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<blockquote data-quote="Commercialfarmer" data-source="post: 870290" data-attributes="member: 14544"><p>Came across a registered angus bull a couple years ago that is listed as NHC-AMF-CAF.</p><p></p><p>His Sire was listed as AMF-CAF. </p><p></p><p>His Dam was listed as AMF-NHF and still is. </p><p></p><p>I doubt this occurs often by any means, but it would not be cool to have a negative x negative mating yield a carrier calf. I know that either a test somewhere along the lines yielded an erroneous result, sample was mixed up, etc, the listed linage was incorrect, or the sire line is a carrier and has not been identified. I doubt that as he is extremely popular (I won't divulge this as I don't know where the problem lies, maybe even the carrier status? and I don't want to be wrongfully slander a breeder or line. Using this as an example only). </p><p></p><p>With this particular calf, he had the look the sire stamped on his calves- so I have to think lab error was at play. This would be the only concern I would have with mating any immediate descendants- was the test accurate for this particular one. </p><p></p><p>However, it would be crazy for seed stock producers to totally disregard a line of cattle due to a genetic defect. Tests were designed to identify carriers- and are generally very acurrate. This information is valuable and can make using the various lines of cattle with known defects possible. The negative can be separated from the positive and carrier free cattle can be sold for commercial production, or for other seed stock use. </p><p></p><p>More importantly, as we go along and identify more and more genetic defects you will realize that no animal or human will have defect free genes. We all have anomalies. Some bigger than others. Some life threatening at any earlier age, others later. There is no such thing as a completely clean bull. It is said that on average we all have at least 3 anomalies. Most are just functional with life, at least for a period of time. </p><p></p><p>It would be a mistake to chunk any productive line out the window completely, especially when the defect can actually be identified.</p></blockquote><p></p>
[QUOTE="Commercialfarmer, post: 870290, member: 14544"] Came across a registered angus bull a couple years ago that is listed as NHC-AMF-CAF. His Sire was listed as AMF-CAF. His Dam was listed as AMF-NHF and still is. I doubt this occurs often by any means, but it would not be cool to have a negative x negative mating yield a carrier calf. I know that either a test somewhere along the lines yielded an erroneous result, sample was mixed up, etc, the listed linage was incorrect, or the sire line is a carrier and has not been identified. I doubt that as he is extremely popular (I won't divulge this as I don't know where the problem lies, maybe even the carrier status? and I don't want to be wrongfully slander a breeder or line. Using this as an example only). With this particular calf, he had the look the sire stamped on his calves- so I have to think lab error was at play. This would be the only concern I would have with mating any immediate descendants- was the test accurate for this particular one. However, it would be crazy for seed stock producers to totally disregard a line of cattle due to a genetic defect. Tests were designed to identify carriers- and are generally very acurrate. This information is valuable and can make using the various lines of cattle with known defects possible. The negative can be separated from the positive and carrier free cattle can be sold for commercial production, or for other seed stock use. More importantly, as we go along and identify more and more genetic defects you will realize that no animal or human will have defect free genes. We all have anomalies. Some bigger than others. Some life threatening at any earlier age, others later. There is no such thing as a completely clean bull. It is said that on average we all have at least 3 anomalies. Most are just functional with life, at least for a period of time. It would be a mistake to chunk any productive line out the window completely, especially when the defect can actually be identified. [/QUOTE]
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