Figure 2.

Genetic differentiation at 23 microsatellite loci across the genome on the basis of F_ST, R_ST, D′, and D_K. A compares A. gambiae and A. arabiensis, whereas B compares the M and S molecular forms of A. gambiae at 25 loci, the first two of which cannot be amplified for A. arabiensis. Note that the two A. gambiae forms are practically indistinguishable except at loci H678 and E614, where they are clearly distinct (see Fig. 1B). The numbers of sampled alleles are shown at each locus. Bars represent genetic distance values in red (“clearly different”), yellow (“marginal”), or green (“indistinguishable”), according to the following criteria. For D_K, P_t and P_f are at >10%, between 2.5 and 10% or at <2.5% probability, respectively; for D′ and F_ST, P_d and P_s are at <2.5%, between 2.5 and 10% or at >10% probability, respectively; for R_ST, the value of Nm is <0.5, between 0.5 and 3 or >3, respectively.