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Why Genomics Will Be the Future of EPDs
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<blockquote data-quote="Ebenezer" data-source="post: 1583423" data-attributes="member: 24565"><p>The number used for an EPD represents the average expected different on a trait or an index. The range of expected differences still exists. With higher accuracy the range is smaller. That is pretty basic stuff. Where the unknown comes in on a heavy note is what are the rest of the DNA doing as it come in and mix with DNA of another animal at conception. There are effected on parents that we have discussed prior and there is also entropy effects with genetic noise, incomplete transfer, mutations, ... All of these are part of a breeding selection process and can create problems of accuracy to hit the average EPD numbers.</p><p></p><p>I do not doubt that progress will be made on many levels but I do not believe that all unknowns of individual matings will ever disappear. I do not believe that all full sibs will ever be exactly alike. Even with tight linebreeding the diversity oft he next generation allows diversity, selection potential and a means to judge the need to cull.</p></blockquote><p></p>
[QUOTE="Ebenezer, post: 1583423, member: 24565"] The number used for an EPD represents the average expected different on a trait or an index. The range of expected differences still exists. With higher accuracy the range is smaller. That is pretty basic stuff. Where the unknown comes in on a heavy note is what are the rest of the DNA doing as it come in and mix with DNA of another animal at conception. There are effected on parents that we have discussed prior and there is also entropy effects with genetic noise, incomplete transfer, mutations, ... All of these are part of a breeding selection process and can create problems of accuracy to hit the average EPD numbers. I do not doubt that progress will be made on many levels but I do not believe that all unknowns of individual matings will ever disappear. I do not believe that all full sibs will ever be exactly alike. Even with tight linebreeding the diversity oft he next generation allows diversity, selection potential and a means to judge the need to cull. [/QUOTE]
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