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<blockquote data-quote="alexfarms" data-source="post: 627129" data-attributes="member: 8677"><p>If I only owned the inbred animals and no outcross animals then would the epds for my inbreds be accurate "for anyone else buying and breeding my cattle"? I am not making a false comparison by segregating the inbreds into a separate contemporary group, because I am only comparing them to each other and not other outcross animals. I probably had the same reaction as you are now when I first noticed Miles City was segregating their first calf heifers into a separate contemporary group. If you stop and think about it a little bit you will realize that keeping them separate has no effect on other cattles epds at all. The more you split your cattle into separate contemporary groups, for valid reasons, the better genetic analysis you will get in the end result. It may be slower and take more calf crops, but it will be more accurate in the long run. Sure there are ways a person could build contemporary groups to make one sires calves look more favorable than another sires calves and that may be being done, but that is not what I am doing and I have never done that. If the genetic analysis took inbreeding affects into account in the anaylsis then splitting them for that reason would not be necessary, you could still do it and not be fudging the data though. Do you believe in heterosis? Do you believe in getting a genetic "snap" when you cross two inbred lines? If you believe in either one of those, then you ought to be able to understand why I want to get the best genetic analysis I can of the inbred line as it's own contemporary group.</p></blockquote><p></p>
[QUOTE="alexfarms, post: 627129, member: 8677"] If I only owned the inbred animals and no outcross animals then would the epds for my inbreds be accurate "for anyone else buying and breeding my cattle"? I am not making a false comparison by segregating the inbreds into a separate contemporary group, because I am only comparing them to each other and not other outcross animals. I probably had the same reaction as you are now when I first noticed Miles City was segregating their first calf heifers into a separate contemporary group. If you stop and think about it a little bit you will realize that keeping them separate has no effect on other cattles epds at all. The more you split your cattle into separate contemporary groups, for valid reasons, the better genetic analysis you will get in the end result. It may be slower and take more calf crops, but it will be more accurate in the long run. Sure there are ways a person could build contemporary groups to make one sires calves look more favorable than another sires calves and that may be being done, but that is not what I am doing and I have never done that. If the genetic analysis took inbreeding affects into account in the anaylsis then splitting them for that reason would not be necessary, you could still do it and not be fudging the data though. Do you believe in heterosis? Do you believe in getting a genetic "snap" when you cross two inbred lines? If you believe in either one of those, then you ought to be able to understand why I want to get the best genetic analysis I can of the inbred line as it's own contemporary group. [/QUOTE]
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