Comparison of Model Reliabilities from Single-Step and Bivariate Blending Methods

Publikation: Bidrag til bog/antologi/rapport/proceedingKonferencebidrag i proceedingsForskning

  • Matti Taskinen, MTT Agrifood Research Finland, Biotechnology and Food Research, Biometrical Genetics, Finland
  • Esa Mäntysaari, MTT Agrifood Research Finland, Biotechnology and Food Research, Biometrical Genetics, Finland
  • Martin Lidauer, MTT Agrifood Research Finland, Biotechnology and Food Research, Biometrical Genetics, Finland
  • Timo Knürr, MTT Agrifood Research Finland, Biotechnology and Food Research, Biometrical Genetics, Finland
  • Jukka Pösö, Faba co-op, Finland
  • Guosheng Su
  • Gert Pedersen Aamand, NAV Nordic Cattle Genetic Evaluation, Danmark
  • Ismo Strandén, MTT Agrifood Research Finland, Biotechnology and Food Research, Biometrical Genetics, Finland
Model based reliabilities in genetic evaluation are compared between three methods: animal model BLUP, single-step BLUP, and bivariate blending after genomic BLUP. The original bivariate blending is revised in this work to better account animal models. The study data is extracted from the production trait evaluation of Nordic Red dairy cattle. Genotyped bulls with daughters are used as training animals, and genotyped bulls and producing cows as candidate animals. For simplicity, size of the data is chosen so that the full inverses of the mixed model equation coefficient matrices can be calculated. Model reliabilities by the single-step and the bivariate blending methods were higher than by animal model due to genomic information. Compared to the single-step method, the bivariate blending method reliability estimates were, in general, lower. Computationally bivariate blending method was, on the other hand, lighter than the single-step method.

OriginalsprogEngelsk
TitelProceedings of the 2013 Interbull meeting : Interbull Bulletin
Antal sider6
Vol/bind47
UdgivelsesstedSLU PrintOffice
ForlagInternational Bull Evaluation Service
Udgivelsesår23 aug. 2013
Sider246-251
ISBN (trykt)1011-6079
StatusUdgivet - 23 aug. 2013
BegivenhedINTERBULL MEETING - Nates, Frankrig
Varighed: 23 aug. 201325 aug. 2013
Konferencens nummer: 2013

Konference

KonferenceINTERBULL MEETING
Nummer2013
LandFrankrig
ByNates
Periode23/08/201325/08/2013

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