Blood and Intramuscular Fatty Acid Composition of Angus and Simmental Cows in Alpine Grassland
LI Xinmiao, WANG Yuanyuan, Heshuote MAILISI, BAI Yuting, BAOYINDUGURONG·Jinhua, HUGEJILETU, AORIGELE, HOU Ronglun, XUE Qiang
1.College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China; 2.Inner Mongolia Key Laboratory of Biomanufacturing, Hohhot 010018, China; 3.The Fu Foundation School of Engineering and Applied Science, Columbia University, New York 10027, USA; 4.College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010018, China; 5.Inner Mongolia Hesige Green Industry Import and Export Co. Ltd., Xilinguole 026000, China
Abstract：Blood samples from 37 randomly selected Angus and Simmental cows at the age of 48 months each and Longissimus dorsi muscle samples from 5 cows each breed were collected for this study. After pretreatment and methyl esterification, the composition of fatty acids in blood and muscle was investigated by gas chromatography-mass spectrometry (GC-MS). The results showed that 36 fatty acids were detected in blood of each breed and also in intramuscular fat. All samples had high contents (up to more than 51%) of saturated fatty acids (SFA), which were mainly composed of palmitic acid and stearic acid, accounting for 92% and 89% of the total SFA in blood and intramuscular fat, respectively. In addition, oleic acid was the most predominant unsaturated fatty acid (UFA), followed by linoleic acid; the former accounted for about 87% of the total monounsaturated fatty acids in blood and intramuscular fat, respectively. The major UFAs showed significant differences in blood but not in intramuscular fat. Furthermore, n-6/n-3 PUFA ratio in blood and intramuscular fat were within the United Nations Food Agriculture Organization (FAO) recommended range (5–10), and blood P/S ratio was higher than the World Health Organization (WHO) recommended standard (≥ 0.4). This study concluded that the composition of blood and intramuscular fatty acids was similar between pure Angus and Simmental cows raised in alpine pasture and UFA composition accorded with the ideal pattern recommended by the FAO and WHO, suggesting high nutritional value.
2021, Vol. 35 
