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United States Department of Agriculture

Agricultural Research Service

Research Project: ENHANCING GENETIC MERIT OF RUMINANTS THROUGH GENOME SELECTION AND ANALYSIS

Location: Animal Genomics and Improvement Laboratory

Title: Accuracy of genomic predictions in Nellore beef cattle

Authors
item Carvalheiro, Roberto -
item Mcewan, John -
item Neves, Haroldo H.R. -
item Utsunomiya, Yuri -
item Perez O'Brien, Ana -
item Boison, Ana -
item Solkner, Johann -
item Schenkel, Flavio -
item Van Tassell, Curtis
item Sonstegard, Tad
item Garcia, Fernando -

Submitted to: Genetics Selection Evolution
Publication Type: Proceedings
Publication Acceptance Date: September 3, 2013
Publication Date: October 20, 2013
Citation: Carvalheiro, R., Mcewan, J.C., Neves, H., Utsunomiya, Y.T., Perez O'Brien, A.M., Boison, A., Solkner, J., Schenkel, F., Van Tassell, C.P., Sonstegard, T.S., Garcia, F. 2013. Accuracy of genomic predictions in Nellore beef cattle. Genetics Selection Evolution. 20:171-174.

Technical Abstract: This study was carried out to assess the quality of genomic predictions in a Nellore beef cattle population, for 14 growth, carcass composition and reproduction traits, evaluated either at weaning or as yearlings. A forward prediction scheme was applied, so that information on a set of older animals (bulls and cows with accurate proofs in 2007) was employed to derive genomic prediction equations, while information on younger bulls (2012 proofs) was considered for validation purposes. The validation accuracies of genomic predictions averaged 0.47, consistent with the expectation for such statistics. Accuracies for two selection indices including either weaning traits (WI) or both weaning and yearling traits (FI) were 0.44 and 0.58, respectively. For younger animals with own performance, genomic predictions increased by 10% (on average) the individual accuracies for both WI and FI.

Last Modified: 12/26/2014
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