Genomic selection for meat quality traits in Nelore cattle

Autor(es):Mostrar menos -

Braga Magalhaes, Ana Fabricia ^[1] ; Schenkel, Flavio Schramm ^[2] ; Garcia, Diogo Anastacio ^[3] ; Mansan Gordo, Daniel Gustavo ^[1] ; Tonussi, Rafael Lara ^[1] ; Espigolan, Rafael ^[1] ; de Oliveira Silva, Rafael Medeiros ^[1] ; Braz, Camila Urbano ^[1] ; Fernandes Junior, Gerardo Alves ^[1] ; Baldi, Fernando ^[1] ; Carvalheiro, Roberto ^[1] ; Boligon, Arione Augusti ^[4] ; de Oliveira, Henrique Nunes ^[1] ; Loyola Chardulo, Luis Arthur ^[5] ; de Albuquerque, Lucia Galvao ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ Unesp, Sch Agr & Vet Sci, Jaboticabal, SP - Brazil

^[2] Univ Guelph, Ctr Genet Improvement Livestock, Guelph, ON - Canada

^[3] BRF Co, Curitiba, Parana - Brazil

^[4] Fed Univ Pelotas UFPel, Pelotas, RS - Brazil

^[5] Sao Paulo State Univ Unesp, Coll Vet & Anim Sci, Botucatu, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MEAT SCIENCE; v. 148, p. 32-37, FEB 2019.
• Citações Web of Science: 0

Resumo

The objective of this study was to present heritability estimates and accuracy of genomic prediction using different methods for meat quality traits in Nelore cattle. Approximately 5000 animals with phenotypes and genotypes of 412,000 SNPs, were divided into two groups: (1) training population: animals born from 2008 to 2013 and (2) validation population: animals born in 2014. A single-trait animal model was used to estimate heritability and to adjust the phenotype. The methods of GBLUP, Improved Bayesian Lasso and Bayes C pi were performed to estimate the SNP effects. Accuracy of genomic prediction was calculated using Pearson's correlations between direct genomic values and adjusted phenotypes, divided by the square root of heritability of each trait (0.03-0.19). The accuracies varied from 0.23 to 0.73, with the lowest accuracies estimated for traits associated with fat content and the greatest accuracies observed for traits of meat color and tenderness. There were small differences in genomic prediction accuracy between methods. (AU)

• Processo FAPESP: 12/21969-7 - Utilização de informações genômicas para o melhoramento genético de características da carne em bovinos da raça Nelore
• Beneficiário: Ana Fabrícia Braga Magalhães
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 09/16118-5 - Ferramentas genômicas no melhoramento genético de características de importância econômica direta em bovinos da raça Nelore
• Beneficiário: Lucia Galvão de Albuquerque
• Modalidade de apoio: Auxílio à Pesquisa - Temático