Título:	Performance, methane production, and beef lipid profile of young bulls finished in feedlot.
Autoria:	RODRIGUES, B. M. ALVARENGA, R. C. LANNA, D. P. D. BERNDT, A. SOUZA, F. A. de LOPES, L. S.
Afiliação:	BARBARA MARTINS RODRIGUES, UNIVERSIDADE FEDERAL DE MINAS GERAIS; RAMON COSTA ALVARENGA, CNPMS; DANTE PAZZANESE DUARTE LANNA, UNIVERSIDADE DE SÃO PAULO; ALEXANDRE BERNDT, CPPSE; FERNANDO ANTÔNIO DE SOUZA, UNIVERSIDADE FEDERAL DE MINAS GERAIS; LEANDRO SÂMIA LOPES, UNIVERSIDADE FEDERAL DE MINAS GERAIS.
Ano de publicação:	2024
Referência:	Pesquisa Agropecuária Brasileira, v. 59, e03546, 2024.
Conteúdo:	The objective of this work was to evaluate the growth performance, enteric methane production, carcass traits, and fatty acid profile of the Longissimus thoracis muscle of young Nellore and Angus x Nellore beef bulls fed with a high-lipid diet and finished in feedlot. Fifty young bulls were evaluated, being divided into two groups: Nellore (n=25) and Angus × Nellore (n=25), randomly assigned to four pens in a completely randomized design. The feedlot phase covered 105 days of feed. The diet (80% concentrate) was formulated to meet or exceed beef cattle requirements to reach an average daily gain of 1.6 kg per day. The crossbred animals showed a higher dry matter intake, feed efficiency, initial body weight, final body weight, average daily gain, average daily carcass gain, hot carcass weight, and percentage of rib. However, dressing percentage was similar for both groups. The Nellore animals produced more enteric methane, expressed in g kg-1 average daily gain), but, also, higher concentrations of polyunsaturated fatty acids and conjugated linoleic acid. The two genetic groups show satisfactory growth rates, but the crossbred animals present a better growth performance and produce less methane per unit of beef. The animal’s genetic composition modifies its fatty acid profile.
Thesagro:	Bovino Gado de Corte Cruzamento Animal Carne Qualidade Metano Ácido Graxo
NAL Thesaurus:	Animal performance Beef cattle Meat quality Polyunsaturated fatty acids
Palavras-chave:	Crossbreeding Methane emission
Digital Object Identifier:	https://doi.org/10.1590/S1678-3921.pab2024.v59.03546
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPMS)