Figure 6.

Relative depth as a function of the width of the diversity troughs, for different values of t_m and N_c in the neutral case and for selective scenarios with identical fixation times. t_m goes from 1 to 333 by increments of 1, the corresponding values of the selection coefficient s are indicated on the left of the legend bar (for all of them we have N₁s ≫ 1). N₁ = 1,500. N₀ is given by Equation (7) and depends on N_c and t_m. The jumps in the neutral curves for N_c = 20, 40, 60, 80, and 100 are due to the use of 2 different approximations for the frequency of the mutant, Equations (4a) and (4b) and are located at t_m = 2N_c.