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<blockquote data-quote="Brandonm2" data-source="post: 295350" data-attributes="member: 2095"><p>Actually you are wrong, Frankie EPDs can and ARE used to GUESS at individual performance (though are somewhat more accurate if used to predict a group's performance). The EPD is simply half of the old EBV values (true breeding values) they used too calculate and still do in some countries like Australia. You can be reasonably assured that a potbelly load of Angus steers with an avg EPD yearling wt value of +100 are going to grow out better than a potbelly load with an avg EPD yearling wt value of 50. How accurate is that +100 lb (double the +50#) estimate???? I wouldn't bet on it being too close; but I would bet that the big growthy calves with the really high EPDs will noticably outweigh those smaller calves with the average EPDs when both of em are fed the same ration for 100 days in a feedlot. The most common calculation of individual performance we actually DO is when you look at a heifer's birth wt EPD and then try too find a bull that will moderate that number too increase the likelihood that the first calf will be born with the least amount of trouble. Again I don't know how high the individual accuracy of that calculation is (I bet it is not close to perfect); but over time and a lot of heifers I do think you get a lower average birth wt by doing that.</p></blockquote><p></p>
[QUOTE="Brandonm2, post: 295350, member: 2095"] Actually you are wrong, Frankie EPDs can and ARE used to GUESS at individual performance (though are somewhat more accurate if used to predict a group's performance). The EPD is simply half of the old EBV values (true breeding values) they used too calculate and still do in some countries like Australia. You can be reasonably assured that a potbelly load of Angus steers with an avg EPD yearling wt value of +100 are going to grow out better than a potbelly load with an avg EPD yearling wt value of 50. How accurate is that +100 lb (double the +50#) estimate???? I wouldn't bet on it being too close; but I would bet that the big growthy calves with the really high EPDs will noticably outweigh those smaller calves with the average EPDs when both of em are fed the same ration for 100 days in a feedlot. The most common calculation of individual performance we actually DO is when you look at a heifer's birth wt EPD and then try too find a bull that will moderate that number too increase the likelihood that the first calf will be born with the least amount of trouble. Again I don't know how high the individual accuracy of that calculation is (I bet it is not close to perfect); but over time and a lot of heifers I do think you get a lower average birth wt by doing that. [/QUOTE]
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