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. 2013 Feb 21;5(3):542–558. doi: 10.1093/gbe/evt027

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© The Author(s) 2013. 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 unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 3.— — Detection of positively selected sites in the three main S. meliloti replicons. (a) The proportion of positively selected sites detected with respect to the total number of genes present in each replicon is reported. Asterisks indicate significant enrichment (P < 0.05 with a Fisher’s exact test) of positively selected genes. (b) Difference between relative proportions of each COG category between selected and nonselected core genes. Solid borders indicate a significant difference (P < 0.05 with a Fisher’s exact test). See http://www.ncbi.nlm.nih.gov/COG/grace/fiew.cgi for the list of COG codes.