Figure 1.

Schematic of the mechanistic model of admixture. Two source populations, S₁ and S₂, contribute both males and females to the next generation of the hybrid population H, potentially with time-varying proportions. The fractional contributions of the source populations and the hybrid population to the next generation g are $s_{1,g},s_{2,g}$, and h_g, respectively. Sex-specific contributions from the populations are $s_{1,g}^{\text{f}}$, $s_{2,g}^{\text{f}}$, and $s_{1,g}^{\text{m}}$, $s_{2,g}^{\text{m}},$ for females and males respectively. H_α,g,δ represents the fraction of admixture from source population α ∈ {1, 2} in generation g for a random individual of sex δ ∈ {f, m} in population H.