Laiwu Black is one of Chinese natjve pig breeds, which has excellent germplasm properties such as high prolificacy and good meat quality. Laiwu pigs and western pig breeds were selected to study the essentials of meat quality traits and their molecular genetic mechanisms. The aim of this thesis is to lay the scientific foundations for use of Laiwu Black and MAS in modern high quality pig breeding.Sixty pigs, including pure Laiwu Black, pure Large Yorkshire, 1/2 Laiwu, 3/4 Laiwu and 1/4 Laiwu, were selected ...