In this research,30 pairs of microsatellite primers were used to analyze the genetic variation of the selected populations in common carp(Cyprinus carpio L).The average alleles of each generation(F1-F4)were 7.761 9,6.918 9,5.088 9,4.666 7 respectively,the average Polymorphism Information Content values were 0.621 5,0.751 2,0.731 4,0.743 1 respectively,and the average heterozygosity were 0.773 0,0.713 5,0.759 3,0.719 6 respectively,which embodied that the directive breeding had affected the population's gene...