Data from: Estimating the number of sexual events per generation in a facultatively sexual haploid population

The following files are included in this dataset:
C script used in simulations: File contains the C scripts for three models used to simulated the behaviour of Fst between mating type subpopulations and LD between marker and mating type loci in haploid populations where there is 1. No selection, 2. Constant selection and 3. Stochastic selection on marker loci.

Oregon early 1990 Zymoseptoria tritici RFLP data: File contains joint mating type and RFLP genotypes for Zymoseptoria tritici samples collected in Oregon early in 1990

Oregon late 1990 Zymoseptoria tritici RFLP data: Contains joint mating type and RFLP genotypes of Zymoseptoria tritici isolates collected late in 1990 in Oregon.

VA 2009 Erisiphe necator microsatellite data: Contains joint mating type and microsatellite genotypes of Erisiphe necator isolates collected late in 2009 in Virginia.

VA 2010 Erisiphe necator microsatellite data: Contains joint mating type and microsatellite genotypes of Erisiphe necator isolates collected early in 2010 in Virginia.

Australia Rhyncosporium secalis microsatellite data: Contains joint mating type and microsatelite genotypes of Rhyncosporium secalis isolates collected in Australia.

Norway Rhyncosporium secalis microsatellite data: Contains joint mating type and microsatelite genotypes of Rhyncosporium secalis isolates collected in Norway.

Dothistroma septosporum microsatellite data: Dothistroma septosporum microsatellite data

In populations of facultatively sexual organisms the proportion of sexually produced offspring contributed each generation is a critical determinant of their evolutionary potential. However, estimating this parameter in natural populations has proved difficult. Here we develop a population genetic model for estimating the number of sexual events occurring per generation for facultatively sexual haploids possessing a biallelic mating type locus (e.g. Chlamydomonas, ascomycete fungi). Our model treats the population as two subpopulations possessing opposite mating type alleles which exchange genes only when a sexual event takes place. Where mating types are equally abundant we show that, for a neutral genetic marker, genetic differentiation between mating type subpopulations is a simple function of the effective population size, the frequency of sexual reproduction and the recombination fraction between the genetic marker and the mating type locus. We employ simulations to examine the effects of linkage of markers to the mating type locus, inequality of mating type frequencies, mutation rate and selection on this relationship. Finally we apply our model to estimate the number of sexual reproduction events per generation in populations of four species of facultatively sexual ascomycete fungi which have been jointly scored for mating type and a range of polymorphic molecular markers. Relative estimates of are in line with expectations based on the known reproductive biology of these species.

When using this data, please cite the original publication:

Ennos RA, Hu X (2018) Estimating the number of sexual events per generation in a facultatively sexual haploid population. Heredity, online in advance of print. https://doi.org/10.1038/s41437-018-0171-1
Additionally, please cite the Dryad data package:

Ennos R, Hu X (2018) Data from: Estimating the number of sexual events per generation in a facultatively sexual haploid population. Dryad Digital Repository. https://doi.org/10.5061/dryad.3p4v855