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Cattle Boards
Breeding / Calving Issues
Stacking low birth weight genetics
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<blockquote data-quote="Son of Butch" data-source="post: 1545296" data-attributes="member: 14585"><p>Actual birth weight is a poor measurement in determining an inherited trait as it is too often a measurement of</p><p>management and environment.</p><p>EPD should be used instead of actual birth weights. EPD is a much better predictor because it factors in actual birth </p><p>weight comparison with herdmates birth weights under the same management and environmental conditions. </p><p></p><p>Accuracy of epds are very important.</p><p>ced 7 and bw 1.3 is breed average</p><p>IF a sire was CED 10 and BW 3.5 with less than .70 acc I would have very low confidence in using on heifers</p><p>when more data comes in those numbers are going to change.... spreads that look too good to be true usually are.</p><p>.70 is my minimum standard for me to believe it.</p></blockquote><p></p>
[QUOTE="Son of Butch, post: 1545296, member: 14585"] Actual birth weight is a poor measurement in determining an inherited trait as it is too often a measurement of management and environment. EPD should be used instead of actual birth weights. EPD is a much better predictor because it factors in actual birth weight comparison with herdmates birth weights under the same management and environmental conditions. Accuracy of epds are very important. ced 7 and bw 1.3 is breed average IF a sire was CED 10 and BW 3.5 with less than .70 acc I would have very low confidence in using on heifers when more data comes in those numbers are going to change.... spreads that look too good to be true usually are. .70 is my minimum standard for me to believe it. [/QUOTE]
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