Divergent temperaments are associated with beef tenderness and the inhibitory activity of calpastatin

Autor(es)

da Silva Coutinho, Marcelo Aranda ^[1] ; Ramos, Patricia Maloso ^[1] ; da Luz e Silva, Saulo ^[2] ; Martello, Luciane Silva ^[2] ; Cravo Pereira, Angelica Simone ^[3] ; Delgado, Eduardo Francisquine ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Programa Posgrad Ciencia Anim & Pastagens, Dept Zootecnia, Escola Super Agr Luiz de Queiroz, Av Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil

^[2] Univ Sao Paulo, Fac Zootecnia & Engn Alimentos, BR-13635900 Pirassununga, SP - Brazil

^[3] Univ Sao Paulo, Fac Med Vet & Zootecnia, BR-13635900 Pirassununga, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MEAT SCIENCE; v. 134, p. 61-67, DEC 2017.
• Citações Web of Science: 6

Resumo

Ninety-six feedlot-finished Nellore steers were used to verify the relationship between temperament indicators and meat tenderization. Temperament index (TI), chute score (CS), and average of exit velocity (EV) with CS (AT) presented low positive correlations (P <= 0.05) with shear force, either at 2 or 16 days postmortem (WBSF-16). The rectal temperature was consistently correlated with temperament indicators (TI, CS, and AT) and WBSF-16. Two groups (n = 12) representing the most tender (39.2 +/- 4.9 N) and most tough meat (94.1 +/- 11.8 N), based on WBSF-16, were compared for temperament, and calpastatin activity (CASTa) was determined 48 h postmortem. The tender group presented lower EV, TI, and AT (P <= 0.05). The tender group exhibited lower (P <= 0.05) CASTa in the triceps brachii muscle, but there was no difference in CASTa in the longissimus lumborum muscle between WBSF groups. Meat tenderness and inhibitory activity of calpastatin may be associated with divergent temperament indices in zebu cattle. (AU)

• Processo FAPESP: 12/50788-0 - Carne bovina e saúde: uma abordagem holística do perfil de ácidos graxos
• Beneficiário: Angélica Simone Cravo Pereira
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/24602-2 - A atividade relativa das isoformas de calpastatina determinam o processo de amaciamento da carne bovina proveniente de animais com grande participação Bos indicus
• Beneficiário: Eduardo Francisquine Delgado
• Modalidade de apoio: Auxílio à Pesquisa - Regular