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Artificial Insemination (AI) for Cattle
AI Bulls--comments appreciated
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<blockquote data-quote="Air gator" data-source="post: 1538830" data-attributes="member: 20755"><p>I think the Genomic testing is better than epds...unless you have REALLY high accuracy (they may be on par).</p><p>I think genomic testing gives you a jumpstart on improving your herd.</p><p>I say this because I tested 3 flushmates. </p><p>The milk score helps you a lot. There are so many bulls now that seem to be way above breed average or way below breed average for milk. If you choose the wrong bull because the epds for milk are the same for two sisters but the reality is that one cow produces a lot more milk than the other one....you could have a calf who turns into a cow you can't afford to feed.</p><p>If you have 3 sisters, how long would it take you to decide which one will have the most growth, fertility, milk, etc?</p><p>It would take quite a while for you to wean a few calves...and you could blame the bull or your grass or whatever. It is a leap of faith to use genomic testing and time will tell if we are right to trust the science or whether or not we will realize we messed up somewhere.</p><p>And by the way, there must be a rule that they can't change a milk epd by more than a certain number.</p><p>Take a moment to pull up the Rutherford Ranches Dispersal catalog from the Archived sale catalogs. Go all the way to the back and for all the current bulls that they are selling semen on they have the Genomic scores listed, as well as the epds.</p><p>All these bulls have been tested the same way and have been given a score. But, the epds and the genomic scores are not uniform or calibrated the same way. You would think that every bull with a 25 for milk would have the same milk epd but from what I saw that is not the case. They have the chart where you can see the most the epds can change from one accuracy to another. I'm not sure if that isn't the problem with regards to how much epds can be changed based on genomic scores.</p></blockquote><p></p>
[QUOTE="Air gator, post: 1538830, member: 20755"] I think the Genomic testing is better than epds...unless you have REALLY high accuracy (they may be on par). I think genomic testing gives you a jumpstart on improving your herd. I say this because I tested 3 flushmates. The milk score helps you a lot. There are so many bulls now that seem to be way above breed average or way below breed average for milk. If you choose the wrong bull because the epds for milk are the same for two sisters but the reality is that one cow produces a lot more milk than the other one....you could have a calf who turns into a cow you can't afford to feed. If you have 3 sisters, how long would it take you to decide which one will have the most growth, fertility, milk, etc? It would take quite a while for you to wean a few calves...and you could blame the bull or your grass or whatever. It is a leap of faith to use genomic testing and time will tell if we are right to trust the science or whether or not we will realize we messed up somewhere. And by the way, there must be a rule that they can't change a milk epd by more than a certain number. Take a moment to pull up the Rutherford Ranches Dispersal catalog from the Archived sale catalogs. Go all the way to the back and for all the current bulls that they are selling semen on they have the Genomic scores listed, as well as the epds. All these bulls have been tested the same way and have been given a score. But, the epds and the genomic scores are not uniform or calibrated the same way. You would think that every bull with a 25 for milk would have the same milk epd but from what I saw that is not the case. They have the chart where you can see the most the epds can change from one accuracy to another. I'm not sure if that isn't the problem with regards to how much epds can be changed based on genomic scores. [/QUOTE]
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