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<blockquote data-quote="KNERSIE" data-source="post: 640842" data-attributes="member: 4353"><p>We're just going in circles here.</p><p></p><p>But do tell me how the three flush brothers PD estimate EPD told us of the possible differences?</p><p></p><p>If you have spent even just a few years of breeding cattle you won't need an EPD to tell you there are differences between fullsibs. That is where unproven EPDs fail the industry, the matrix simply don't recognise that fact. If you understand the mathematics behind the calculations and the theory on which it is based you'll understand that the random devision of genes from the parents to the offspring isn't taken into the equation, but the average is used instead, otherwise the three flush brothers wouldn't have started with exactly the same EPDs.</p><p></p><p>I agree that EPDs can be a handy tool to use and I personally do use EBVs, but I use it as its intended, just one more tool. Before basing your entire selection protocol on EPDs, atleast do your homework and understand exactly how they are derived, understand the theories and ASSUMPTIONS made in the process. This will require going into greater detail than you can read on the back page of an AI catalogue.</p></blockquote><p></p>
[QUOTE="KNERSIE, post: 640842, member: 4353"] We're just going in circles here. But do tell me how the three flush brothers PD estimate EPD told us of the possible differences? If you have spent even just a few years of breeding cattle you won't need an EPD to tell you there are differences between fullsibs. That is where unproven EPDs fail the industry, the matrix simply don't recognise that fact. If you understand the mathematics behind the calculations and the theory on which it is based you'll understand that the random devision of genes from the parents to the offspring isn't taken into the equation, but the average is used instead, otherwise the three flush brothers wouldn't have started with exactly the same EPDs. I agree that EPDs can be a handy tool to use and I personally do use EBVs, but I use it as its intended, just one more tool. Before basing your entire selection protocol on EPDs, atleast do your homework and understand exactly how they are derived, understand the theories and ASSUMPTIONS made in the process. This will require going into greater detail than you can read on the back page of an AI catalogue. [/QUOTE]
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