Figure 2.

Selection in mutant trait space. (a) Selection coefficient as a function of relative mutant growth rate γ = (g₂ − g₁)/g₁ and relative mutant lag time ω = (λ₂ − λ₁)g₁. Mutants in the red region are deleterious (s(x) < 0) at all frequencies x, while mutants in the blue region are beneficial (s(x) > 0) at all frequencies. Mutants in the green region are conditionally neutral, being beneficial at some frequencies and deleterious at others. Yield values are ν₁ = 10³ and ν₂ = 10⁴. (b) Same as (a) but in the trait space of relative mutant growth rate γ and relative mutant yield ν₂/ν₁, for a mutant with longer lag time (ω = 0.1). (c) Same as (b) but for a mutant with shorter lag time (ω =−0.1).