Data/hora: 20/06/2024 06:52:21

Biblioteca(s): | Embrapa Gado de Corte; Embrapa Pantanal.
Data corrente: | 04/01/2023
Data da última atualização: | 04/01/2023
Autoria: | ARAÚJO, T. L. A. C. de; FEIJO, G. L. D.; NEVES, A. P.; NOGUEIRA, E.; OLIVEIRA, L. O. F. de; GOMES, M. de N. B.; EGITO, A. A. do; FERRAZ, A. L. J.; MENEZES, G. R. de O.; LATTA, K. I.; FERREIRA, J. R.; VIEIRA, D. G.; PEREIRA, E. S.; GOMES, R. da C.
Afiliação: | THIAGO LUÍS ALVES CAMPOS DE ARAÚJO, UNIVERSIDADE FEDERAL DO CEARÁ; GELSON LUIS DIAS FEIJO, CNPGC; ANDREI PEREIRA NEVES, UNIVERSIDADE ESTADUAL DE LONDRINA; ERIKLIS NOGUEIRA, CPAP; LUIZ ORCIRIO FIALHO DE OLIVEIRA, CNPGC; MARINA DE NADAI BONIN GOMES, UNIVERSIDADE FEDERAL DE MATO GROSSO DO SUL; ANDREA ALVES DO EGITO, CNPGC; ANDRÉ LUIZ JULIEN FERRAZ, UNIVERSIDADE ESTADUAL DE MATO GROSSO DO SUL; GILBERTO ROMEIRO DE OLIVEIRA MENEZE, CNPGC; KARLA IZIDIO LATTA, UNIVERSIDADE ESTADUAL DE LONDRINA; JAQUELINE RODRIGUES FERREIRA, UNIVERSIDADE ESTADUAL DE LONDRINA; DOUGLAS GOMES VIEIRA, UNIVERSIDADE ESTADUAL DE LONDRINA; ELZANIA SALES PEREIRA, UNIVERSIDADE FEDERAL DO CEARÁ; RODRIGO DA COSTA GOMES, CNPGC.
Título: | Effect of genetic merit for backfat thickness and paternal breed on performance, carcass traits, and gene expression in subcutaneous adipose tissue of feedlot-finished steers.
Ano de publicação: | 2022
Fonte/Imprenta: | Livestock Science, v. 263, article 104998, 2022.
ISSN: | 1871-1413
DOI: | https://doi.org/10.1016/j.livsci.2022.104998
Idioma: | Inglês
Conteúdo: | This study evaluated selection for backfat thickness based on genetic merit (GMB) in Nellore (N) and crossbred (½ Aberdeen Angus + ½ Nellore, AN) steers, as well as the effects of this selection on animal performance, carcass traits, and gene expression in subcutaneous adipose tissue (SAT). The animals were obtained by mating Nellore cows with Nellore or Aberdeen Angus bulls. Both paternal genetic groups were selected to have positive (+, high GMB) or negative (-, low GMB) expected progeny differences for backfat thickness. Seventy-six animals (14 N+, 20 N-, 20 AN+, and 22 AN-) were reared on pasture and finished in the feedlot. The animals were slaughtered, and SAT samples were collected to investigate the relative expression of the acetyl-CoA carboxylase alpha (ACACA), adiponectin, C1Q and collagen domain containing (ADIPOQ), fatty acid synthase (FASN), perilipin 1 (PLIN1), peroxisome proliferator activated receptor gamma (PPARG), and sterol regulatory element binding protein (SREBF1) genes. Carcass weight and yield, conformation, finishing score, fat distribution score, and measurements of backfat thickness and rib eye area were evaluated. There was no effect of GMB on performance or on the relative expression of the genes studied. High GMB steers had greater backfat thickness and higher finishing, conformation and fat distribution scores in the carcass than low GMB animals. The use of high GMB animals provides better carcass finishing without affecting performance. The greater fat deposition in carcasses of high GMB animals is not associated with the relative expression of the genes studied.
Thesagro: | Carcaça; Cruzamento Animal; Gado Nelore; Gene; Reprodução Animal.
Thesaurus Nal: | Backfat; Breeding value; Crossing; Nellore; Steers; Tissues.

Categoria do assunto:

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L Ciência Animal e Produtos de Origem Animal

Registro original: | Embrapa Gado de Corte (CNPGC)

Exemplares:

CNPGC - (17861-1) - UPC - AP - DD -  -  -  - DIS
CPAP - (60866-1) - UPC - AP - DD - 2022 -  - 2022 - DIS