Título:	Genetic analysis of residual feed intake adjusted for fat and carcass and performance traits in a Nellore herd.
Autoria:	MORAES, G. F. de ABREU, L. R. A. FERREIRA, I. C. PEREIRA, I. G.
Afiliação:	GIOVANNA FARIA DE MORAES, UNIVERSIDADE FEDERAL DE UBERLÂNDIA LUIZA RODRIGUES ALVES ABREU, UNIVERSIDADE FEDERAL DE MINAS GERAIS ISABEL CRISTINA FERREIRA, CPAC IDALMO GARCIA PEREIRA, UNIVERSIDADE FEDERAL DE MINAS GERAIS.
Ano de publicação:	2017
Referência:	Ciência Rural, v. 47, n. 2, e20151505, 2017.
Páginas:	7 p.
Conteúdo:	Abstract: The study of the genetic evaluation of residual feed intake adjusted for fat (RFIFat) is important for the appropriate use of feed efficiency in selection programs. The objective was to analyze the influence of selection for RFIF at on carcass and performance traits by estimating various genetic parameters. Data were analyzed from five tests of feed efficiency, which were conducted with 677 Nellore males. Genetic evaluation was performed by Bayesian inference using an animal model via single- and two-trait analyses. Variables analyzed were dry matter intake, average daily gain, RFIFat, rib eye area, back fat thickness, rump fat thickness, marbling score, and subcutaneous fat thickness. The posterior mean distributions estimated at each analysis were used to estimate heritability of the traits and to perform various correlations. The studied traits showed high heritability estimates, and they should respond well to selection. The RFIFat presented a phenotypic correlation with carcass traits (which was next to zero), and there was also a negative genetic correlation. Additive genetic variability for RFIFat showed that selection for this trait can promote genetic gains in future generations, resulting in animals that are efficient in terms of nutrient use, and according to the genetic and phenotypic correlations, with no significant negative changes to carcass traits.
Thesagro:	Bovino Gordura Animal Carcaça Seleção Genética Ganho de Peso
NAL Thesaurus:	Cattle Fat thickness Genetic correlation Heritability Weight gain
Palavras-chave:	Espessura de gordura Eficiência alimentar Correlação genética Herdabilidade
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPAC)