Effects of prolonged photoperiod on growth performance, serum lipids and meat quality of Jinjiang cattle in winter

Objective: This study was conducted to investigate the potential effects of prolonged photoperiod on the serum lipids, carcass traits, and meat quality of Jinjiang cattle during winter.Methods: Thirty-four Jinjiang bulls aged between 14 and 16 months were randomly assigned to two groups that were al...

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Bibliographic Details
Published in:Animal bioscience 2021, 34(9), , pp.1569-1578
Main Authors: Yu, Yan, Qiu, Jingyun, Cao, Jincheng, Guo, Yingying, Bai, Hui, Wei, Shengjuan, Yan, Peishi
Format: Article
Language:English
Subjects:
Cattle
Environmental aspects
gene expression
jinjiang cattle
meat quality
photoperiod
Photoperiodism
Physiological aspects
serum lipids
Winter
축산학
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Summary:Objective: This study was conducted to investigate the potential effects of prolonged photoperiod on the serum lipids, carcass traits, and meat quality of Jinjiang cattle during winter.Methods: Thirty-four Jinjiang bulls aged between 14 and 16 months were randomly assigned to two groups that were alternatively subjected to either natural daylight +4 h supplemental light (long photoperiod, LP) or natural daylight (natural photoperiod, NP) for 96 days. The potential effects on the levels of serum lipids, carcass traits, meat quality, and genes regulating lipid metabolism in the intramuscular fat (IMF) of the cattle were evaluated.Results: Jinjiang cattle kept under LP showed significant increase in both dry matter intake and backfat thickness. the serum glucose and the plasma leptin levels were significantly reduced, while that of melatonin and insulin were observed to be increased. The crude fat contents of biceps femoris muscle and longissimus dorsi muscle were higher in LP than in NP group. In longissimus dorsi muscle, the proportions of C17:0 and C18:0 were significantly higher but that of the C16:1 was found to be significantly lower in LP group. The relative mRNA expressions in IMF of longissimus dorsi muscle, the lipid synthesis genes (proliferatoractivated receptor gamma, fatty acid-binding protein) and the fatty acid synthesis genes (acetyl-coa carboxylase, fatty acid synthetase, 1-acylglycerol-3-phosphate acyltransferase) were significantly up-regulated in LP group (p
ISSN:2765-0189
2765-0235
2765-0235
DOI:10.5713/ab.20.0750