Slaughter Performance and Meat Quality Characteristics Assessment of Wild-blooded Yaks in Gaize County of Ngari Prefecture of Tibet
[Objective]The aim of this experiment was to compare the slaughter performance and meat nutritional composition of different genders of wild-blooded yaks in Gaize county of Ngari prefecture of Tibet.[Method]Ten wild-blooded yaks in good condition and grazing naturally(half males and half females,aged 5-6 years,body weight 299.00 kg±30.50 kg and 247.00 kg± 10.20 kg,respectively),were randomly selected from Gaize county of Ngari prefecture.Slaughter trials were conducted to study the slaughter performance,carcass traits and meat nutritional quality characteristics of wild-blooded yaks.[Result]The pre-slaughter live weight,carcass weight,net meat weight,bone weight and tube circumference of male yaks with wild-blooded in Ngari prefecture were significantly or extremely significantly higher than those of female yaks(P＜0.05 or P＜0.01),while other slaughter and body condition indicators were not significantly different(P＞0.05).The carcass length,carcass width,carcass depth,carcass breast depth,hind leg circumference,thigh meat thickness and eye muscle area of male yaks were significantly or extremely significantly higher than those of female yaks(P＜0.05 or P＜0.01),while backfat thickness of female yaks was extremely significantly higher than that of male yaks(P＜0.01).The moisture content of male yak beef was significantly higher than that of female yaks(P＜0.05),the intramuscular fat content of female yaks was extremely significantly higher than that of male yaks(P＜0.01),there was no significant difference in protein,cholesterol,minerals,vitamin content and amino acid composition between the different genders(P＞0.05).And the amino acid ratio was rational for high quality protein source.In terms of fatty acid composition,C15∶0,C16∶0,C16∶1,C17∶0,C18∶0,C18∶1n9c,C20∶0,SFA,MUFA and TFA in female yak beef were significantly or extremely significantly higher than those in male yak beef(P＜0.05 or P＜0.01),and PUFA/SFA in male yak beef were significantly higher than that in female yak beef(P＜0.05).[Conclusion]Gender had a certain influence on the slaughter performance and meat quality of wild-blooded yak in Ngari prefecture.The carcass traits of male yak was more prominent.The high intramuscular fat,high-quality amino acid composition and rich UFA content of the longissimus dorsi muscle of female yak made its meat quality and nutritional value slightly better than that of male yak,which provided basic data for the targeted breeding of new breeds of wild-blooded yak and the development of domestic yak purification and breeding innovation.
Ngari prefecture of Tibetwild-blooded yakslaughter performancemeat quality
万方数据
维普
