Figure 6. The geography of recent gene-flow in Africa.

We summarise gene-flow events in Africa using the results of the GLOBETROTTER analysis. For each ethnic group, we inferred the composition of the admixture sources, and link recipient population to surrogates using arrows, the width of which is proportional to the amount it contributes to the admixture event. We separately plot (A) all events involving admixture source components from the Bantu and Semi-Bantu ethnic groups in Cameroon; (B) all events involving admixture sources from East and Southern African Niger-Congo speaking groups; (C) events involving admixture sources from West African Niger-Congo and East African Nilo-Saharan / Afroasiatic groups; (D) all events involving components from Eurasia. in (D) arrows are linked to the labelled 1KGP Eurasian groups. Arrows are coloured by country of origin, as in Figure 1—figure supplement 1. Numbers 1–8 in circles represent the events highlighted in section A haplotype-based model of gene-flow in sub-Saharan Africa. An alternative version of this plot, stratified by date, is shown in Figure 6—figure supplement 1.

DOI: http://dx.doi.org/10.7554/eLife.15266.032

Figure 6—figure supplement 1. Gene-flow in Africa over the last 2000 years.

Using the results of the GLOBETROTTER analysis we show the connections between different groups in sub-Saharan Africa over time. For each population, we inferred the date of admixture and the composition of the admixing sources. We link each recipient population to its donor components using arrows, the size of which is proportional to the amount it contributes to the admixture event. Arrows are coloured by country of origin, as in Figure 4 in the main text.

DOI: http://dx.doi.org/10.7554/eLife.15266.033