Evolution (from right to left) of ΔΠ_as as a function of Δν_as for models with an initial composition of X₀ = 0.70 and Z₀ = 0.017 either including overshooting (α_ov = 0.15, light blue) or not (dark blue). The evolution, from right to left, starts at the late main-sequence phase and evolves past the beginning of the subgiant phase (symbolised by the vertical dashed lines). The best fit models for each prescription are shown with the empty circles.