Desempenho, características de carcaça e expressão de genes em tourinhos alimentados com lipídeos e monensina

• Autor(a) principal: Ladeira, Márcio Machado
• Data de Publicação: 2014
• Outros Autores: Machado Neto, Otávio Rodrigues, Santarosa, Leonardo de Castro, Chizzotti, Mário Luiz, Oliveira, Dalton Mendes de, Carvalho, José Rodolfo Reis de, Alves, Maria Cecília Lemes
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://repositorio.ufla.br/jspui/handle/1/45570
• topic: Bovinocultura de corte; Gordura protegida; Ionóforos; Peroxisome Proliferator Activated Receptor Alpha (PPARA); Soja; Sterol Regulatory Element‑Binding Proteins (SREBP1c); Beef cattle; Rumen-protected fat; Ionophores; Soybean

The objective of this work was to evaluate performance, carcass traits, and their correlation with gene expression in young bulls. Forty Red Norte animals were feedlot and distributed in a completely randomized design, using a 2x2 factorial arrangement, and fed ground soybean grains or rumen-protected fat, with or without monensin supplementation. Diets were formulated to be isonitrogenous, with similar ether extract contents (6.5%), and had corn silage as roughage (40%). The experimental period lasted 84 days, preceded by 14 days of adaptation. The expressions of the PPARA, SREBP1c and SCD1 genes were evaluated. Animals fed rumen-protected fat had greater average daily gain in the first 56 days of feedlot. Monensin did not affect the daily gain, but increased carcass weight. There was -0.40 correlation between animal daily gain and SCD1 expression. The use of rumen-protected fat increases animal performance at the beginning of feedlot, and monensin provides greater carcass weight.