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. 2018 May 25;18:75. doi: 10.1186/s12862-018-1194-1

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© The Author(s). 2018

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 — Geographical distributions and network of the cpDNA haplotypes in Populus euphratica (black cycle) and P. pruinosa (red cycle) populations. All lines joining haplotypes represent only one substitution or indels mutation, except the line between H04 and H06, which represents two substitutions. The map was created using the ArcMap package in ArcGIS ver. 9.2 (http://www.esri.com/software/arcgis)