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<blockquote data-quote="cattleman99" data-source="post: 780989" data-attributes="member: 14530"><p>There are definately overall differences in the phenotype but the bulls I used as examples are, in 600U's case it's hard to not find him somewhere in a purebred pedigree in either the US or Canada and in Red Teddy's case he is currently one of the heaviest used bulls in both the US and Canada. </p><p></p><p>My point is there is just to much human interferance in EPD's to make them much use. I've found it's more practical to just ignore them. The other problem with EPD's is when you buy a yearling bull and use him for several years his EPD's are often not even close to being what they were when you bought him. I realize environment, etc can influence things and I would expect to see a slight difference between Canada and the US but not the types of swings you see. I expect higher birth weights in Canada than the US but this shouldn't influence the overall calving ease as for the most part our cows are bigger. They should be having larger calves. </p><p></p><p>DNA on the other hand is beginning to look very interesting to me to use as they are developing more tests. DNA is DNA and isn't going to lie to you.</p></blockquote><p></p>
[QUOTE="cattleman99, post: 780989, member: 14530"] There are definately overall differences in the phenotype but the bulls I used as examples are, in 600U's case it's hard to not find him somewhere in a purebred pedigree in either the US or Canada and in Red Teddy's case he is currently one of the heaviest used bulls in both the US and Canada. My point is there is just to much human interferance in EPD's to make them much use. I've found it's more practical to just ignore them. The other problem with EPD's is when you buy a yearling bull and use him for several years his EPD's are often not even close to being what they were when you bought him. I realize environment, etc can influence things and I would expect to see a slight difference between Canada and the US but not the types of swings you see. I expect higher birth weights in Canada than the US but this shouldn't influence the overall calving ease as for the most part our cows are bigger. They should be having larger calves. DNA on the other hand is beginning to look very interesting to me to use as they are developing more tests. DNA is DNA and isn't going to lie to you. [/QUOTE]
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