The growth rate of porcine muscle is directly related to the economic benefits of pig production, and skeletal muscle growth is an important part of muscle growth in pig. Meat production capacity is related to muscle fiber numbers and growth. Myogenin belongs to the MyoD gene family and fulfills a key function in muscle differentiation by controlling the onset of myoblast fusion and the establishment of myofibers. Insulin-like growth factor I (IGF-I) is an important regulation factor for the functioning of ...