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Livestock
Livestock & Forage
ebv debate
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<blockquote data-quote="NZDan" data-source="post: 1880450" data-attributes="member: 1037"><p>Yes I've heard others say that they are getting to variable, they've always had an open flock book and allowed other breeds in providing they were back crossed to 7/8Cpth 1/8other for ewes and 15/16Cpth 1/16Other for rams. It was decided about 10 years ago to drop one cross out so they're now 3/4Cpwth for ewes and 7/8Cpth for rams.</p><p>In reality there hasn't been much crossing at all, and in most studs none at all. Having said that with the wide use of reference sires in the Coopworth and a lot of emphasis on EBVs then an elite ram who does contain other breeds in his back ground can have wide spread effect. One ram from a number of years back in particular springs to mind, he was easily the best Coopworth ram on type and index but contained Texel blood, he was used widely by AI and is probably the main reason the Coopworth contains Myomax/T+ through him and his sons. The Coopworth breeders I know that do cross sell the cross (1/2 or 1/4) as crosses but often the very best of the 3/4 Coopworth ewes are used as replacements. Not a bad thing IMHO as it is with in breed society rules and means the breed can move forward.</p></blockquote><p></p>
[QUOTE="NZDan, post: 1880450, member: 1037"] Yes I've heard others say that they are getting to variable, they've always had an open flock book and allowed other breeds in providing they were back crossed to 7/8Cpth 1/8other for ewes and 15/16Cpth 1/16Other for rams. It was decided about 10 years ago to drop one cross out so they're now 3/4Cpwth for ewes and 7/8Cpth for rams. In reality there hasn't been much crossing at all, and in most studs none at all. Having said that with the wide use of reference sires in the Coopworth and a lot of emphasis on EBVs then an elite ram who does contain other breeds in his back ground can have wide spread effect. One ram from a number of years back in particular springs to mind, he was easily the best Coopworth ram on type and index but contained Texel blood, he was used widely by AI and is probably the main reason the Coopworth contains Myomax/T+ through him and his sons. The Coopworth breeders I know that do cross sell the cross (1/2 or 1/4) as crosses but often the very best of the 3/4 Coopworth ewes are used as replacements. Not a bad thing IMHO as it is with in breed society rules and means the breed can move forward. [/QUOTE]
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ebv debate
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