Fatty acid composition in different muscle depot during growth of Yanbian Yellow Cattle

• 作 者: Y. Yan Q.S. Gao C.G. Yan X.Z. Li
• 机 构: Co-Innovation Center of Beef Cattle Science and Industry Technology,Yanbian University, Yanji, Jilin
• 出 处: 2017第四届中国肉牛选育改良与产业发展国际研讨会
• 发表日期: 2017年3期
• 关键词: Beef cattle Age Muscle Fatty acid Gene expression

　　We hypothesized that fatty acid composition would differ among different muscle depots andover time on a finishing diet.The present study was conducted with 16 Yanbian Yellow Cattle steers (~ 8 mo of age).Steers were fed a corn-based diet and were assigned randomly to 4 sampling groups.Five consecutive biopsy samples were taken from chuck,loin and round muscle at age 12,16,20 and 24 mo.Fat content in muscle tissues was increased from 12 to 24 mo of age and the order of fat content in muscle tissue depot was loin >round > chuck at 12,16,20 and 24 mo of age.There were significant differences in the concentration of stearic acid (18:0),oleic acid (18:ln-9),linoleic acid (18:2n-6),SFA,MUFA,PUFA,and the MUFA:SFA and PUFA:SFA ratios with the age.At the early sampling period,the musle had low MUFA:SFA ratio and PUFA:SFA ratios and at 24 mo of age had the highest MUFA:SFA and PUFA:SFA ratios.There were significant depot effects for stearic acid (18:0),linoleic acid (18:2n-6),SFA,MUFA,PUFA,MUFA:SFA and PUFA:SFA ratio in the different muscles.