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Effect of high energy intake on carcass composition and hypothalamic gene expression in Bos indicus heifers R. Bras. Zootec.
Diniz-Magalhães,Juliane; Mesquita,Lígia Garcia; Carvalho,Marina Vieira de; Machado,Anna Beatriz Escarpellin; Pimentel,José Rodrigo Valim; Prada e Silva,Luis Felipe.
ABSTRACT The objective of this study was to evaluate the effect of high or low energy intake on carcass composition and expression of hypothalamic genes related to the onset of puberty. Twenty-four prepubertal Nellore heifers, 18-20- months-old, with 275.3±18.0 kg body weight (BW), and 4.9±0.2 (1-9 scale) body condition score (BCS) were randomly assigned to two treatments: high-energy diet (HE) and low-energy diet (LE). Heifers were housed in two collective pens and fed diets formulated to promote average daily gain of 0.4 (LE) or 1.2 kg (HE) BW/day. Eight heifers from each treatment were slaughtered after the first corpus luteum detection - considered as age of puberty. The 9-10-11th rib section was taken and prepared for carcass composition analyses....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cattle; Energy supplementation; Neuropeptides; Puberty; Reproduction.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000800664
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