大足黑山羊不同部位肌肉脂肪酸比较研究  

Comparative Study on Muscle Fatty Acids in Different Carcass Parts of Dazu Black Goats

作　　者：郭俊涛 谢遇春 苏馨 赵存 王志新[1] 杨游[2] 柏雪[3] 李金泉[1] 刘志红[1] GUO Juntao;XIE Yuchun;SU Xin;ZHAO Cun;WANG Zhixin;YANG You;BAI Xue;LI Jinquan;LIU Zhihong(Goat Genetics and Breeding Engineering Technology Research Center,Inner Mongolia Autonomous Region,Key Laboratory of Mutton Sheep Genetics and Breeding,Ministry of Agriculture and Affairs,Key Laboratory of Animal Genetics,Breeding and Reproduction,Inner Mongolia Autonomous Region,College of Animal Science,Inner Mongolia Agricultural University,Hohhot 010018,China;College of Animal Science and Technology,Southwest University,Chongqing 400715,China;College of Life Science and Technology,Southwest Minzu University,Chengdu 610000,China)

机构地区：[1]内蒙古农业大学动物科学学院,内蒙古自治区动物遗传育种与繁殖重点实验室,农业农村部肉羊遗传育种重点实验室,内蒙古自治区山羊遗传育种工程技术研究中心,内蒙古呼和浩特010018 [2]西南大学动物科技学院,重庆400715 [3]西南民族大学畜牧兽医学院,四川成都610000

出　　处：《肉类研究》2020年第9期6-11,共6页Meat Research

基　　金：“十三五”国家重点研发计划重点专项(2018YFD0502000);内蒙古自治区科技重大专项(2020ZD0004);国家自然科学基金地区科学基金项目(31360537;31660640)。

摘　　要：为研究大足黑山羊不同部位肌内脂肪、脂肪酸含量和组成方面的差异,以处于相同饲喂条件且体质量相近的6只5月龄大足黑山羊为研究对象,分别利用索式抽提法和气相色谱-质谱联用法测定背最长肌和臂三头肌肌内脂肪含量和脂肪酸组成。结果表明:大足黑山羊背最长肌中肌内脂肪含量为3.2%,臂三头肌为3.0%,背最长肌略高于臂三头肌;大足黑山羊背最长肌和臂三头肌各检测出33种脂肪酸,2个部位各脂肪酸含量基本一致,但与背最长肌相比,臂三头肌反油酸(C18:1 n-9t)含量较高,而介子酸(C22:1)含量较低;16种饱和脂肪酸中,仅十七碳酸(C17:0)含量背最长肌极显著高于臂三头肌(P<0.01);17种不饱和脂肪酸中,4种脂肪酸在不同部位间存在显著差异,背最长肌二十碳烯酸(C20:1)含量极显著高于臂三头肌(P<0.01),油酸(C18:1 n-9c)含量显著高于臂三头肌(P<0.05),臂三头肌反油酸(C18:1 n-9t)含量极显著高于背最长肌(P<0.01);臂三头肌和背最长肌中不同种类脂肪酸相对含量:单不饱和脂肪酸>饱和脂肪酸>多不饱和脂肪酸>中链脂肪酸,臂三头肌和背最长肌中饱和脂肪酸和单不饱和脂肪酸相对含量之和分别为88.4%和86.3%;臂三头肌和背最长肌中n-3/n-6值相近且均在3.0左右;背最长肌多不饱和脂肪酸与饱和脂肪酸含量比值(P/S)为0.45,臂三头肌P/S值为0.41,背最长肌高于臂三头肌。说明不同部位大足黑山羊肉脂肪酸含量及组成存在差异,并可能在一定程度上影响肉的风味及营养价值。In order to understand the difference in intramuscular fatty acid composition between different carcass parts of Dazu black goats,six 5-month-old goats with similar body mass,raised under the same conditions,were slaughtered and Longissimus dorsi and Triceps brachii muscles were excised for the analysis of intramuscular fatty acid composition by Soxhlet extraction and gas chromatography-mass spectrometry(GC-MS).The results showed that the content of intramuscular fat in Longissimus dorsi was slightly higher than in Triceps brachii(3.2%versus 3.0%).A total of 33 fatty acids were detected in either muscle,and the contents of fatty acids in the two muscles were basically the same except that the contents of C18:1 n-9t and C22:1 in Triceps brachii were respectively higher and lower than in Longissimus dorsi.Among the 16 saturated fatty acids tested,the content of only heptadecanoic acid(C17:0)in Longissimus dorsi was significantly higher than that in Triceps brachii(P<0.01),and the contents of 4 of the17 unsaturated fatty acids investigated were different in both muscles.The contents of eicosanoic acid(C20:1)and C18:1 n-9c in Longissimus dorsi were significantly higher than those in Triceps brachii(P<0.01 and 0.05,respectively),whereas the opposite was observed for the content of C18:1 n-9t(P<0.01).For both muscles,the relative contents of various fatty acids were in the decreasing order:monounsaturated fatty acids>saturated fatty acids>polyunsaturated fatty acids>medium chain fatty acids.The total relative contents of saturated fatty acids and monounsaturated fatty acids in Triceps brachii and Longissimus dorsi were 88.4%and 86.3%,respectively.The n-3/n-6 ratio values in the two muscles were similar,about 3.0.The ratio of polyunsaturated to saturated fatty acids contents(P/S)in Longissimus dorsi was higher than that in Triceps brachii(0.45 versus 0.41).These data showed that there were differences in the content and composition of intramuscular fatty acids between different carcass parts of Dazu black goats,which ma

关 键 词：大足黑山羊 肌内脂肪 脂肪酸 

分 类 号：TS251.1[轻工技术与工程—农产品加工及贮藏工程]