Figure 5.

Patterns of diversity as a function of γ. An equilibrium background selection model with a single selected region is considered. The focal region has 3000 sites, with θ=0.005 per site. Coalescent simulations were used to generate random samples of size 20 under the two levels of recombination (ρ=NR=0 or 7.5). E(T₂₀) and E(ξ₂₀) were estimated at the mid-point and the left-end of the focal region, and are shown below and above the solid line, respectively.