Abstract: 【Objective】 The purpose of this article is to understand the relationship of muscle fiber characteristics with meat quality and its breed and sex differences in pigs by collecting and analyzing the relative references. 【Result】①The formation of muscle fibers is a very complex biological process. The number, size and type of muscle fibers are the basic characteristics of muscle fibers. ②At present, the most commonly used classification method of muscle fibers is based on the polymorphic expression of MyHC gene in muscle fibers. ③Before birth, MyHC isomers were expressed in the order of embryonic, fetal and mature stages . After birth, the muscle fiber types were transformed into each other. ④Different types of muscle fibers can influence muscle color, pH, water hold capacity and so on because of their different metabolic characteristics. The size and density of muscle fiber also affect muscle quality because they are closely related to the type of muscle fiber. ⑤Different breeds of pigs show different muscle quality because of their different muscle fiber characteristics. The characteristics of muscle fibers are different between the sexes in order to adapt to their own growth and physiological needs.【Conclusion】The characteristics of muscle fiber in pigs directly affect the meat quality. Because of the various breeds and sexes, the formation of muscle fiber characteristics is different, which shows muscle quality is different.

Key words: pig; muscle fiber characteristic; meat quality; breed; sex

摘要： 【目的】研究猪肌肉肌纤维特性与肌肉品质的关系及品种、性别差异。【方法】国内外相关文献的收集、汇总及分析。【结果】①肌纤维的形成是一个非常复杂的生物学过程,肌纤维数目、大小及类型是肌纤维的基本特性。②肌纤维类型的划分,目前最常用的是根据肌纤维中MyHC基因的多态性表达对肌纤维进行分类。③出生前,MyHC异构体按照胚胎期→胎儿期→成熟期顺序表达,出生后,肌纤维类型具有相互转化的特性。④不同类型肌纤维由于代谢特征存在明显差异,因此会影响肌肉色泽、pH、系水力等肌肉品质性状。肌纤维大小、密度与肌纤维类型密切相关,因此也会影响肌肉品质。⑤不同品种猪肌纤维特性有明显差异,因而表现出不同的肌肉品质。为了适应各自生长发育及生理需要,猪不同性别间肌纤维特性也有所不同。【结论】猪肌肉肌纤维特性直接影响肌肉品质的优劣,品种、性别不同,肌纤维特性的形成有一定差异,表现出不同的肌肉品质。

关键词: 猪, 肌纤维特性, 肌肉品质, 品种, 性别