TABLE 1.

Prior distributions of simulated parameters

				Quantiles
Parameters	Distribution	Mean	Mode	5%	50%	95%
N0, N1, N2, NA	Log Uniform[100, 40,000]	6,690	100	135	1,993	29,676
λ	Uniform[0, 1]	0.500	IR	0.05	0.500	0.950
tADM	Log Uniform[1, 1,000]	143	1	1.4	30.8	704
tDIV	Log Uniform[100, 100,000]	14,540	100	141	3,170	70,942
	Log Uniform[10−4, 5 × 10−3]	1.3 × 10−3	10−4	1.2 × 10−4	7.1 × 10−4	4.1 × 10−3
μi	Gamma(2, 2/)	1.3 × 10−3	1.7 × 10−4	5.6 × 10−5	5.5 × 10−4	4.9 × 10−3
	Uniform[0, 0.5]	0.250	IR	0.025	0.250	0.475
Pi	Beta(a, b)*	0.250	IR	0.023	0.250	0.482

N₀, N₁, N₂, and N_A, effective population size (number of gene copies) in ancestral (N₀), parental (N₁ and N₂), and admixed (N_A) populations, respectively; λ, contribution of parental population 1 to the admixed population; t_ADM, time since admixture; t_DIV, divergence time between parental populations before admixture; and μ_i, average and individual-locus mutation rates, respectively; and P_i, average and individual-locus parameters of the geometric distribution of the GSM, respectively; *Prior distribution for P_i is as follows: if ≥ 0.001 then P = Beta(a, b) with a = 0.5 + 199 and b = a(1 − )/; otherwise P = 0. IR, irrelevant.