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<blockquote data-quote="Ebenezer" data-source="post: 1329670" data-attributes="member: 24565"><p>Is this true in the sense of structural or many convenience faults? I understand growth, milk production, size and many things cannot be correctly expressed but are we to believe that blatant faults are the problem of environment? I think not. Incorrect structure, low udder quality, pinched heart girth, dipped back, poor foot angle, bad hooves, poor disposition and much more are not going to be disappearing if they are in the parents.</p><p></p><p>We can use faulty animals, sure, but not without consequences. You can cover faults by selecting the offspring that do not express the faults. Outcrossing and crossbreeding helps tremendously. But there is still a % loss and an introduction of faults into the genepool. This is the problem with some breeds that now have foot, leg and fertility issues: problems are introduced and folks either are going to lose money or sell all by "value" of parentage and connections. It does not make the problems go away and does not make the breed better.</p><p></p><p>So what if, (big if) an animal has poor phenotype and futuristic genetic testing of more than 50% of the pairs says that is should have correct structure, right amount of growth, right amount of milk, mild temperament, ... Is it an animal to keep and use as a building block? There are stories that defy the odds: Jim Lingle recommending that a friend buy a roach back bull from an old Wye sale, a famous breeder using a small and poor performing bull named Bob to create a famous line, and probably more. But they are known because they were _____? (Maybe the word is "exceptions"?)</p></blockquote><p></p>
[QUOTE="Ebenezer, post: 1329670, member: 24565"] Is this true in the sense of structural or many convenience faults? I understand growth, milk production, size and many things cannot be correctly expressed but are we to believe that blatant faults are the problem of environment? I think not. Incorrect structure, low udder quality, pinched heart girth, dipped back, poor foot angle, bad hooves, poor disposition and much more are not going to be disappearing if they are in the parents. We can use faulty animals, sure, but not without consequences. You can cover faults by selecting the offspring that do not express the faults. Outcrossing and crossbreeding helps tremendously. But there is still a % loss and an introduction of faults into the genepool. This is the problem with some breeds that now have foot, leg and fertility issues: problems are introduced and folks either are going to lose money or sell all by "value" of parentage and connections. It does not make the problems go away and does not make the breed better. So what if, (big if) an animal has poor phenotype and futuristic genetic testing of more than 50% of the pairs says that is should have correct structure, right amount of growth, right amount of milk, mild temperament, ... Is it an animal to keep and use as a building block? There are stories that defy the odds: Jim Lingle recommending that a friend buy a roach back bull from an old Wye sale, a famous breeder using a small and poor performing bull named Bob to create a famous line, and probably more. But they are known because they were _____? (Maybe the word is "exceptions"?) [/QUOTE]
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