Figure 2.

Expected coalescent times with different reproductive systems. The population size for all plots is N = 10,000. (A) Expected mean coalescent time according to Equation 6 in coalescent time units as a function of sex σ. The blue line represents between-individual mean coalescent time $E\left[{\mathrm{\tau }}_{\text{b}}\right]$, and the red line is within-individual mean coalescent time $E\left[{\mathrm{\tau }}_{\text{w}}\right]$. The vertical line represents $\sigma =1/N$ ($\text{Ω}=2$), and the horizontal solid lines show the predicted mean coalescent times for this value ($E\left[{\mathrm{\tau }}_{\text{b}}\right]\approx 1.5$; $E\left[{\mathrm{\tau }}_{\text{w}}\right]\approx 2$ on the coalescent timescale), whereas the horizontal dashed line shows $E\left[\text{τ}\right]=1$. (B and C) Expected coalescent time if selfing is also included, according to Equation 9. Line colors are the same as in A, with (B) σ = 1 or (C) σ = 1/N ($\text{Ω}=2$).