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Cattle Boards
Breeding / Calving Issues
A question for commercial guys.
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<blockquote data-quote="mrvictordomino" data-source="post: 1477861" data-attributes="member: 14333"><p>Sewell's experiment ran for, what, 20 years with a closed population? Most closed populations can be maintained by phenotypic selection once a base is established and the breeder recognizes the type he is going to get from those animals. The theory of population crash is over exaggerated and yet in the initial years I would expect 85% removal of potential lines in a linebreeding effort. Not total loss but recognization that a close population will not survive in that particular gene pool.</p><p></p><p>Natural populations allow death and environment to take out extremes. Nobody measures output on wild populations. Nobody controls wandering males in wild populations. Not a great parallel for me.</p><p></p><p><strong><span style="color: #BF0000">Good for a commercial breeder: the crossing of the most intensely linebred bred for specific purposes for the most hybrid vigor and the most potential profit.</span></strong> Look at your competitors: broilers, hogs, sheep. Maternal lines crossed over with terminal sires for all calves headed to slaughter. Beef folks still are on the "do all" model and losing ground because of it.</p><p></p><p><strong><span style="color: #BF0000">Just an opinion knowing that few will ever buckle down and breed their cattle for the long term good.</span></strong></p><p><strong><span style="color: #BF0000"></span></strong></p><p>Good post Ebenezer, and very true.</p></blockquote><p></p>
[QUOTE="mrvictordomino, post: 1477861, member: 14333"] Sewell's experiment ran for, what, 20 years with a closed population? Most closed populations can be maintained by phenotypic selection once a base is established and the breeder recognizes the type he is going to get from those animals. The theory of population crash is over exaggerated and yet in the initial years I would expect 85% removal of potential lines in a linebreeding effort. Not total loss but recognization that a close population will not survive in that particular gene pool. Natural populations allow death and environment to take out extremes. Nobody measures output on wild populations. Nobody controls wandering males in wild populations. Not a great parallel for me. [b][color=#BF0000]Good for a commercial breeder: the crossing of the most intensely linebred bred for specific purposes for the most hybrid vigor and the most potential profit.[/color][/b] Look at your competitors: broilers, hogs, sheep. Maternal lines crossed over with terminal sires for all calves headed to slaughter. Beef folks still are on the "do all" model and losing ground because of it. [b][color=#BF0000]Just an opinion knowing that few will ever buckle down and breed their cattle for the long term good. [/color][/b] Good post Ebenezer, and very true. [/QUOTE]
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A question for commercial guys.
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