不同海拔地区牦牛骨骼肌组织结构比较

Comparison of Skeletal Muscle Structure of Yaks from Different Altitude Areas

为了探讨高原牦牛骨骼肌组织对低氧环境的适应,选取不同海拔梯度牦牛骨骼肌组织进行研究。结果表明,果洛牦牛骨骼肌纤维直径细于泽库牦牛,肌纤维表面积密度大于泽库牦牛,差异显著(P<0.05);果洛牦牛骨骼肌线粒体平均截面积、平均体积和面数密度均大于泽库牦牛,差异显著(P<0.05)。这些组织学改变是机体为了适应高海拔低氧环境,为了增加氧的利用而做出的组织学的改变和适应。大通牦牛骨骼肌各项指标表现出一定的特殊性,这与大通牦牛为改良品种有关。

The skeletal muscle structure of yaks from different altitude areas was studied in order to investigate the adaptability of yak skeletal muscle to hypoxia environment.Results showed that： The diameter of skeletal muscle fiber of yaks from Guoluo was smaller significantly（P0.05） than that of yaks from Zeku,while the surface area,the average sectional area,the average volume,and the numerical density of skeletal muscle fiber mitochondria of yaks from Guoluo was larger significantly than that of yaks from Zeku（P0.05）.These changes in skeletal muscle structure were thought to be a kind of adaptability to hypoxia environment in high altitude area,and were thought to be the ability to increasing the utilization rate of oxygen.Those indicators mentioned above in Datong yak were particular,which were thought to be involved with their variety.