Genetic evaluation for latent variables derived from factor analysis in broilers

Autor(es):Mostrar menos -

Paiva, J. T. ^[1] ; Oliveira, H. R. ^[2] ; Nascimento, M. ^[3] ; Nascimento, A. C. C. ^[3] ; Silva, H. T. ^[1] ; Henriques, R. F. ^[4] ; Lopes, P. S. ^[1] ; Silva, F. F. ^[1] ; Veroneze, R. ^[1] ; Ferraz, J. B. S. ^[5] ; Eler, J. P. ^[5] ; Mattos, E. C. ^[5] ; Gaya, L. G. ^[6]

Afiliação do(s) autor(es)

^[1] Univ Fed Vicosa, Dept Anim Sci, Vicosa, MG - Brazil

^[2] Purdue Univ, Dept Anim Sci, W Lafayette, IN 47907 - USA

^[3] Univ Fed Vicosa, Dept Stat, Vicosa, MG - Brazil

^[4] Univ Fed Mato Grosso do Sul, Dept Anim Sci, Campo Grande - Brazil

^[5] Univ Sao Paulo, FZEA, Dept Vet Med, Pirassununga - Brazil

^[6] Univ Fed Sao Joao Del Rei, Dept Anim Sci, Sao Joao Del Rei - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BRITISH POULTRY SCIENCE; v. 61, n. 1 NOV 2019.
• Citações Web of Science: 0

Resumo

1. The aim of this study was to investigate the associations between several carcass, performance and meat quality traits in broilers through factor analysis and use the latent variables (i.e. factors) as pseudo-phenotypes in genetic evaluations. 2. Factors were extracted using the principal components method and varimax rotation algorithm. Genetic parameters were estimated via Bayesian inference under a multiple-trait animal model. 3. All factors taken together explained 71% of the original variance of the data. The first factor, denominated as `weight', was associated with carcass and body weight traits; and the second factor, defined as `tenderness', represented traits related to water-holding capacity and shear force. The third factor, `colour', was associated with traits related to meat colour, whereas the fourth, referenced as `viscera', was related to heart, liver and abdominal fat. 4. The four biological factors presented moderate to high heritability (ranging from 0.35 to 0.75), which may confer genetic gains in this population. 5. In conclusion, it seems possible to reduce the number of traits in the genetic evaluation of broilers using latent variables derived from factor analysis. (AU)

• Processo FAPESP: 02/04172-6 - Estudo genetico da deposicao de gordura intra-abdominal e de caracteristicas de carcaca em linhagem macho de selecao de frangos de corte.
• Beneficiário: Leila de Genova Gaya
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 03/11536-7 - Estudo genetico da qualidade de carne em linhagem macho de selecao de frangos de corte.
• Beneficiário: Leila de Genova Gaya
• Modalidade de apoio: Bolsas no Brasil - Doutorado