Long-term intake of raw potato starch decreases back fat thickness and dressing percentage but has no effect on the longissimus muscle quality of growing-finishing pigs
Long-term intake of raw potato starch decreases back fat thickness and dressing percentage but has no effect on the longissimus muscle quality of growing-finishing pigs
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DOI：
10.1016/j.livsci.2014.10.004
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发表时间：
2014-12-01
影响因子：
1.8
通讯作者：
Zhu, W.
中科院分区：
文献类型：
--
作者：
Fang, L.;Jiang, X.;Zhu, W.
本试验旨在研究长期摄入马铃薯生淀粉（RPS）对生长育肥猪胴体品质、肠内短链脂肪酸（SCFA）浓度、肝脏脂肪代谢相关宿主基因表达、SCFA摄取、SCFA信号传导和结肠黏膜饱腹感调节的影响。试验选用36头70日龄、23.78±1.87 kg的杜×长×大白生长母猪，随机分为玉米淀粉（CS）组和马铃薯淀粉（RPS）组，每组6个重复（栏），每个栏3头猪。CS组饲喂玉米-大豆为基础的饲粮，RPS组饲粮用纯化的RPS代替230 g/kg（生长）或280 g/kg（育肥）的纯化玉米淀粉。试验为期100天。结果表明，长期摄入RPS显著提高了猪的采食量，但对猪的体重、平均日增重和料重比没有影响。饲粮中添加RPS显著提高了猪胃和大肠重量及其占体重的比例、盲肠和结肠粘膜厚度以及结肠中短链脂肪酸浓度。长期摄入RPS可降低生长肥育猪背部脂肪厚度和屠宰率，但对最长肌质量无影响。与CS饲粮相比，RPS饲粮显著上调了结肠黏膜MCT1、FFAR2和FFAR3基因的表达。食用RPS显著下调猪肝脏CPT1a和PPAR α基因的表达，上调SREBP1c基因的表达。结果表明，RPS可调节猪肠道SCFA浓度和宿主基因表达，从而改变猪的脂肪组织模式。(C) 2014 Elsevier B.V.版权所有
This study was conducted to investigate the effects of long-term intake of raw potato starch (RPS) on carcass quality, luminal short chain fatty acid (SCFA) concentrations, the expression of host genes involved in fat metabolism in the liver, SCFA uptake, SCFA signaling and satiety regulation in the colonic mucosa of growing-finishing pigs. Thirty-six Duroc x Landrace x Large White growing barrows (70 days of age, 23.78 +/- 1.87 kg) were randomly allocated to corn starch (CS) and raw potato starch (RPS) groups, each group consisting of six replicates (pen) with three pigs per pen. Pigs in the CS group were offered a corn-soybean based diet, while pigs in the RPS group were put on a diet in which 230 g/kg (growing) or 280 g/kg (finishing) purified corn starch was replaced with purified RPS during a 100-day trial. Results showed that long-term intake of RPS significantly increased the feed intake of the pigs, but had no effect on body weight, average daily gain or feed:gain ratio. Consumption of RPS significantly increased the weight of the stomach and large intestine and their percentage of body weight, the mucosa thickness of the cecum and colon, and SCFA concentrations in the colon of pigs. Long-term intake of RPS decreased back fat thickness and dressing percentage but had no effect on the longissimus muscle quality of growing-finishing pigs. The expression of genes MCT1, FFAR2 and FFAR3 in the colonic mucosa was significantly up-regulated in pigs fed with the RPS diet as compared to pigs fed with the CS diet. Consuming RPS significantly down-regulated the expression of genes CPT1a and PPAR alpha, and up-regulated the expression of the SREBP1c gene in the livers of pigs. The results suggest that RPS modulates gut SCFA concentrations and the expression of host genes, which can change the adipose tissue patterning in pigs. (C) 2014 Elsevier B.V. All rights reserved.