Geographic and cultural practices impact founder events in humans.
We show the variation in estimated founder intensity as a violin plot across groups, classified in three plots. Each violin plot includes a boxplot and the number of populations (n) in each group along with the mean ± standard deviation and the total number of individuals used in the analysis. Note that within each panel, the areas of violins are the same. (A) Continental vs. island populations. This plot shows the variation in founder intensities estimated for present-day populations in the HO37 dataset classified according to geography. (B) Tribal vs. non-tribal groups in South Asia. This plot shows the variation in founder intensities estimated in the South Asian groups from the IndiaHO dataset. (C) Ancient hunter-gatherers, Near Easter farmers, European Neolithic farmers, Steppe pastoralists and Bronze Age populations. This plot shows the variation in estimated founder intensities for ancient groups in the HO44 dataset, classified based on their mode of sustenance. Below the number of individuals used in the analysis, we report the median radiocarbon age of each category in years BP (yBP). We note that in order to increase the number of groups in each category, we considered populations where the estimated founder age was dated below 300 generations before sampling age (default for other analyses was below 200 generations).