between degree of closebreeding and homozygosity. An animal can be prepotent and not be closebred, but it is more rare among outcrossed animals than with closebred animals. The more homozygous an animal is the more prepotent it will be. Closebreeding is the most powerful tool available to increase homozygosity.
 
KNERSIE":z1zmpo9h said:
I know the theory behind why linebred bulls are supposed to be more prepotent, but why do you often get a non linebred bull that is extremely prepotent to the point where even a novice and go and pick his calves out of a larger group of calves sired by multiple sires?

I have a theory of my own as to why, but would like to hear others' opinions first.
Simply put from a simple mind. Continued selection for the same traits. Same way we got pole cattle.
 

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