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FOCUS - on 'Milk' Selection
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<blockquote data-quote="robert" data-source="post: 974753" data-attributes="member: 9171"><p>not that simple, depends on ratio's, contemporary groups, actual and adjusted weights. If the increase in weight is attributable to selection for growth and the average weaning ratio of daughters is less than 100 there's a good chance milk EPD will go down. Again, trying to apply a tool for evaluating population genetics to individual experiences will yield no valuable information. Most cows won't have enough progeny to change their milk epd significantly anyway, the biggest changes will come from changes in the sires of those dams. Most bulls won't sire enough registered progeny that result in enough registered production females to significantly change their own milk epds. In many cases because a sire has many progeny with a high accuracy is by no means a certainty that he will pass on the trait he supposedly 'accurate' for.</p></blockquote><p></p>
[QUOTE="robert, post: 974753, member: 9171"] not that simple, depends on ratio's, contemporary groups, actual and adjusted weights. If the increase in weight is attributable to selection for growth and the average weaning ratio of daughters is less than 100 there's a good chance milk EPD will go down. Again, trying to apply a tool for evaluating population genetics to individual experiences will yield no valuable information. Most cows won't have enough progeny to change their milk epd significantly anyway, the biggest changes will come from changes in the sires of those dams. Most bulls won't sire enough registered progeny that result in enough registered production females to significantly change their own milk epds. In many cases because a sire has many progeny with a high accuracy is by no means a certainty that he will pass on the trait he supposedly 'accurate' for. [/QUOTE]
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