Comparative Analysis on Nutrient Quality of Female Yak Eliminated from Different Areas

In order to compare the nutritional composition difference of the female yak eliminated in different areas,the nutritional quality of the Longissimus dorsi of eliminated female yak meat in 6 areas,including Henan county,Gangcha county,Bazhou county,Diqing county,Jiulong county and Hongyuan county were analyzed. Principal component analysis and cluster analysis were used for finding out the similarities and differences from different areas of female yak eliminated.The results demostrated that:In terms of proximate nutrients,there was no significant difference in different regions on ash(P>0.05),other indexes showed significant difference(P<0.05),among them,the fat content of the female yak eliminated in Jiulong county was significantly higher than that in other regions(P<0.05),the protein content of the female yak eliminated in Henan county was the highest,at 22.01%,while the cholesterol content of the female yak eliminated in Hongyuan county was the lowest,at only 82.65 mg/100 g;there was no significant difference between saturated fatty acid and total fatty acid(P>0.05),MUFA of the female yak eliminated in Diqing and Jiulong were significantly higher than that in other regions(P<0.05),the content of PUFA in Henan and Gangcha were significantly higher than other regions(P<0.01);EAA/TAA was no significant difference(P>0.05),while other amino acids were significantly different(P<0.05);the results of principal component analysis and factor analysis showed that cholesterol,MUFA,EAA,EAA/TAA and EAA/NEAA contributed significantly to the variance of nutritional quality of female yak meat;the eliminated female yak meat in 6 regions could be roughly divided into three categories according to the nutritional composition. Among them,the first category includes Henan county and Gangcha county,the second category is Bazhou county、Jiulong county and Hongyuan county,and the third category is Diqing county. In the first category,the fat content of the female yak eliminated was lower,and MUFA,EAA/TAA and EAA/NEAA were lower than other regions;in the second category,the proportion of amino acids was appropriate,and the content of fatty acids and cholesterol was moderate;the third category had higher levels of fat,the highest levels of MUFA and cholesterol.