Figure 3.

F_st between a population and a hypothetical admixture of that population with a second population. $F_{\mathit{\text{st}}}[\underset{¯}{p_1},\gamma \underset{¯}{p_1}+(1-\gamma )\underset{¯}{p_2}]$, seen as a function of γ, is plotted against γ (eq. 7). Populations 1 and 2 represent populations of European and Native American descent, respectively, and $\underset{¯}{p_1}\text{ and }\underset{¯}{p_2}$ are based on allele frequencies estimated from Wang et al. (2008). The same twenty randomly selected loci as in Figure 1 are considered, with each curve representing a different locus. In accordance with Theorems 3 and 4, F_st is always decreasing and convex in γ.