Exercise influences fatty acids in the longissimus dorsi muscle of Sunit lambs and improves dressing percentage by affecting digestion, absorption, and lipid metabolism

Ting Liu, Taiwu Zhang, Yanni Zhang, Min Zhang, Maoqin Zhai, Weihao Wang, Chenlei Wang, Yan Duan, Ye Jin
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Abstract

The transition from grazing to captive rearing resulted in a significant decline in meat quality. To enhance the quality of meat from captive sheep, we examined the impact of exercise on Sunit lambs. The lambs, with similar body weight and aged 3 months underwent a 90-day period of thought-driven exercise. At the end of the exercise period, we collected colonic contents, epithelial tissues, and the longissimus dorsi muscle, and recorded slaughter performance. Exercise was found to have a significant impact on the content of short-chain fatty acids in the colon. Additionally, it generally reduced the mRNA expression of fatty acid absorption transporter genes in the colonic epithelium and lipid metabolism-related genes in the longissimus dorsi muscle. Furthermore, exercise significantly affected the content of fatty acids in the longissimus dorsi muscle of Sunit lambs, and increased its dressing percentage. Exercise influences the composition of fatty acids of the longissimus dorsi muscle and improves dressing percentage by affecting the digestion, absorption, and metabolism of lipids in Sunit lambs. This could be profitable for the livestock industry, and could alter the nutrition and flavor of lamb meat.
运动影响苏尼特羔羊背长肌中的脂肪酸,并通过影响消化、吸收和脂质代谢提高拌料率
从放牧到圈养的转变导致肉质显著下降。为了提高圈养羊的肉质,我们研究了运动对苏尼特羔羊的影响。体重相近、年龄为 3 个月的羔羊接受了为期 90 天的思想驱动运动。运动结束后,我们收集了结肠内容物、上皮组织和背阔肌,并记录了屠宰表现。研究发现,运动对结肠中的短链脂肪酸含量有显著影响。此外,运动普遍降低了结肠上皮脂肪酸吸收转运体基因和背阔肌脂质代谢相关基因的 mRNA 表达。此外,运动明显影响苏尼特羔羊背长肌中脂肪酸的含量,并增加其敷料比例。运动通过影响苏尼特羔羊对脂类的消化、吸收和新陈代谢,影响背长肌脂肪酸的组成,并提高拌料率。这可能为畜牧业带来利润,并能改变羔羊肉的营养和风味。
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