Consequences of divergent selection for residual feed intake in pigs on muscle energy metabolism and meat quality
Consequences of divergent selection for residual feed intake in pigs on muscle energy metabolism and meat quality
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DOI：
10.1016/j.meatsci.2012.07.006
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发表时间：
2013-01-01
期刊：
影响因子：
7.1
通讯作者：
Lebret, B.
中科院分区：
文献类型：
--
作者：
Faure, J.;Lefaucheur, L.;Lebret, B.
选择减少剩余采食量 (RFI) 是提高生长猪饲料效率的相关方法。然而，RFI 标准与身体成分和肌肉特征相关。目前的研究通过 AMP 激活的蛋白激酶途径评估了对 RFI 不同选择对肌肉代谢和稳态的适应性反应。在 RFI 上进行六代发散选择后，还分析了两个大白猪品系对技术和感官肉品质的影响。RFI-猪（n = 60）表现出相似的生长速度，但采食量和转化率较低，并且比 RFI + 猪（n = 57）更瘦。尽管糖原含量较高，但 RFI 猪的最长肌中参与糖酵解、脂肪酸氧化途径和能量平衡的代谢酶能力降低。 RFI 线中肌肉稳态的降低影响了死后代谢并损害了腰肉和火腿的技术质量特征，但对肉食质量仅产生轻微影响。 (C) 2012 Elsevier Ltd. 保留所有权利。
Selection to decrease Residual Feed Intake (RFI) is a relevant way to improve feed efficiency in growing pigs. However, RFI criterion is correlated with body composition and muscle characteristics. Present study evaluated adaptive responses to divergent selection on RFI on muscle metabolism and homeostasis through AMP-activated protein kinase pathway. Consequences on technological and sensory meat quality were also analyzed in two lines of Large White pigs after six generations of divergent selection on RFI.RFI- pigs (n=60) exhibited similar growth rate but lower feed intake and conversion ratio, and were leaner than RFI+ pigs (n=57). Despite higher glycogen content, metabolic enzyme capacities involved in glycolytic, fatty acid oxidation pathway and energy balance were reduced in the Longissimus muscle of the RFI- pigs. Reduced muscle homeostasis in the RFI- line influenced post-mortem metabolism and impaired technological quality traits of loin and ham but had only slight effects on meat eating quality. (C) 2012 Elsevier Ltd. All rights reserved.