Abstract：In the research, microsatellite markers were used to identify individuals of 3 foreign pig breeds (Yorkshire, Landrace and Duroc). 10 littermates were chosen from each breed. Individual variation were analyzed based on SSR loci polymorphisms. The results showed that 20 pig individuals of 2 litters could be differentiated using 7 microsatellite markers; after adding further 7 microsatellite markers, the last 10 pig individuals of another litter could also be differentiated. Traceability from meat to blood using these microsatellite markers was also studied by random selecting 5 pigs from slaughter. Results showed that microsatellite loci information of meat samples were correspondent to which of blood samples. So it is feasible to trace the pigs from meat samples in supermarket to blood samples in slaughter by microsatellite markers.
