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<blockquote data-quote="ollie" data-source="post: 61523" data-attributes="member: 323"><p>One point of interest that I would like for you to address Frankie which I am not sure I understand. </p><p>If I am not wrong the epd figure is the number a given sire "should" produce which is one half of his genetic potential when mated to the average cow within the breed. </p><p>An example would be bull X with a ww of +50 should sire calves 25 lbs heavier on average than bull Y with a ww of +25 .</p><p>These formulas if for an angus bull would be calculated using the average of all the angus cows ww as the divider of each of the respective bulls progeny.</p><p>For argument lets say the average angus cows ww epd using the marc ABC epd is zero . What should we expect when bull Y and Bull X are mated to a set of huge Maine cows with a ABC epd of +50?</p><p>How would that vary when the same bulls were mated to a set of small Jersey cows with an ABC epd of -100?</p><p>Am I right in thinking the Jerseys would show more genetic expression from the bull because they are a smaller denominator ?</p><p>Conversley wouldn't the higher preformance set of mains show less difference between the two bulls?</p></blockquote><p></p>
[QUOTE="ollie, post: 61523, member: 323"] One point of interest that I would like for you to address Frankie which I am not sure I understand. If I am not wrong the epd figure is the number a given sire "should" produce which is one half of his genetic potential when mated to the average cow within the breed. An example would be bull X with a ww of +50 should sire calves 25 lbs heavier on average than bull Y with a ww of +25 . These formulas if for an angus bull would be calculated using the average of all the angus cows ww as the divider of each of the respective bulls progeny. For argument lets say the average angus cows ww epd using the marc ABC epd is zero . What should we expect when bull Y and Bull X are mated to a set of huge Maine cows with a ABC epd of +50? How would that vary when the same bulls were mated to a set of small Jersey cows with an ABC epd of -100? Am I right in thinking the Jerseys would show more genetic expression from the bull because they are a smaller denominator ? Conversley wouldn't the higher preformance set of mains show less difference between the two bulls? [/QUOTE]
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