Data from: Ecological differentiation facilitates fine-scale coexistence of sexual and asexual Boechera
Rushworth, Catherine A., Duke University
Windham, Michael D., Duke University
Keith, Rose A., Duke University
Mitchell-Olds, Tom, Duke University
Published Sep 11, 2019 on Dryad.
Cite this dataset
Rushworth, Catherine A.; Windham, Michael D.; Keith, Rose A.; Mitchell-Olds, Tom (2019). Data from: Ecological differentiation facilitates fine-scale coexistence of sexual and asexual Boechera [Dataset]. Dryad. https://doi.org/10.5061/dryad.1jn5887
Premise of the study: Ecological differentiation (ED) between sexual and asexual organisms may permit the maintenance of reproductive polymorphism. Several studies of sexual/asexual ED in plants have shown that the geographic ranges of asexuals extend beyond those of sexuals, often in areas of higher latitude or elevation. But very little is known about ED at fine scales, wherein coexistence of sexuals and asexuals may be permitted by differential niche occupation. Methods: We used 149 populations of sexual and apomictic lineages in the genus Boechera (rock cress) collected across a portion of this mustard’s vast range. We characterized reproductive mode, ploidy, and species identity or hybrid parentage of each individual, and then used a multi-pronged statistical approach to 1) identify ED between sexuals and asexuals; 2) investigate the impacts of two confounding factors, polyploidy and hybridization, on ED; and 3) determine the environmental variables underlying ED. Key results: We found that sexuals and asexuals are significantly ecologically differentiated across the landscape, despite fine-scale interdigitation of these two reproductive forms. Asexual reproduction was strongly associated with greater disturbance, reduced slope, and greater environmental variability. Although ploidy had little effect on the patterns observed, hybridization has a unique impact on the relationships between asexual reproduction and specific environmental variables. Conclusions: Ecological differentiation along the axes of disturbance, slope, and climatic variability, as well as the effects of heterozygosity, may contribute to the maintenance of sexuality and asexuality across the landscape, ultimately impacting the establishment and spread of asexual lineages.
This data file includes microsatellite allele calls for all individuals in this publication.
This R code can perform all environmental analyses from this manuscript using the environmental data sets.
This data file contains identifying information for each individual and environmental variables for each population. Each individual is represented by a single row, and multiple rows represent a single population.
This data file contains environmental variables and identifying information for each population in the study. Each population is represented by a single row.
This data file contains identifying information and environmental variables for the individuals relevant to FC3. Each row represents a single individual, and multiple rows make up a single population.
This data file contains identifying information and environmental variables for the populations relevant to FC3. Each row represents a single population.
National Science Foundation, Award: DEB-1311269, DEB-0816560