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Provedor de dados:  R. Bras. Zootec.
País:  Brazil
Título:  Association of polymorphisms in the leptin and thyroglobulin genes with meat quality and carcass traits in beef cattle
Autores:  Carvalho,Thiago Dutra de
Torres Júnior,Roberto Augusto de Almeida
Medeiros,Sérgio Raposo de
Feijó,Gelson Luís Dias
Souza Junior,Maury Dorta de
Blecha,Isabella Maiumi Zaidan
Soares,Cleber Oliveira
Data:  2012-10-01
Ano:  2012
Palavras-chave:  Fat thickness
Marker-assisted selection
Meat tenderness
Shear force
Resumo:  The objective of the present study was to estimate the allelic and genotypic frequencies of the polymorphisms E2FB (AY138588.1: c.305C> T), located in the leptin gene (LEP), and TG5 (X05380.1:g.-422C>T), located in the thyroglobulin gene (TG), and evaluate the association of these polymorphisms in crossbred cattle of seven distinct genetic groups with the following traits: slaughter weight (SW), hot carcass weight (HCW), hot carcass yield (HCY), carcass fat thickness (CFT), ribeye area (REA), marbling (MARM) and shear force (SF). The animals were genotyped using the PCR-RFLP (Polymorphism Chain Reaction-Restriction Fragment Length Polymorphism) technique, using 201 products obtained from F1 Caracu × Nellore, Angus × Nellore and Valdostana × Nellore cows, mated to Canchim, Caracu and Red Angus bulls (only Caracu × Nellore cows were used with Red Angus bulls). The allelic and genotypic frequencies were compared using the Chi-squared test. Associations between the genotype of each polymorphism and the traits were analyzed using the General Linear Model (GLM) of statistical software SAS. The least squares means of genotypes of the polymorphisms were compared using Student's t test. The E2FB polymorphism in the LEP gene was associated with CFT, showing the potential for use in national programs for genetic improvement of beef cattle, through the inclusion of SNP in genotyping commercial tests. The TG5 polymorphism in the TG gene was not associated with any of the evaluated traits and was considered ineffective for selection of beef cattle in Brazilian herds.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Sociedade Brasileira de Zootecnia
Relação:  10.1590/S1516-35982012001000004
Formato:  text/html
Fonte:  Revista Brasileira de Zootecnia v.41 n.10 2012
Direitos:  info:eu-repo/semantics/openAccess

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