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. 2009 Dec 1;4(12):e7928. doi: 10.1371/journal.pone.0007928

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Zhang et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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The ancestral population structure detected by PCA (top) and by Laplacian with (bottom), for the admixed population with two ancestral populations, where crosses (circles) stand for individuals whose ancestry proportion from ancestral population 1 is larger (smaller) than one-half.

Inline graphic — The ancestral population structure detected by PCA (top) and by Laplacian with (bottom), for the admixed population with two ancestral populations, where crosses (circles) stand for individuals whose ancestry proportion from ancestral population 1 is larger (smaller) than one-half.