2.1.5 | Combining admixture scenarios from either source populations
We combine these three scenarios to obtain nine alternative scenarios for the admixture history of population H (Figure 1 ,Table 1 ), with the only condition that, at each generationg in [1..20], parameters satisfys Afr,g + s Eur,g +h g = 1, with h g, in [0,1] being the remaining contribution of the admixed population H to itself at generation g .
Four scenarios (Afr2P-EurDE, Afr2P-EurIN, AfrDE-Eur2P, and AfrIN-Eur2P) consider a mixture of pulse-like and recurring admixture from each source. Three scenarios (Afr2P-Eur2P, AfrDE-EurDE, and AfrIN-EurIN), consider symmetrical classes of admixture scenarios from either source. Two scenarios (AfrIN-EurDE and AfrDE-EurIN) consider mirroring recurring admixture processes. Importantly, this scenario design considers nested historical scenarios in specific parts of the parameter space.