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New bull???
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<blockquote data-quote="Nick Wagner" data-source="post: 1761438" data-attributes="member: 25329"><p>DNA testing is not perfect, it can only find known faults. I saw a fawn calf back around 1980, I stood there thinking I'd never heard of a buck serving a cow but here it is, calf was either born dead or died shortly after birth. Then nearly forty years later, the AAA announces they have discovered fawn calf syndrome, caused by a recessive gene, and they have a test for it. In the interim, a DNA test would have come back clean. There is a fear of inbreeding, I believe it is a result of the dwarfism the industry went through 70 years ago and the mistaken belief inbreeding causes dwarves.</p><p></p><p>If you think about it, why are whitetail deer all uniformly alike? For that matter, it seems all herd species are uniform in the wild. It wasn't outcrossing caused that.</p><p></p><p>Today, the AAA will certify a bull clean of defects if he is bred back to a number of his own daughters and all resulting calves are normal. I think the magic number is 32 or 33, might be 36. </p><p></p><p>You have a valid point on CE, or for that matter, any single trait selection. I do have a story though. Grandpa one time bred a few cows to a bull named Wild Turkey, I found out the next spring when he had some whopper calves. I could have throttled him, bull was a plus 7 on birth weight, what were you thinking? Good thing he had grandsons around to help.</p></blockquote><p></p>
[QUOTE="Nick Wagner, post: 1761438, member: 25329"] DNA testing is not perfect, it can only find known faults. I saw a fawn calf back around 1980, I stood there thinking I’d never heard of a buck serving a cow but here it is, calf was either born dead or died shortly after birth. Then nearly forty years later, the AAA announces they have discovered fawn calf syndrome, caused by a recessive gene, and they have a test for it. In the interim, a DNA test would have come back clean. There is a fear of inbreeding, I believe it is a result of the dwarfism the industry went through 70 years ago and the mistaken belief inbreeding causes dwarves. If you think about it, why are whitetail deer all uniformly alike? For that matter, it seems all herd species are uniform in the wild. It wasn’t outcrossing caused that. Today, the AAA will certify a bull clean of defects if he is bred back to a number of his own daughters and all resulting calves are normal. I think the magic number is 32 or 33, might be 36. You have a valid point on CE, or for that matter, any single trait selection. I do have a story though. Grandpa one time bred a few cows to a bull named Wild Turkey, I found out the next spring when he had some whopper calves. I could have throttled him, bull was a plus 7 on birth weight, what were you thinking? Good thing he had grandsons around to help. [/QUOTE]
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