2.1.1 | Founding of the admixed population H
For all scenarios (Figure 1 , Table 1 ), we chose a
fixed time for the founding (generation 0, forward-in-time) of the
target admixed population H occurring 21 generations before present,
with admixture proportions s Afr,0 ands Eur,0 from either source population S
respectively, African and European in our case, withs Afr,0 + s Eur,0 = 1, ands Afr,0 in [0,1]. This corresponds to the
first arrival of European permanent settlers in the Americas in the late
15th century, considering 20 or 25 years per
generation and the sampled generation born in the 1980s. Note that
simulations considering a parameter s Afr,0 close
to 0, or alternatively 1, correspond to founding of the population H
from either one source population, therefore delaying the first “real”
genetic admixture event to the next admixture event. Following founding,
we consider three alternative scenarios for the admixture contribution
of each source population S separately.