小尾寒羊胚胎不同时期背最长肌的组织学研究

摘要

[Objective] The research aimed to study the longissimus dorsi muscle in different embryo period of Small Tailed Han sheep by histology biology method.[Method] Using Small Tailed Han sheep as research object,the change situations of the growth and development of muscle fiber in different stages of embryo period were studied at microcosmic level by using tissue section technology.[Result] The density of muscle fiber showed a decreasing trend with the change of time,while the diameter of muscle fiber increased with the decrease of the density.The weight gain of fetus in early embryo stage was not obvious,while the weight in late embryo stage and after birth rapidly increased with significant difference.[Conclusion] The research could provide basic data for the cross breeding of good-quality meat sheep.%[目的]利用组织生物学方法对不同时期小尾寒羊背最长肌进行研究.[方法]以小尾寒羊为研究对象,利用组织切片技术从微观层面研究胚胎期不同阶段肌纤维生长发育的变化情况.[结果]肌纤维的密度随着时间的增长呈现下降的趋势,而肌纤维直径随着密度的降低而增加.胚胎前期胎儿增重不明显,而胚胎后期及出生后体重迅速增加,差异显著.[结论]该研究可为开展优质肉羊杂交育种工作积累基础性数据.