Globally, meat serves as a valuable source of protein that helps supplement the intake of essential nutrients for humans. Pork is the main meat consumed worldwide, as many breeds of pigs have been fully adapted to be used in different environments and are able to efficiently convert feed into high quality protein. Many breeds of swine have developed dominant traits, such as high reproductive rate (short interval to maturity, short gestation period, multiple offspring per pregnancy, and quick tendency to rebreed), high feed conversion rate, disease resistance, etc.