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. 2012 Oct 27;30(2):435–447. doi: 10.1093/molbev/mss246

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© The Author(s) 2012. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 3. — Histograms of the observed synonymous diversity measures per base pair for the 12 S-locus flanking genes in Arabidopsis halleri (A and B) and A. lyrata (C and D) and their expected distribution obtained from coalescent simulations under the null hypothesis of no linkage to selected sites. Synonymous polymorphism was estimated by both the nucleotide diversity π (A and C) and Watterson's θ_w (B and D). Shaded boxes indicate the one-tailed 95% confidence intervals for each locus, obtained by simulations. Solid dots indicate the observed values. Thick horizontal lines indicate the median of each distribution.