Genetic Structure and Genetic Diversity Analysis of Artificial Selection Populations of Mandarin fish Siniperca chuatsi

Five microsatellite markers were used to analyze the genetic structure in three populations of mandarin fish Sinipercachuatsi,including two artificial selection populations(Foshan population and Qingyuan population)and one wild population(Yangtze River population).Five loci were found to be polymorphic(PIC0.50)in the three populations.The Foshan population and Qingyuan population had PIC values of 0.6686 and 0.6186,lower than the Yangtze River population.There were expected heterozygosity(He)value of 0.7243 in Qingyuan population,0.82803 in Foshan populations and 0.6698in Yangtze River population.Genetic distance between Qingyuan population and Yangtze River population(value 0.3476)was found shorter than that in genetic distance between Foshan population and Yangtze River population(value 0.4238).The findings indicated that the selective breeding led to reduction in the genetic diversity of mandarin fish,Qingyuan population having the more advantages of variety breeding and artificial breeding than Foshan population.