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<blockquote data-quote="George C" data-source="post: 7685097" data-attributes="member: 23622"><p>Just finished the podcast and it's a great listen.</p><p></p><p>Signet give us separate FEC EBVs for Strongyles (FEC S) and Nematodirus (FEC N) and calculate a heritability for each one. In the latest update they are FEC S 0.12 and FEC N 0.18.</p><p></p><p>Our FEC heritability has always been lower than those reported in NZ. It could well have something to do with the reasons Tim gives. The nature of their worm challenge may also be different with more haemonchus. Some UK flocks do struggle to get high enough mob samples for FEC testing. There are also reports of welfare issues on some farms at mob sample levels which don't seem to be a problem on other farms. I suspect that this due to a higher percentage of the more parasitic Teladorsagia circumcincta in their samples. There was a lot of variation between farms when we were involved in some speciation work. One of the advantages of the IgA work that we are involved with is that you don't have to have such high worm counts to get a meaningful result. </p><p></p><p>For anyone wanting a longer read about our work on FEC and IgA you can access a report on our EIP project on the Performance Recorded Lleyn Breeders website <a href="https://www.prlb.co.uk/latest-news/" target="_blank">https://www.prlb.co.uk/latest-news/</a></p></blockquote><p></p>
[QUOTE="George C, post: 7685097, member: 23622"] Just finished the podcast and it's a great listen. Signet give us separate FEC EBVs for Strongyles (FEC S) and Nematodirus (FEC N) and calculate a heritability for each one. In the latest update they are FEC S 0.12 and FEC N 0.18. Our FEC heritability has always been lower than those reported in NZ. It could well have something to do with the reasons Tim gives. The nature of their worm challenge may also be different with more haemonchus. Some UK flocks do struggle to get high enough mob samples for FEC testing. There are also reports of welfare issues on some farms at mob sample levels which don't seem to be a problem on other farms. I suspect that this due to a higher percentage of the more parasitic Teladorsagia circumcincta in their samples. There was a lot of variation between farms when we were involved in some speciation work. One of the advantages of the IgA work that we are involved with is that you don't have to have such high worm counts to get a meaningful result. For anyone wanting a longer read about our work on FEC and IgA you can access a report on our EIP project on the Performance Recorded Lleyn Breeders website [URL]https://www.prlb.co.uk/latest-news/[/URL] [/QUOTE]
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