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MyoD1 expression levels affect meat tenderness in Nellore beef cattle

Friday, August 22, 2014
Posters (The Westin Bayshore)
Polyana C. Tizioto , Federal University of São Carlos, São Carlos, Brazil
Gustavo Gasparin , University of São Paulo/ESALQ, Piracicaba, Brazil
Luiz L. Coutinho , Universidade de São Paulo/Esalq, Piracicaba, Brazil
Gerson B Mourao , Department of Animal Science, University of São Paulo/ESALQ, Piracicaba, Brazil
Maurício A. Mudadu , Embrapa Pecuária Sudeste, São Carlos, Brazil
Marcela M. Souza , Federal University of São Carlos, São Carlos, Brazil
Wilson Malagó Jr , Embrapa Southeast Livestock, SAO CARLOS, Brazil
Flavia A Donatoni Bressani , Embrapa Southeast Livestock, Sao Carlos, Brazil
Rymer R Tullio , Embrapa Southeast Livestock, Sao Carlos, Brazil
Renata T Nassu , Embrapa Southeast Livestock, Sao Carlos, Brazil
Luciana C. A. Regitano , Embrapa Pecuária Sudeste, São Carlos, Brazil
Abstract Text:

The MyoD1 gene play a key role in skeletal muscle differentiation through the regulation of muscle-specific genes expression. In this work, we have shown that MyoD1 gene expression can influence the Warner – Bratzler shear force (WBSF) measured on the Longissiums dorsi muscle after 7 and 14 days of meat aging in half-sib families of Nelore breed.. Lower MyoD1 expression levels were related to lower WBSF measures. The effect of MyoD1 gene expression on meat tenderness may emerge from its function as transcription factor of genes responsible for muscle development, composition and phenotype. Further analysis identifying the mechanisms which control the MyoD1 expression would be useful to elucidate the effect observed in this study.

Keywords: Bos indicus, qPCR, Shear force, Gene expression

See more of: Posters: Genetics of Trait Complexes: Growth and Development (Group 2)
See more of: Genetics of Trait Complexes: Growth and development
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