摘要
[ Objective] The study aimed to provide a theoretical basis for rational utilization of Datong yak resource. [ Method] By qualitative and quantitative determination with gas chromatograph, the composition and content of intermuscular fatty acid of Datong yak were compared with those of Datong yellow cattle. [ Result] Comparing with Datong yellow cattle, Datong yak had lower saturated fatty acid （SFA） content and higher polyunsaturated fatty acid （PUFA） content at extremely significant level （P 〈0.01 ）, while the difference of monounsaturated fatty acid （MUFA） contents between them was not significant （P〉0.05）. The PUFA/SFA and n-6/n-3 PUFA of Datong yak were in accordance with the recommended proportions. [ Conclusion] The intermuscular fatty acid composition of Datong yak is superior to that of local yellow cattle, which indicates that Datong yak meat has high nutritive value and wide development prospect.
1材料与方法1．1材料①供试动物。大通牦牛和大通黄牛。二者分布地区及其生态条件见表1。②试剂及药品。氯仿，氢氧化钾，氯化钠，硫酸氢钠，甲醇（以上试剂均为分析纯），正己烷（色谱纯），有机相过滤膜（0．5μm），高纯氮气（99％）等。21种常规脂肪酸甲酯（FAME）标准品为：C6：0、C8：0、C10：0、C12：0、C13：0、C14：0、C15：0、C16：0、C16：1、C17：0、C18：0、C18：1、C18：2、c9t11C18：2、t10c12C18：2、C18：3、C19：0、C20：0、C20：4、C20：5、C22：6（均购自Nu—Chek公司，纯度≥98％）。
基金
Supported by Key Project of Gansu Provincial Sci. &Tech. Depart-ment in 2008 (0801NKDA036)~~
