Figure 5

Two examples of genetic and geographic distance plots obtained after 500 generations. Gaussian migration probability functions were used. The displayed median (black line) and lower and upper bounds of the scatter (grey area) of the F_ST values are the result of averaging the median and lower and upper bounds of F_ST–distance plots from 50 random topologies of 100 demes. The dashed line indicates the median distance of maximum F_ST–distance correlation (that is, the peak of the DMC distribution; Figure 4). Both plots are based on the results of simulations that used a maximum migration distance of 36.1 (Figure 4f). The left plot (a) gives the results of the simulations on landscape E (Figure 2) and is similar to a case-IV F_ST–distance relationship from Hutchison and Templeton (1999); Figure 1. The right plot (b) presents the results of simulations on landscape A (Figure 2) and represents the case-I F_ST–distance relationship from Hutchison and Templeton (1999); Figure 1. Relatively few deme pairs have a high interdeme geographic distance, which explains the reduced scatter at high distance values.