12月龄西藏羊肌纤维特性研究

Muscle Fibre Characteristics of Tibetan Sheep

试验以12月龄的西藏羊为研究对象,采用石蜡切片的方法,测定了其背最长肌、臂三头肌和股二头肌的肌纤维直径、肌纤维面积和肌纤维密度。结果表明:西藏羊公羊的背最长肌、臂三头肌和股二头肌等3个肌肉部位间的肌纤维直径、肌纤维面积和肌纤维密度等差异不显著(P>0.05),母羊的背最长肌、臂三头肌和股二头肌也表现出同样的规律;背最长肌和股二头肌的肌纤维直径和肌纤维面积均为公羊高于母羊,肌纤维密度为母羊高于公羊,但差异均不显著(P>0.05),臂三头肌的肌纤维直径为公羊显著高于母羊(P<0.05),肌纤维面积和肌纤维密度与背最长肌和股二头肌一致。

Using the methods of paraffin section, we have determinated the muscle fiber diameter, muscle fiber cross-sectional area, and muscle fiber density of longissimus dorsi muscle, triceps muscle of arm, andbiceps femoris musclewith Tibetan sheep of twelve months.The results showed that muscle fiber diameter, muscle fiber cross-sectional area, and muscle fiber density had no signigicant difference among longissimus dorsi muscle, triceps muscle of arm, and biceps femoris muscle of rams, and the ewes have the same patterns with rams; Muscle fiber diameter and muscle fiber cross-sectional areaof longissimus dorsi muscle and biceps femoris muscle of rams were higher than those of ewes, and muscle fiber densitywas high than those of rams; Meanwhile, Muscle fiber diameter of triceps muscle of arm of rams was higher than those of ewes, muscle fiber cross-sectional area and muscle fiber density had the same regular pattern with those of longissimus dorsi muscle andbiceps femoris muscle.