A
total of 278 polymorphic SSR markers were used to genotype the 178 RILs
and 58 SSR markers showed polymorphism in the population. These SSR
markers were assigned to 12 linkage groups (Figure 1) with a total
length of 1365.73 cM and an average distance between adjacent markers of
23.41 cM. The number of markers on each linkage group ranged from 2 to
9. The order of markers in the constructed linkage map and the soybean
common linkage map (GmComposite 2003, http://www.soybase.org) were
consistent, except that satt591 and satt471 on linkage group A1 and
satt560 and satt534 on the B2 linkage group were inversed (Figure 2).
Figure 1. The genetic map of soybean based on SSR markers. The
genetic distances (cM) were shown on the left side and the markers on
the right.