Fig. 3.

Equilibrium fitness loads as a function of the effective population size. Solid, dashed, and dotted lines are for u/v = 1/3, 1/9, and 1/999, respectively. Straight lines to the left are given by Eq. 5, and data points were obtained by computer simulation of a Wright–Fisher model. The final (rightmost) data points for each curve are the infinite-population size limits obtained by use of Eqs. 3a–3c. In all cases, the total mutation rate is u + v = 10⁻⁶, and k = 0.1.