Data from: The maintenance of obligate sex in finite, structured populations subject to recurrent beneficial and deleterious mutation

Although there is no known general explanation as to why sexual
populations resist asexual invasion, previous work has shown that sexuals
can outcompete asexuals in structured populations. However, it is
currently unknown whether costly sex can be maintained with the weak
structure that is commonly observed in nature. We investigate the
conditions under which obligate sexuals resist asexual invasion in
structured populations subject to recurrent mutation. We determine the
level of population structure needed to disfavour asexuals, as calculated
using the average Fst between all pairs of demes. We show that the
critical Fst needed to maintain sex decreases as the population size
increases, and approaches modest levels as observed in many natural
populations. Sex is maintained with lower Fst if there are both
advantageous and deleterious mutation, if mutation rates are sufficiently
high, and if deleterious mutants have intermediate selective strengths,
which maximises the effect of Muller's Ratchet. Additionally, the
critical Fst needed to maintain sex is lower when there are a large number
of subpopulations. Lower Fst values are needed to maintain sex when demes
vary substantially in their pairwise distances (e.g., when arrayed along
one dimension), although this effect is often modest, especially if some
long-distance dispersal is present.