Figure 4.

The effects of selection at reference loci on the power of the FITR. The powers of the FITR under various selection strengths, s₀, at focal loci are shown as functions of the selection coefficient, $s_h(h\ne 0)$, at reference loci for demographic models 1 and 5. Each point corresponds to the power obtained by 100,000 simulations at the 5% significance level. The number of reference loci, the duration of sampling time, and the number of sampled points were R = 10, T = 1000, and (L + 1) = 11, respectively. The intervals between any two adjacent sampled points were the same at $\mathrm{\Delta }t=t_i-t_{i-1}=100 (i=1,2,\dots ,L)$. The initial frequency for all $R+1$ loci, $x_{h,0}$, was assumed to be 0.5.