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Entering performance data
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<blockquote data-quote="Herefords.US" data-source="post: 627197" data-attributes="member: 3972"><p>I believe in heterosis, inbreeding depression, and I strongly believe that you can cross two linebred lines of Herefords and get some heterosis from that cross that can/will be extended into further generations.</p><p></p><p>On the inaccuracy of raw EPDs of Herefords, I also agree with bigag03. </p><p></p><p>When comparing the EPDs of closed herds with others, if there hasn't been a significant amount of "head-to-head" competition in the herd with highly proven bulls, the resulting EPDs (not the performance data) just don't seem to be very useful. </p><p></p><p>On the other hand, if highly proven bulls of outcross lines are used, would the resulting EPDs accurately factor in the effect that heterosis and inbreeding depression has on the inbred line? I'd bet not.</p><p></p><p>EPD wise, it looks like the linebred cattle end up unfairly judged either way.</p><p></p><p>George</p></blockquote><p></p>
[QUOTE="Herefords.US, post: 627197, member: 3972"] I believe in heterosis, inbreeding depression, and I strongly believe that you can cross two linebred lines of Herefords and get some heterosis from that cross that can/will be extended into further generations. On the inaccuracy of raw EPDs of Herefords, I also agree with bigag03. When comparing the EPDs of closed herds with others, if there hasn't been a significant amount of "head-to-head" competition in the herd with highly proven bulls, the resulting EPDs (not the performance data) just don't seem to be very useful. On the other hand, if highly proven bulls of outcross lines are used, would the resulting EPDs accurately factor in the effect that heterosis and inbreeding depression has on the inbred line? I'd bet not. EPD wise, it looks like the linebred cattle end up unfairly judged either way. George [/QUOTE]
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