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. 2017 Feb 6;17:40. doi: 10.1186/s12862-017-0895-1

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Different protein functions show different patterns of evolution before and after WGD. a Fraction of orthogroups for which the alternative hypothesis (ω₀ ≠ ω_wgd) is accepted; plot shows data for all orthogroups and different functional categories. Functional categories which are enriched or depleted in ω-change orthogroups are shown (**p < 0.01 and ***p < 0.001, χ ² test). b Cumulative distribution plots of the dN/dS ratios for three different functional categories. Gray lines (all genes) and circles (specific function) show the pre-duplication dN/dS ratios; black lines and circles indicate post-duplication ratios