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Understanding Genotype info
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<blockquote data-quote="VirginiaCattle" data-source="post: 1191546" data-attributes="member: 23052"><p>So when I get my bulls tested I get a report on the percentiles they rank for each category there is a test for. Then when the next EPD run is done (every Friday for Angus) the info is incorporated into their EPDs. It can change the value of the EPD itself but more importantly it changes the accuracy. So you could make early selection decisions based on genomic tests. It'd be better to use them once they are incorporated into the EPD though. For example if you had a calf rank in the top 1% of marbling according to his genomics that'd be great. If you find out the genomic test for marbling in Charolais only explains 5% of the variance it might not mean much. So the effect on the EPD will vary by how much each trait can be explained by genetics. </p><p></p><p>Here is an info sheet on genomic testing Angus. Most of the basics remain the same. Obviously the parts about which companies etc could be different for Charolais. <a href="http://www.angus.org/AGI/GE_EPDs_GenomicTraitTests.pdf" target="_blank">http://www.angus.org/AGI/GE_EPDs_GenomicTraitTests.pdf</a> </p><p></p><p>This info sheet is about how they use the results to put it into EPDs: <a href="http://www.angus.org/AGI/GenomicEnhancedEPDs.pdf" target="_blank">http://www.angus.org/AGI/GenomicEnhancedEPDs.pdf</a></p><p></p><p>Somewhere I've seen the equivalent numbers of progeny reports each genomic test can replace in increased accuracy. I can't find it right now. If I run across it again I'll try to send a link.</p></blockquote><p></p>
[QUOTE="VirginiaCattle, post: 1191546, member: 23052"] So when I get my bulls tested I get a report on the percentiles they rank for each category there is a test for. Then when the next EPD run is done (every Friday for Angus) the info is incorporated into their EPDs. It can change the value of the EPD itself but more importantly it changes the accuracy. So you could make early selection decisions based on genomic tests. It'd be better to use them once they are incorporated into the EPD though. For example if you had a calf rank in the top 1% of marbling according to his genomics that'd be great. If you find out the genomic test for marbling in Charolais only explains 5% of the variance it might not mean much. So the effect on the EPD will vary by how much each trait can be explained by genetics. Here is an info sheet on genomic testing Angus. Most of the basics remain the same. Obviously the parts about which companies etc could be different for Charolais. [url]http://www.angus.org/AGI/GE_EPDs_GenomicTraitTests.pdf[/url] This info sheet is about how they use the results to put it into EPDs: [url]http://www.angus.org/AGI/GenomicEnhancedEPDs.pdf[/url] Somewhere I've seen the equivalent numbers of progeny reports each genomic test can replace in increased accuracy. I can't find it right now. If I run across it again I'll try to send a link. [/QUOTE]
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