title: Multiple trait genomic evaluation of conception rate in Holsteins.
abstract: A national data set of artificial inseminations in US Holsteins was used to obtain genetic evaluations for conception rate (CR). The objective of this study was to investigate the feasibility and resulting accuracy from using all available phenotypic, pedigree, and genomic information. Evaluations were performed by regular BLUP or by BLUP with the traditional pedigree and genomic relationships combined in a unified single-step procedure (SSP). Genetic parameters of CR in the first 3 parities were estimated with data from New York State only. Heritability estimates were around 2% and genetic correlations between CR in different parities were >0.73. The R(2) obtained with the SSP were almost twice as large as those achieved with regular BLUP. Computing the SSP took 2h, and it was 33% slower than a regular BLUP. A multiple-trait evaluation of CR using the SSP is both possible and advantageous.
authors.affiliation: Animal and Dairy Science Department, University of Georgia, Athens 30602, USA. iaguilar@inia.org.uy
authors.forename: I
authors.initials: I
authors.lastname: Aguilar
authors.forename: I
authors.initials: I
authors.lastname: Misztal
authors.forename: S
authors.initials: S
authors.lastname: Tsuruta
authors.forename: G R
authors.initials: GR
authors.lastname: Wiggans
authors.forename: T J
authors.initials: TJ
authors.lastname: Lawlor
mesh_terms: D000818:Animals; D002417:Cattle / Q000235:genetics / Q000502:physiology*; D005240:Feasibility Studies; D005260:Female; D016678:Genome; D008957:Models, Genetic; D010375:Pedigree; D010641:Phenotype; D011247:Pregnancy; D018873:Pregnancy Rate; D015203:Reproducibility of Results; D013045:Species Specificity