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. Author manuscript; available in PMC: 2010 Jul 1.
Published in final edited form as: Nat Genet. 2009 Dec 6;42(1):62–67. doi: 10.1038/ng.495

Figure 4. Principal component plot for the most differentially expressed genes.

Figure 4

The two major principal components of the expression of the 1,500 most significant genes shows significant separation of individuals by location (PC1 and PC2) and gender (PC2) (all P < 0.0001) as described in the text. Individuals from Boutroch are blue, Ighrem red, and Agadir green. Arabs are indicated with solid spots, Amazigh open circles, and males are lighter symbols for each color. Boutroch and Arab women from Ighrem (clusters 1 and 2) separate from Amazigh women and Arab men from Ighrem (clusters 3 and 4) who are closer to Agadir residents. If Boutroch residents and Ighrem Arab women are grouped and contrasted with Agadir residents, Ighrem Amazigh women, and Ighrem men, 8,239 genes are significantly differentially expressed at the 1% FDR rate, more than any pair-wise comparison of locations. A similar plot for all genes is shown in Supplementary Figure 11.

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