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<blockquote data-quote="cbcr" data-source="post: 830007" data-attributes="member: 16303"><p>Lot of good discussion and comments on here.</p><p></p><p>I think too many times that producers do try and make a single trait selection with the thought that what they are hoping to change can be achieved faster. But like Doc said, this is a wrong approach. There is a patern to traits so selections has to be made very carefully.</p><p></p><p>While many use EPD's for BW, WW, YW, Milk, etc., there are no EPD's that show functional traits. One EPD trait that I don't see how it can be accurate is the stayability one. To me, unless you can track an animal from birth to death, there is no way to accurately have a stayability EPD.</p><p></p><p>I have seen several posts, not only on this one where you are all talking about good udders, feet and legs, etc. But the only time we see individual traits are in the sire catalogs.</p><p></p><p>In the dairy industry there is an analysis that has been used for years called aAa. Basically what aAa is is a series of number 1 thru 6 and each number correlates to certain traits. Bulls are coded from strongest to weakest and females are coded from weakest to strongest. So if a female is coded 123456 the ideally you would want to mate her to a bull that is coded 123456. This system works for all dairy breeds. I don't know if anything like this can be done in the beef industry or not. </p><p></p><p>Another thing, I feel that trait analysis would be much easier to monitor and follow than EPD's. Why? Well mainly trait analysis is based on the appearance of the animal so weights wouldn't be required. Trait selection along with EPD's would give producers better information with which to make breeding decisions.</p></blockquote><p></p>
[QUOTE="cbcr, post: 830007, member: 16303"] Lot of good discussion and comments on here. I think too many times that producers do try and make a single trait selection with the thought that what they are hoping to change can be achieved faster. But like Doc said, this is a wrong approach. There is a patern to traits so selections has to be made very carefully. While many use EPD's for BW, WW, YW, Milk, etc., there are no EPD's that show functional traits. One EPD trait that I don't see how it can be accurate is the stayability one. To me, unless you can track an animal from birth to death, there is no way to accurately have a stayability EPD. I have seen several posts, not only on this one where you are all talking about good udders, feet and legs, etc. But the only time we see individual traits are in the sire catalogs. In the dairy industry there is an analysis that has been used for years called aAa. Basically what aAa is is a series of number 1 thru 6 and each number correlates to certain traits. Bulls are coded from strongest to weakest and females are coded from weakest to strongest. So if a female is coded 123456 the ideally you would want to mate her to a bull that is coded 123456. This system works for all dairy breeds. I don't know if anything like this can be done in the beef industry or not. Another thing, I feel that trait analysis would be much easier to monitor and follow than EPD's. Why? Well mainly trait analysis is based on the appearance of the animal so weights wouldn't be required. Trait selection along with EPD's would give producers better information with which to make breeding decisions. [/QUOTE]
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