Fig. 7

The percentage suppression of the total female population (dotted lines) as a function of the fitness of the resistant suppressor mutation (w for heterozygotes, w ² for homozygotes) and the intrinsic rate of increase of the population (R _m ). The solid line shows the extinction curve w = w _ex (100% suppression line), below which the population is eliminated (shaded area). For \(1 \ge w > w_{1} = \left( {1 - 10^{ - 7} } \right)\) (zone too narrow to appear on plot), the suppressor autosome tends to fixation; below w = w ₁ (all visible areas of plot) it tends to an intermediate equilibrium, which rescues the population only in the non-shaded area. For m = 0.95, v = 10⁻⁷