牦牛种间杂交后代乳脂肪酸含量比较  

Comparison of Fatty Acids Contents in Milk of Yaks of Interspecific Hybridization Generation

作　　者：杨明[1] 陈雪梅[1] 文勇立[1] 王建文[2] 傅昌秀[2] 吴贤智 张金灵[4] 

机构地区：[1]西南民族大学生命科学与技术学院,四川成都610041 [2]四川省畜禽改良指导总站,四川成都610041 [3]四川省红原县畜牧兽医局,四川红原624400 [4]四川省畜牧科学研究院,四川成都610066

出　　处：《食品科学》2008年第8期478-481,共4页Food Science

基　　金：四川省科技厅应用基础项目(07JY029-046)

摘　　要：分析了西门塔尔×藏黄牛×牦牛、荷斯坦奶牛×藏黄牛×牦牛、荷斯坦牛×牦牛、娟姗×牦牛四种杂种牛乳脂肪酸组成特点。样品提取脂肪后进行甲酯化,用气相色谱-质谱联用(GC-MS)法测定脂肪酸组成。结果表明:四个品种之间,除十一酸、月桂酸等8种脂肪酸外的其它18种脂肪酸在品种间均有差异(p<0.05);不饱和脂肪酸的含量差别较大,从42.20%～50.22%不等,西门塔尔×藏黄牛×牦牛不饱和脂肪酸的含量(50.22%)显著高于娟姗×牦牛(42.20%),多不饱和脂肪酸在品种间差异显著,荷斯坦牛×牦牛含量最高,为30.53%,MUFA/PUFA为0.61:1。可见,荷斯坦牛×牦牛乳脂肪酸营养价值高,这对乳品开发和牦牛品种改良具有重要意义。Fatty acids compositions in milk of four kinds of crossbred yaks, such as Simmental × Tibetan cattle × yak, Holstein cows × Tibetan cattle × yak, Holstein cows × yak, Juanshan cattle × yak were analyzed. After being extracted from milk samples, methyl esterification of fatty acids was carried out, and then their compositions were analyzed using GC-MS. Results demonstrated that 18 varieties fatty acids show significant difference with different yak varieties except hendecanoic acid lauric acid （p 〈 0.05）. There is great difference among contents of unsaturated fatty acids in milk of different varieties yaks, ranging from 42.20% to 50.22%. The content of unsaturated fatty acid in milk of Simmental × Tibetan cattle × yak （50.22%） is obviously higher than that of unsaturated fatty acid in milk of Juanshan cattle × yak （42.20%）. Significant difference among contents of polyunsaturated fatty acids exists with different yak varieties, and the highest is in milk of Holstein cows × yak （30.53%） with ratio of MUFA/PUFA 0.61：1. The results indicated that milk of Holstein cows × yak has high nutritional value, which has the important meaning to dairy products development of yak and breeding of cattle.

关 键 词：杂种牛 乳 脂肪酸 气相色谱-质谱 

分 类 号：TS252.1[轻工技术与工程—农产品加工及贮藏工程]