Genetic polymorphism of breeding populations of golden pompano (Trachinotus ovatus)

We used 11 pairs of microsatellite loci to investigate the genetic polymorphism oftwo breeding populations of golden pompano (Trachinotus ovatus) in Sanya, Hainan and Daya Bay, Guangdong. The average numbers of alleles (Na) at each microsatellite locus of the populations were 5.0 and 3.6, respectively; the average numbers of valid alleles (Ne) were 2.965 and 2.244, respectively. The observed heterozygosities (Ho) were 0.292~0.814 and 0.207~0.840, respectively; the expected heterzygosities (He) were 0.307~0.813 and 0.189~0.761, respectively. The PIC value ranged from 0.014 to 0.719 in Sanya population with an average of 0.509, while that of the Daya Bay population ranges from 0.168 to 0.711 with an average of 0.436. In Sanya population,five loci deviated from Hardy-Weinberg equilibrium (P0.05), while only 2 loci deviated from Hardy-Weinberg equilibrium in Daya Bay population. The Nei's genetic similarity coefficient of thetwo populations was 0.561 and their genetic distancewas 0.578. The genetic differentiation index of the 2 breeding populations (Fst) was 0.152. Structure analysis indicates that thetwo T.ovatus populations, which had higher genetic differentiation, were divided into twogroups and could be managed astwo breeding populations. Good genetic progress can be achieved by hybridization between thetwo breeding populations.