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Cattle Boards
Artificial Insemination (AI) for Cattle
In-breeding Risk same grandfather & great great grandfather
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<blockquote data-quote="Nick Wagner" data-source="post: 1648556" data-attributes="member: 25329"><p>Lucky, I'll give you that mutations can and do occur, but what sticks out to me in your statement is that you bought that registered Angus bull. I doubt he was the original carrier of that defect, I would guess he inherited it from a parent. A short story, around 1980 I saw a calf out of a registered angus cow that looked like a fawn, I remember thinking it must be proof a buck can serve a cow. Then some thirty five years later, the AAA announces they have discovered a new recessive gene, called fawn calf syndrome, and they have developed a test for it. I'm not sure how to describe my feelings, disappointed or disgusted would come close. I'm sure the defective calf I saw was not the first one, and it took the Association that long to discover it?</p><p></p><p>I read a book once titled "The Battle of Bull Runts". It described how a bull born in 1899, through a series of events similar to what you describe, became the originator of the dwarf gene that afflicted the Hereford breed some forty and fifty years later. By that point it was impossible to determine whether the defect originated with him or had been inherited. Everyone who calls themselves a cattle breeder should read that book. The AAA has even come up with a process to declare a bull recessive trait free. All you have to do is breed him to a number of his own daughters, thirty two I believe, and if all the resulting calves are normal he can be recognized as such.</p><p></p><p>The chances of a new recessive syndrome occurring on my farm is approximately the same as winning the lottery, the chances of buying it, of importing a problem, is much higher. What I am doing is not for everyone, but I am happy with the results so far.</p></blockquote><p></p>
[QUOTE="Nick Wagner, post: 1648556, member: 25329"] Lucky, I’ll give you that mutations can and do occur, but what sticks out to me in your statement is that you bought that registered Angus bull. I doubt he was the original carrier of that defect, I would guess he inherited it from a parent. A short story, around 1980 I saw a calf out of a registered angus cow that looked like a fawn, I remember thinking it must be proof a buck can serve a cow. Then some thirty five years later, the AAA announces they have discovered a new recessive gene, called fawn calf syndrome, and they have developed a test for it. I’m not sure how to describe my feelings, disappointed or disgusted would come close. I’m sure the defective calf I saw was not the first one, and it took the Association that long to discover it? I read a book once titled “The Battle of Bull Runts”. It described how a bull born in 1899, through a series of events similar to what you describe, became the originator of the dwarf gene that afflicted the Hereford breed some forty and fifty years later. By that point it was impossible to determine whether the defect originated with him or had been inherited. Everyone who calls themselves a cattle breeder should read that book. The AAA has even come up with a process to declare a bull recessive trait free. All you have to do is breed him to a number of his own daughters, thirty two I believe, and if all the resulting calves are normal he can be recognized as such. The chances of a new recessive syndrome occurring on my farm is approximately the same as winning the lottery, the chances of buying it, of importing a problem, is much higher. What I am doing is not for everyone, but I am happy with the results so far. [/QUOTE]
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In-breeding Risk same grandfather & great great grandfather
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