Investigating potential causal relationships among carcass and meat quality traits using structural equation model in Nellore cattle

Autor(es)

Bresolin, Tiago ; Passafaro, Tiago Luciano ; Braz, Camila Urbano ; Carvalho Alves, Anderson Antonio ; Carvalheiro, Roberto ; Loyola Chardulo, Luiz Artur ; de Magalhaes Rosa, Guilherme Jordao ; de Albuquerque, Lucia Galvao

• Tipo de documento: Artigo Científico
• Fonte: MEAT SCIENCE; v. 187, p. 7-pg., 2022-02-25.

Resumo

The objective of this study was to investigate potential causal relationships among hot carcass weight (HCW), longissimus muscle area (LMA), backfat thickness (BF), Warner-Bratzler shear force (WBSF), and marbling score (MB) traits in Nellore cattle using structural equation models (SEM). The SEM fitted comprises the following links between traits: WBSF -> LMA, WBSF -> HCW, HCW -> LMA, BF -> HCW, and BF -> MB, where the arrows indicate the causal direction between traits, with structural coefficients posterior means (posterior standard deviation) equal to 0.29 cm2/kg (0.09), 0.43 kg/kg (0.29), 0.10 cm2/kg (0.006), 1.92 kg/mm (0.28), and 0.03 scoregrade/mm (0.006), respectively. The final SEM revealed some important putative causal relationships among the traits studied here. The implied causal effects suggest that interventions on meat tenderness and fat content would affect overall growth and muscle deposition. Knowledge regarding potential causal relationships inferred among the traits studied here can have important implications for the genetic selection and management of Nellore cattle for improvement of carcass and meat quality. (AU)

• 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
• Processo FAPESP: 16/02366-0 - Busca por estruturas causais usando modelos gráficos na raça nelore
• Beneficiário: Tiago Bresolin
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/18779-5 - Inferência causal fenotípica utilizando dados de diferentes abordagens multi-ômicas na raça Nelore
• Beneficiário: Tiago Bresolin
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado