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line breeding gurus,
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<blockquote data-quote="Anonymous" data-source="post: 16020"><p>In rancher lingo it's called linebreeding if it works and inbreeding if it doesn't. The genetic principle is that the more closely two indiduals are related the greater the likelihood that any defective genes present in either animal will pass to the young. I know of one rancher who mated a full sister-brother pair and got a first rate herd bull out of them. Sire and dam were both genetically sound. Since it is difficult and expensive to test for that with every mating, it's generally best not to breed too close. The old time Texas rule is, If the sire and dam are at least 50% unrelated it'll probably work okay.</p><p></p><p> <a href="mailto:dskayner@earthlink.net">dskayner@earthlink.net</a></p></blockquote><p></p>
[QUOTE="Anonymous, post: 16020"] In rancher lingo it's called linebreeding if it works and inbreeding if it doesn't. The genetic principle is that the more closely two indiduals are related the greater the likelihood that any defective genes present in either animal will pass to the young. I know of one rancher who mated a full sister-brother pair and got a first rate herd bull out of them. Sire and dam were both genetically sound. Since it is difficult and expensive to test for that with every mating, it's generally best not to breed too close. The old time Texas rule is, If the sire and dam are at least 50% unrelated it'll probably work okay. [email=dskayner@earthlink.net]dskayner@earthlink.net[/email] [/QUOTE]
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