Frequencies of candidate genes and associations with carcass and meat traits in Nellore and crossbred cattle

• Autor(a) principal: Dias, Victor Augusto Domingos
• Data de Publicação: 2016
• Outros Autores: Curi, Rogério Abdallah, Pereira, Guilherme Luis, Malheiros, Jéssica Moraes, Espigolan, Rafael, Albuquerque, Lúcia Galvão de, Chardulo, Luis Artur Loyola, Oliveira, Henrique Nunes de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Pesquisa Agropecuária Brasileira (Online)
• Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/22663
• topic: Bos indicus; beef cattle; beef quality; polymorphism; Bos indicus; bovinos de corte; qualidade da carne; polimorfismo

The objective of this work was to estimate allelic frequencies of the polymorphisms IGF2/MboII (G > T) of the insulin‑like growth factor 2 (IGF2) gene, DQ499531.1:g.134A > T of the pro‑melanin‑concentrating hormone (PMCH) gene, and DQ667048.1:g.3290G > T of the RAR‑related orphan receptor C (RORC) gene in beef cattle of different genetic groups, and to evaluate the associations between these polymorphisms and traits related to carcass composition and meat quality. Data on carcass and meat quality of 499 animals was used: of 313 Nellore (Bos indicus) and of 186 Nellore crossed with different taurine (Bos taurus) breeds. For the IGF2/MboII polymorphism, the frequencies found for the G allele were 0.231 and 0.631 for Nellore and crossed breeds, respectively. For the DQ499531.1:g.134A > T polymorphism, the allelic frequencies of A were 0.850 for Nellore and 0.905 for crossed breeds. For the DQ667048.1:g.3290G > T polymorphism, the allelic frequencies of G were 0.797 and 0.460 for Nellore and crossed breeds, respectively. The evaluated single nucleotide polymorphisms (SNPs) are not significantly associated with carcass and meat traits (rib eye area, back fat thickness, shear force, total lipids, and myofibrillar fragmentation index), suggesting little utility of the analyzed polymorphisms of the IGF2, PMHC, and RORC  genes as selection markers in the studied cattle populations.