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| Comparison of Fatty Acid Composition in Fat and Muscle Tissues from Different Carcass Parts of Mongolian Spotted Horses |
| TANGESI, LIU Yu, WANG Wenxing, HUANG Boguang, ZHANG Xinzhuang, MANGLAI |
| 1.Equine Research Center, Inner Mongolia Agricultural University, Scientific Observing and Experimental Station of Equine Genetics, Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Inner Mongolia Key Laboratory of Equine Genetics, Breeding and Reproduction, College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China; 2. Inner Mongolia Key Laboratory of Animal Nutrition and Feed Science, Hohhot 010018, China; 3.Inner Mongolia Zhongyun Horse Industry Co., Xilinhot 026000, China |
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Abstract The present study investigated the fatty acid compositions of fat and muscle tissues in different carcass parts of Mongolian spotted horses. Three adult Mongolian spotted horses were slaughtered to collect perirenal, perienteric and subcutaneous fat tissues as well as shoulder, Longissimus dorsi and gluteal muscles for analysis of fatty acid composition by gas chromatography. In total, 19 fatty acids were detected in each of the three fat tissues, saturated fatty acids (SFA) and unsaturated fatty acids (UFA) accounting for 34%–37% and more than 60% of the total amount of fatty acids; of the latter, 47% to 48% were monounsaturated fatty acid (MUFA) and 26% to 27% polyunsaturated fatty acid (PUFA). The contents of C10:0, C18:0 and C20:0 in subcutaneous fat was significantly lower than in perirenal and perienteric fat (P < 0.05). The degree of MUFA deposition in subcutaneous fat was greater than in the other two fat tissues but with no statistical significance (P > 0.05). C18:3 n-3 was the most abundant PUFA, which did not significantly vary among the different fat tissues (P > 0.05). Fifteen fatty acids were detected in each of the three muscles, SFA, MUFA and PUFA accounting for 38% to 40%, 35% to 40%, and 15% to 20% of the total amount of fatty acids respectively. The content of C12:0 in Longissimus dorsi and gluteal muscles was significantly higher than that in shoulder muscle (P < 0.05), whereas the other SFAs did not significantly differ among muscles (P > 0.05). The MUFA significantly more abundant in Longissimus dorsi than in the other muscles was C16:1 (P < 0.05). n-6 / n-3 PUFA ratio in shoulder muscle was significantly higher than that in Longissimus dorsi and gluteal muscles (P < 0.05). The contents of C18:3 n-3 and total PUFA in subcutaneous fat were significantly higher than in Longissimus dorsi muscle (P < 0.05). In conclusion, fatty acid compositions in the fat and muscle tissues of Mongolian spotted horses have their own unique characteristics, but they are all rich in UFA.
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2020, Vol. 34 
