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. 2015 Oct 26;15:236. doi: 10.1186/s12866-015-0551-0

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© Yu et al. 2015

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. 2 — NJ tree and Ancestry of 119 Streptococcus thermophilus STs. a Neighbour-joining tree constructed from concatenated sequences of the 10 MLST loci. Bootstrap values are indicated for all branches. STs are colored according to their affiliation to one of the six ancestral subpopulations; admixed STs are in black. b Sources of ancestry of each unique ST from six ancestral subpopulations by Structure (assuming K = 6 populations and applying the linkage model). Six ancestral subpopulations are colored in Green (subpopulations 1), yellow (subpopulations 2), pink (subpopulations 3), blue (subpopulations 4), red (subpopulations 5) and orange (subpopulations 6). Each ST is represented by a single line with the ST designation at the top consisting of colored stacked bars that indicate the proportion of ancestry from each of six subpopulations