SRAP markers were used to amplify and analyze the genomic DNA of three Common Carp populations including Jian Carp (Cyprinus carpio var. jian), Huanghe Carp (C.c.haematopterus), and the FFRC Strain Common Carp (C.carpio). Of the 110 bands amplified by 10 primer combinations,92 (83.6%) were polymorphic.The average of polymorphism information content (PIC) was 0.256.The highest and lowest Nei's diversity indexes were found in FFRC Strain Common Carp population (0.233) and Jian Carp population (0.205),respectively.The average Shannon's indexes were 0.332,0.298 and 0.352,respectively in three populations.As to the proportion of polymorphic loci,the most diverse group examined in our work was the FFRC Strain Common Carp population (71.2%),and the least was Huanghe Carp population (65.2%).The results indicate rich polymorphism information content and large genetic diversity in the FFRC Strain Common Carp population.The genetic distance and genetic identity results also suggest that the FFRC Strain Common Carp inherits more genetic material from Jian Carp than from Huanghe Carp.