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maybe future a.i. bull
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<blockquote data-quote="bigag03" data-source="post: 894017" data-attributes="member: 9247"><p>The difference is that the Poultry and Swine industries were able to utilize intense linebreeding of the purebred lines before they formed a cross of two specialized sire lines (terminal breeds) to form a crossbred sire and crossed two specialized dam lines (maternal) to form a crossbred dam. Then the cross of these two specialized crosses can be uniform while maximizing direct and maternal heterosis. Because of generation interval and environmental influences that cannot be controlled in the beef industry, this uniformity in crossbreds cannot be captured. The most efficient commercial breeding program will always be to use an F1 dam from maternal lines (ex. Tigerstripe) and a purebred terminal sire of a third breed. This method maximizes direct and maternal heterosis while controlling variation and breed complementarity.</p></blockquote><p></p>
[QUOTE="bigag03, post: 894017, member: 9247"] The difference is that the Poultry and Swine industries were able to utilize intense linebreeding of the purebred lines before they formed a cross of two specialized sire lines (terminal breeds) to form a crossbred sire and crossed two specialized dam lines (maternal) to form a crossbred dam. Then the cross of these two specialized crosses can be uniform while maximizing direct and maternal heterosis. Because of generation interval and environmental influences that cannot be controlled in the beef industry, this uniformity in crossbreds cannot be captured. The most efficient commercial breeding program will always be to use an F1 dam from maternal lines (ex. Tigerstripe) and a purebred terminal sire of a third breed. This method maximizes direct and maternal heterosis while controlling variation and breed complementarity. [/QUOTE]
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