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. 2017 Feb 20;18:33. doi: 10.1186/s13059-017-1167-5

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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. 1 — Phylogenetic relationships of 147 cotton accessions. a A neighbor-joining tree was constructed using whole-genome SNP data. The cotton samples were divided into G. hirsutum races (orange), G. hirsutum cultivars (green), G. barbadense cultivars (dark blue) and outgroup species (light blue). b Population structure of cotton accessions determined using STRUCTURE. The accessions were divided into three groups when K = 3. c Principal component analysis of all cotton accessions using whole-genome SNP data. d Phylogenetic relationships between G. hirsutum cultivars and races. e Phylogenetic relationships between G. barbadense landraces and cultivars. The scale bar indicates the simple matching distance