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Breeding / Calving Issues
Bull with translocation gene, semen testing questions
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<blockquote data-quote="Willow Springs" data-source="post: 1041146" data-attributes="member: 9002"><p>It isn't a test that is normally done unless the Breed Association in the importing country requires it. Some of the French breed Associations in Canada require any imported animals, semen or embryos to be tested or the donors tested and carriers are kept out of the herdbook. The French herdbooks have similar rules in terms of AI bulls even for domestic sales as do many Canadian Associations for French breeds. Outside of Canada/France there is no testing that I know of and very little knowledge of the issue.</p><p></p><p>In terms of fertility issues; we had a sire that turned out to be a carrier that really sired poor fertility in his daughters. At the time we didn't know anyhting about tranlocation, just thought his daughters didn't have great fertility. I am sure it was a combination of the translocation and other fertility factors. We also had a female that produced every year on a decent calving interval until she was 17. Didn't find out she was a carrier until she was tested prior to embryo production. The reading i have done only indicates a 5% death loss of embryos, so hardly something to get over excited about. Wouldn't want a herdsire passing it to all his daughetrs though.</p></blockquote><p></p>
[QUOTE="Willow Springs, post: 1041146, member: 9002"] It isn't a test that is normally done unless the Breed Association in the importing country requires it. Some of the French breed Associations in Canada require any imported animals, semen or embryos to be tested or the donors tested and carriers are kept out of the herdbook. The French herdbooks have similar rules in terms of AI bulls even for domestic sales as do many Canadian Associations for French breeds. Outside of Canada/France there is no testing that I know of and very little knowledge of the issue. In terms of fertility issues; we had a sire that turned out to be a carrier that really sired poor fertility in his daughters. At the time we didn't know anyhting about tranlocation, just thought his daughters didn't have great fertility. I am sure it was a combination of the translocation and other fertility factors. We also had a female that produced every year on a decent calving interval until she was 17. Didn't find out she was a carrier until she was tested prior to embryo production. The reading i have done only indicates a 5% death loss of embryos, so hardly something to get over excited about. Wouldn't want a herdsire passing it to all his daughetrs though. [/QUOTE]
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Bull with translocation gene, semen testing questions
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