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Composite bull
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<blockquote data-quote="Son of Butch" data-source="post: 1095004" data-attributes="member: 14585"><p>Answered my own question regarding hog research. 3 yr study 1977-1979.</p><p>Conclusion: Only significant difference using 4 breed cross F1 Boar on F1 females vs 3 way purebred boar on F1 females</p><p>F1 boars had 6% reproductive advantage over purebred boars.</p><p>While there was a significant difference by breed [duroc, landrace, spotted, and yorkshire] with duroc terminal sired pens </p><p>significantly out performing other purebred sires. </p><p>[perhaps in part bcs duroc cross sows also make poorer mothers than the other breeds]</p><p>There was NO Significant difference in average daily gain, feed efficiency or carcass merit using F1 boars vs purebred boars.</p><p></p><p>I have to assume it would hold true for cattle too.</p><p>Which breeds are used appears to be more important than 3 way cross vs 4 way cross.</p><p>I know using duroc x hampshire F1 boars on landrace x yorkshire F1 females is a very popular terminal cross.</p></blockquote><p></p>
[QUOTE="Son of Butch, post: 1095004, member: 14585"] Answered my own question regarding hog research. 3 yr study 1977-1979. Conclusion: Only significant difference using 4 breed cross F1 Boar on F1 females vs 3 way purebred boar on F1 females F1 boars had 6% reproductive advantage over purebred boars. While there was a significant difference by breed [duroc, landrace, spotted, and yorkshire] with duroc terminal sired pens significantly out performing other purebred sires. [perhaps in part bcs duroc cross sows also make poorer mothers than the other breeds] There was NO Significant difference in average daily gain, feed efficiency or carcass merit using F1 boars vs purebred boars. I have to assume it would hold true for cattle too. Which breeds are used appears to be more important than 3 way cross vs 4 way cross. I know using duroc x hampshire F1 boars on landrace x yorkshire F1 females is a very popular terminal cross. [/QUOTE]
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