Figure 8

Change in the frequencies of fixed mutation rates vs . lg( U )-given different initial individual fitness ( R _u = 1). y ₁ represents normal distribution with mean μ = 0.5 and variance σ² = 0.1; y ₂ represents gamma distribution with α = 20, β = 20; and y ₃ represents the initial fitness of all individuals equal to a unified value 1.0. In all cases, the conditions were constant: N = 10⁵, p _b = 3%, ${\overline{s}}_d=0.3$, ${\overline{s}}_b=0.01$.