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Functional Histology of Skeletal Muscle, Development and the Endocrine Function in Domestic Animals

家畜骨骼肌的功能组织学、发育和内分泌功能

基本信息

批准号：
06660382
负责人：
TAKAHARA Hitoshi
金额：
$ 1.22万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06660382/
关键词：
Skeletal muscle Meat quality Muscle fiber type Histochemistry Hypophysis Endocrinology

项目摘要

1. Studies on the skeletal muscle development and the meat quality of Japanese Black steers (Part I)(1) Biceps femoral muscle is the largest skeletal muscle and acts mainly as the locomotion of the hind leg. But, the functional activity of the proximal part muscle may be changed to maintain the posture and support the heavy body weight.(2) The muscle fibers were enzyme-histochemically distinguished into three types (alphaR, betaR and alphaW) in the biceps femoral muscle. The percentage of type betaR fibers was higher in the proximal part than that in the middle and distal part muscles. The percentage of type alphaW fibers was the highest in the distal part muscle.(3) Among the distal part, the percentage of type alphaR fibers was higher in the profound subpart than in the superficial subpart, while that of type alphaW fibers exhibited a converse tendency. These differencies will support the previous physiological properties which is the locomotion or the maitenance of posture.(4) Thoracic longissimus muscle is very important for the estimation of meat quality (Beef Marbling Score). The percentage of type betaR fibers in this muscle was larger than that of other breeds. It is suggested that increase of the percentage of type betaR fibers was resulted to obtain the good meat quality.(5) Histological properties of biopsy materials taken from longissimus and biceps femoral muscles of Japanese Black steers were observed. In the longissimusu muscle, histological volume score of fatty tissue was related significantly to Beef Marbling Score. This result was indicated that BMS could be estimated from the early observation of the perimysium deposits in the longissimus muscle.2. Studies on the growth and the endocrine controls of swine, chicken and Tokara native goat skeletal muscles will be reported later as part II.

1.日本黑牛骨骼肌发育与肉质的研究（一）（1）股二头肌是最大的骨骼肌，主要起后腿运动的作用。但是，近端部分肌肉的功能活动可能会改变，以保持姿势和支持沉重的体重。(2)肌纤维酶组织化学区分为三种类型（α R，β R和α W）在肱二头肌股肌。β R型纤维在近端肌群中所占比例高于中、远端肌群。α W型纤维在远段肌中所占比例最高。(3)在远侧部中，深亚部的α R型纤维的百分比高于浅亚部，而α W型纤维则表现出匡威的趋势。这些差异将支持先前的生理特性，即运动或姿势的维持。(4)胸最长肌是评定牛肉大理石花纹的重要肌肉。β R型肌纤维的比例高于其它品种。因此，提高β R型纤维的比例是获得良好肉质的主要原因。(5)对日本黑阉牛背最长肌和股二头肌活检组织的组织学特性进行了观察。在最长肌中，脂肪组织的组织学体积分数与牛肉大理石花纹分数显著相关。这一结果表明，可以通过对背最长肌肌束膜沉积的早期观察来估计BMS.关于猪、鸡和托卡拉本地山羊骨骼肌的生长和内分泌控制的研究将在后面作为第二部分报告。