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<blockquote data-quote="Dylan Biggs" data-source="post: 829372" data-attributes="member: 14282"><p>Doc got me thinking in another post about the reality of multi trait selection.</p><p></p><p></p><p>Lets say you are in the process of building up a registered or commercial Angus(substitute any maternal breed you like) cow herd, and you have decided on the following functional selection emphasis in that pursuit. Depending on the breed of choice and regional climate a few of these preferences may not apply.</p><p></p><p></p><p>As regards ww growth, breed average.</p><p></p><p>Less than average BW </p><p></p><p>Less then average mature height.</p><p></p><p>Less than average mature weight.</p><p></p><p>Things I want to be <strong><em>more than average</em></strong> , I wouldn't want to be percieved as a total under achiever. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>Fertility, as much as possible, I am a glutton, both sires and dams, is there such a thing as too much.</p><p></p><p>Structural soundness of feet, as the average Angus anymore is very poor footed.</p><p></p><p>Udder quality, above average for sure.</p><p></p><p>Disposition as good as possible with out compromising maternal protectiveness and attentiveness.</p><p></p><p>Mothering ability, can you have too much?</p><p></p><p>Calving ease, more than average.</p><p></p><p>Constitution, more than average, seems the really growthy calves are quite often more prone to get sick than the average calves, probably mother natures desire for average.</p><p></p><p>Longevity, as much as I can get, I think.</p><p></p><p>Hair coat, for sub arctic weather, more than average.</p><p></p><p>Maternal attentiveness, a trait that seems to be waning. In the seventies and eighties the Black cows either were always with their calves, or knew where their calves were at all times. When you showed up and it was time to go they would go get their calves and they would stay mothered up through the entire move regardless of distance.</p><p></p><p>For breeding bulls above average for a clean tight sheath, definitely no</p><p>long loose pendulous sheaths. And no tolerance for bulls that prolapse there prepuce.</p><p></p><p>Libido, above average.</p><p></p><p>Servicing ability, above average for agility and athleticism.</p><p></p><p>And last, but not least, the ability to do all of the above under a management system who's profit strategy is optimal productivity utilizing the most cost effective regionally accessible inputs. </p><p></p><p>So in light of that multi selection emphasis, my experience has been that finding all of those in one package is almost impossible. </p><p></p><p>So the question becomes what are you willing to compromise and what system in terms of accessing degree of specific trait improvement required vs degree of specific trait compromise you can risk, are you going to employ?</p><p></p><p>To me this is the ongoing challenge with breeding stock selection especially when it comes to sires because of the degree of proportional population impact.</p><p></p><p>Doc, your thoughts and the thoughts of anyone else who wants to wade in would be appreciated. :tiphat:</p></blockquote><p></p>
[QUOTE="Dylan Biggs, post: 829372, member: 14282"] Doc got me thinking in another post about the reality of multi trait selection. Lets say you are in the process of building up a registered or commercial Angus(substitute any maternal breed you like) cow herd, and you have decided on the following functional selection emphasis in that pursuit. Depending on the breed of choice and regional climate a few of these preferences may not apply. As regards ww growth, breed average. Less than average BW Less then average mature height. Less than average mature weight. Things I want to be [b][i]more than average[/i][/b] , I wouldn't want to be percieved as a total under achiever. :) Fertility, as much as possible, I am a glutton, both sires and dams, is there such a thing as too much. Structural soundness of feet, as the average Angus anymore is very poor footed. Udder quality, above average for sure. Disposition as good as possible with out compromising maternal protectiveness and attentiveness. Mothering ability, can you have too much? Calving ease, more than average. Constitution, more than average, seems the really growthy calves are quite often more prone to get sick than the average calves, probably mother natures desire for average. Longevity, as much as I can get, I think. Hair coat, for sub arctic weather, more than average. Maternal attentiveness, a trait that seems to be waning. In the seventies and eighties the Black cows either were always with their calves, or knew where their calves were at all times. When you showed up and it was time to go they would go get their calves and they would stay mothered up through the entire move regardless of distance. For breeding bulls above average for a clean tight sheath, definitely no long loose pendulous sheaths. And no tolerance for bulls that prolapse there prepuce. Libido, above average. Servicing ability, above average for agility and athleticism. And last, but not least, the ability to do all of the above under a management system who's profit strategy is optimal productivity utilizing the most cost effective regionally accessible inputs. So in light of that multi selection emphasis, my experience has been that finding all of those in one package is almost impossible. So the question becomes what are you willing to compromise and what system in terms of accessing degree of specific trait improvement required vs degree of specific trait compromise you can risk, are you going to employ? To me this is the ongoing challenge with breeding stock selection especially when it comes to sires because of the degree of proportional population impact. Doc, your thoughts and the thoughts of anyone else who wants to wade in would be appreciated. :tiphat: [/QUOTE]
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