Figure 6.

Regions in the space of scaled population size $N{\overline{s}}_b$ and scaled deleterious mutation rate $u_d/{\overline{s}}_b,$ where linked mutations interfere when deleterious effects are weak. The dashed and dotted lines, respectively, show (15) and (16) with beneficial mutation rate $u_b={10}^{-12}{u}_d,$ and the solid horizontal line separates the regimes where interference by deleterious mutations can be neglected and where it is effective. The boundaries separating these evolutionary regimes for $s_d/{\overline{s}}_b\to 0,{10}^{-2},{10}^{-1}$ are depicted, respectively, by circles, squares and triangles. The points where $u_d/s_d<1$ are not shown as the analytical expression (9) does not hold for such parameters.