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Can using different breeds of bulls cause problems?
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<blockquote data-quote="Nesikep" data-source="post: 1209182" data-attributes="member: 9096"><p>Well if we want to revive the Hereford breed purity thread....</p><p>My cattle are mutts... The most crossed up ones are 6 breeds, the least are about 3 breeds. </p><p></p><p>I'm going to refer you to any of DocHarris's posts about selection, I think he makes it pretty clear... He usually says something along the lines of "the breed is unimportant, as long as you are consistent in the <em>multiple traits</em> you're selecting for and they're <em>balanced</em>.</p><p></p><p>Our selection was a bit hodge-podge our first 10 or 15 years, but we did always get quality bulls.. So by hook or by crook, our herd still got better... I think we've improved it enough now that further improvements will need to be explicit and deliberate.</p><p></p><p>I think a lot of the fuss about too many breeds in an animal are a little exaggerated.. If you use purebred bulls consistently, the relevance of a breed 5 generations back is going to be pretty small.. If you've selected for quality animals, I don't see a big deal with it in a commercial environment... If you're using mongrel bulls on mongrel cows, you can have 8 breeds in only 2 generations, each one contributing 12.5%, as opposed to a decreasing scale of 50%, 25%, 12.5%, 6.25%, and finally the fifth breed would only be 3% if you used PB bulls... Not much to be concerned about there.</p></blockquote><p></p>
[QUOTE="Nesikep, post: 1209182, member: 9096"] Well if we want to revive the Hereford breed purity thread.... My cattle are mutts... The most crossed up ones are 6 breeds, the least are about 3 breeds. I'm going to refer you to any of DocHarris's posts about selection, I think he makes it pretty clear... He usually says something along the lines of "the breed is unimportant, as long as you are consistent in the [i]multiple traits[/i] you're selecting for and they're [i]balanced[/i]. Our selection was a bit hodge-podge our first 10 or 15 years, but we did always get quality bulls.. So by hook or by crook, our herd still got better... I think we've improved it enough now that further improvements will need to be explicit and deliberate. I think a lot of the fuss about too many breeds in an animal are a little exaggerated.. If you use purebred bulls consistently, the relevance of a breed 5 generations back is going to be pretty small.. If you've selected for quality animals, I don't see a big deal with it in a commercial environment... If you're using mongrel bulls on mongrel cows, you can have 8 breeds in only 2 generations, each one contributing 12.5%, as opposed to a decreasing scale of 50%, 25%, 12.5%, 6.25%, and finally the fifth breed would only be 3% if you used PB bulls... Not much to be concerned about there. [/QUOTE]
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