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<blockquote data-quote="Travlr" data-source="post: 1781115" data-attributes="member: 42463"><p>There have been some real problems in the last several years due to a lack of genetic diversity. Black angus had a hugely popular top bull, GAR Precision 1680, that was responsible for "curly calf syndrome" when those using his semen bred related females back to him, or to related bulls from him. There have been other less publicized anomalies as well.</p><p></p><p>Any time there is a pyramid built on popularity for breeding, people tend to take chances. We see great cows, related to the top bulls, being flushed and the top bulls producing 80% (?) of the commercial herd sires, and all the animals in every successive generation more related to each other.</p><p></p><p>Now every breed not black is being dinged at the point of sale, so they scramble to get black to survive against black cattle and the cycle repeats with those breeds as well... with the addition that their black genetics are sourced from the same places that are already having diversity issues.</p></blockquote><p></p>
[QUOTE="Travlr, post: 1781115, member: 42463"] There have been some real problems in the last several years due to a lack of genetic diversity. Black angus had a hugely popular top bull, GAR Precision 1680, that was responsible for "curly calf syndrome" when those using his semen bred related females back to him, or to related bulls from him. There have been other less publicized anomalies as well. Any time there is a pyramid built on popularity for breeding, people tend to take chances. We see great cows, related to the top bulls, being flushed and the top bulls producing 80% (?) of the commercial herd sires, and all the animals in every successive generation more related to each other. Now every breed not black is being dinged at the point of sale, so they scramble to get black to survive against black cattle and the cycle repeats with those breeds as well... with the addition that their black genetics are sourced from the same places that are already having diversity issues. [/QUOTE]
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