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Across breed multi-trait random regression genomic predictions in the Nordic Red dairy cattle

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dc.contributor University of Helsinki, Department of Agricultural Sciences en
dc.contributor University of Helsinki, Department of Mathematics and Statistics en
dc.contributor University of Helsinki, Department of Agricultural Sciences en
dc.contributor.author Makgahlela, Mahlako
dc.contributor.author Mäntysaari, Esa
dc.contributor.author Strandén, Ismo
dc.contributor.author Koivula, Minna
dc.contributor.author Sillanpää, Mikko
dc.contributor.author Nielsen, Ulrik
dc.contributor.author Juga, Jarmo
dc.date.accessioned 2012-06-28T14:20:07Z
dc.date.available 2012-06-28T14:20:07Z
dc.date.issued 2011
dc.identifier.citation Makgahlela , M , Mäntysaari , E , Strandén , I , Koivula , M , Sillanpää , M , Nielsen , U & Juga , J 2011 , ' Across breed multi-trait random regression genomic predictions in the Nordic Red dairy cattle ' in Proceedings of the 2011 Interbull meeting : Stavanger, Norway, August 27-29, 2011 , pp. 42-46 Interbull Bulletin , no. 44 . en
dc.identifier.other PURE: 20675460
dc.identifier.uri http://hdl.handle.net/10138/34849
dc.description.abstract Current genomic prediction equations, when carried out in multiple populations with admixed structures ignore structure and assume these populations are uniform. The observed reliabilities of direct genomic breeding values (DGV) for unproven bulls in these populations so far have been low. The current study evaluated reliabilities of DGV in selection candidates using multi-trait random regression model which account for interactions between marker effects and breed of origin in the admixed Nordic Red dairy cattle. Our breed-specific model used breed proportions (BP) as random predictors and deregressed proofs of estimated breeding values (DRP) as response variables weighted by approximated reliability of DRP. Reliabilities were explored as squared correlation between DRP and DGV, weighted by the mean reliability of DRP. Estimated reliabilities were low for milk (0.32) and protein (0.32) and slightly higher (0.42) for fat. Observed reliabilities were similar to those estimated assuming homogenous structure. The Nordic Red cattle is admixed but closely related, thus, the model under investigation may have been unable to differentiate additive genetic effects by breed of origin with a medium dense marker data en
dc.format.extent 5
dc.language.iso eng
dc.relation.ispartof Proceedings of the 2011 Interbull meeting Stavanger, Norway, August 27-29, 2011
dc.relation.ispartofseries Interbull Bulletin
dc.relation.uri http://www.interbull.org/images/stories/Makgahlela.pdf
dc.subject 412 Animal science, dairy science en
dc.title Across breed multi-trait random regression genomic predictions in the Nordic Red dairy cattle en
dc.type B3 Unrefereed article in conference proceedings
dc.type.dcmitype textfile
dc.type.uri info:eu-repo/semantics/conferencePaper
dc.contributor.pbl

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