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<blockquote data-quote="SPH" data-source="post: 1291245" data-attributes="member: 20580"><p>George already hit on the subject about docility EPDs and I have to agree, the reason why you can't trust geonomics for tempterment is because temperment is s subjective trait not quantitative like weights are. The only way you really can collect any data on temperment is by having the breeder score the animal which leaves a lot open to interpretation of what is bad tempermant compared to good because what 1 guy might think is a wild in their herd that same behavior might be typical of another herd and that breeder wouldn't cull for it. There probably are bulls you can trace some docility issues too but I doubt you'd be able to do that with good accuracy using an EPD for it. I realize a guy could fudge on their weights too I'm sure but it's a lot easier to get accuracy from lots of actual raw weights than it is to score an animal for how 1 guy thinks it behaves. Plus on top of that who is to say that enough people will actually submit docility scores anyways when you take the Hereford breed for example, only 104 breeders from the entire country made TPR status when the breed has thousands of breeders (I don't know the actual total number of active memberships) that 104 is a pretty small percentage that is reporting back all TPR data. If only a small percentage are just reporting the bare minimums for TPR status imagine trying to put any kind of accuracy on a docility EPD number when most probably still would not be scoring their herd for it. That is why I have a hard time getting behind having a docility EPD. Herefords just added udder EPDs in the past year, I don't really put much faith in them right now because there just can't be a lot of data behind them yet. We've been submitting udder scores for several years now but even with that if I pull up some of our oldest cows accuracies are still 40% or less. We're not going to make any kind of decisions based off an udder EPD, we're going to make them using physical evidence on udder structure when making those kind of decisions.</p><p></p><p><a href="http://www.hereford.org/node/11226" target="_blank">http://www.hereford.org/node/11226</a></p></blockquote><p></p>
[QUOTE="SPH, post: 1291245, member: 20580"] George already hit on the subject about docility EPDs and I have to agree, the reason why you can't trust geonomics for tempterment is because temperment is s subjective trait not quantitative like weights are. The only way you really can collect any data on temperment is by having the breeder score the animal which leaves a lot open to interpretation of what is bad tempermant compared to good because what 1 guy might think is a wild in their herd that same behavior might be typical of another herd and that breeder wouldn't cull for it. There probably are bulls you can trace some docility issues too but I doubt you'd be able to do that with good accuracy using an EPD for it. I realize a guy could fudge on their weights too I'm sure but it's a lot easier to get accuracy from lots of actual raw weights than it is to score an animal for how 1 guy thinks it behaves. Plus on top of that who is to say that enough people will actually submit docility scores anyways when you take the Hereford breed for example, only 104 breeders from the entire country made TPR status when the breed has thousands of breeders (I don't know the actual total number of active memberships) that 104 is a pretty small percentage that is reporting back all TPR data. If only a small percentage are just reporting the bare minimums for TPR status imagine trying to put any kind of accuracy on a docility EPD number when most probably still would not be scoring their herd for it. That is why I have a hard time getting behind having a docility EPD. Herefords just added udder EPDs in the past year, I don't really put much faith in them right now because there just can't be a lot of data behind them yet. We've been submitting udder scores for several years now but even with that if I pull up some of our oldest cows accuracies are still 40% or less. We're not going to make any kind of decisions based off an udder EPD, we're going to make them using physical evidence on udder structure when making those kind of decisions. [url]http://www.hereford.org/node/11226[/url] [/QUOTE]
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