DNA molecular markers are differences in the presence of DNA molecular fragments between organisms via standard operating procedures, The program first tracks the relationship between phenotypes and genotypes The results showed that 11 groups of microsatellite primers could amplify specific products with fluorescent markers in this gentian group, and 4 molecular markers reached significant levels in body weight and genotype correlation, The plaque multi-type microsatellite can be used as a molecular marker for molecular marker-assisted breeding (MAS), and in the future, fish with excellent growth traits can be selected。