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Cattle Boards
Breeding / Calving Issues
How many Test Crosses are needed
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<blockquote data-quote="Chocolate Cow" data-source="post: 1454461" data-attributes="member: 25265"><p><a href="http://onpasture.com/2014/10/20/breeding-matters-iii-inbreeding-vs-line-breeding/" target="_blank">http://onpasture.com/2014/10/20/breedin ... -breeding/</a></p><p>Before the advent of genetic testing for recessive traits the only way to statistically ensure genetic "purity" of a bull/ram/buck etc. was to breed that bull to 35 of his own daughters concurrently. If no genetic defects show up in any of the offspring, the bull is 99.7% likely to be genetic defect free.</p></blockquote><p></p>
[QUOTE="Chocolate Cow, post: 1454461, member: 25265"] [url=http://onpasture.com/2014/10/20/breeding-matters-iii-inbreeding-vs-line-breeding/]http://onpasture.com/2014/10/20/breedin ... -breeding/[/url] Before the advent of genetic testing for recessive traits the only way to statistically ensure genetic “purity” of a bull/ram/buck etc. was to breed that bull to 35 of his own daughters concurrently. If no genetic defects show up in any of the offspring, the bull is 99.7% likely to be genetic defect free. [/QUOTE]
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