GROWTH AND MICROSATELLITE ANALYSIS OF F5 SELECTED LINE OF ARGOPECTEN IRRADIANS CONCENTRICUS
海湾扇贝南部亚种（Argopecten irradians concentricus）选育系F5的生长及SSR分析

Production performance were compared and 11 SSR primers were used to detect the genetic diversity and genetic divergence between the F5 selected line and the control line of Argopecten irradians concentricus. The results showed that, the production performance of the selected line increased significantly at the shell height, shell length, shell breath, total weight, shell weight, fresh weight, adductor weight, adductor rate, survival rate, yield per cage and other traits to the control line by 17.02%, 16.67%, 15.02%, 43.71%, 35.86%, 58.74%, 81.18%, 29.46%, 17.94% and 69.47% respectively. The average number of alleles (Na), average effective numbers of alleles (Ne), average observed heterozygosity (Ho), average expected heterozygosity (He) and the average of polymorphism information content (PIC) for the selected line were 3.2727, 2.3366, 0.3152, 0.5326 and 0.4622, respectively. Whereas the values of Na, Ne, Ho, He and PIC for the control line were 3.3636, 2.3203, 0.3545, 0.5441 and 0.4693, respectively. The genetic distances (Dxy) and the genetic differ-entiation (Fst) between selected line and the control line were 0.1161 and 0.0465 (P<0.05) respectively. The results suggested that the production performance of the selected line was much better than that of the control line, however, the genetic diversity were lower than that of the control line, and significant genetic divergence were detected between the two lines, there were great genetic progress of the F5 selected line. However, the F5 selected line still having high levels of genetic diversity, which provides space for further selection.