Data/hora: 02/06/2024 02:40:37

Provedor de dados: | Revista Brasileira de Zootecnia
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; Siqueira,Fabiane; 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; SNP.
Resumo: | The objective of the present study was to estimate the allelic and genotypic frequencies of the polymorphisms E2FB (AY138588.1: c.305C&gt; T), located in the leptin gene (LEP), and TG5 (X05380.1:g.-422C&gt;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
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001000004
Editor: | Sociedade Brasileira de Zootecnia
Relação: | 10.1590/S1516-35982012001000004
Formato: | text/html
Fonte: | Revista Brasileira de Zootecnia  v.41 n.10 2012
Fonte: | info:eu-repo/semantics/openAccess