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. Author manuscript; available in PMC: 2017 Dec 1.
Published in final edited form as: Curr Opin Genet Dev. 2016 Sep 20;41:98–105. doi: 10.1016/j.gde.2016.08.007

Figure 2. A large number of loci is required to reveal fine-scale population structure using PCA.

Figure 2

Four subsamples with an increasing number of loci were taken from the[93] dataset. Using 100 loci, Europe appears panmictic, whereas 1,000 loci are sufficient to establish a North-South cline. With 10,000 and 100,000 loci, fine-scale details are revealed.