Table 2.

Accuracy of inferring hybrid individuals using the PD’s aAIMs. The six parental populations and the number of hybrid individuals generated from them are shown. Each hybrid was represented by three datasets: CSS, PD aAIMs, and a random SNP set. The mean genetic distances (d) between the admixture components of these datasets per population are shown. Short distances indicate high genetic similarity.

Parental Population A	Parental Population B	# Hybrids	$\overline{\mathit{d}\left(\mathbf{CSS}, \mathbf{PD}\right)}$	$\overline{\mathit{d}\left(\mathbf{CSS}, \mathit{r}\mathit{a}\mathit{n}\mathit{d}\mathit{o}\mathit{m} \mathit{s}\mathit{e}\mathit{t}\right)}$	$\overline{\mathit{d}\left(\mathbf{PD}, \mathit{r}\mathit{a}\mathit{n}\mathit{d}\mathit{o}\mathit{m} \mathit{s}\mathit{e}\mathit{t}\right)}$
Britain Iron Saxon	Britain Iron Saxon	6	0.026	0.212	0.208
Britain Iron Saxon	Russia Late Chalcolithic	9	0.009	0.610	0.601
Britain Iron Saxon	Sweden Mesolithic	9	0.051	0.344	0.337
Britain Iron Saxon	Turkey Neolithic	9	0.003	0.428	0.431
Britain Iron Saxon	Spain Early Neolithic	9	0.108	0.221	0.241
Russia Late Chalcolithic	Russia Late Chalcolithic	6	0.009	0.443	0.448
Russia Late Chalcolithic	Sweden Mesolithic	9	0.062	0.578	0.561
Russia Late Chalcolithic	Turkey Neolithic	9	0.063	0.661	0.633
Russia Late Chalcolithic	Spain Early Neolithic	9	0.101	0.520	0.491
Sweden Mesolithic	Sweden Mesolithic	6	0.000	0.384	0.384
Sweden Mesolithic	Turkey Neolithic	9	0.055	0.567	0.522
Spain Early Neolithic	Sweden Mesolithic	9	0.108	0.402	0.377
Turkey Neolithic	Turkey Neolithic	6	0.001	0.627	0.626
Spain Early Neolithic	Turkey Neolithic	9	0.092	0.483	0.493
Spain Early Neolithic	Spain Early Neolithic	6	0.041	0.197	0.172

CSS: Complete single nucleotide polymorphism (SNP) set; PD: Principal component analysis (PCA)-derived.