This study investigated genetic diversity and genetic structure of six wild crucian carp populations collected from Heilongjiang River, Yangtze River, Fenghua River and Huaihe River by 8 genome microsatellites(G-SSR) and 8 transcriptome microsatellites(EST-SSR). The mean Na, Ne, Ho, He and PIC of the eight G-SSR loci were 22, 12.9,0.769, 0.893 and 0.879, respectively. Fst values ranged from 0.008 to 0.085, indicating that there were different degrees of genetic differentiation among the six wild crucian car...