- Chang H, Ou J, Zhong J, Wang X, Guo C, Bin S, et al. [Single nucleotide polymorphism analysis on the 5' regulatory region of IGF2 gene in Wuzhishan pig]. Yi Chuan. 2007;29:57-64 pubmed..These results provide the miniature pig breeds such as the Wuzhishan pig with certain genetic references on the regulation of growth and development, and the mechanism of its dwarfism. ..