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. 2019 Nov 15;20:869. doi: 10.1186/s12864-019-6246-4

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© The Author(s). 2019

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 — Principal component analysis of the population structure in different regions of A. cerana. a Scatter plot of the main component 1 to 2 (PCA1 vs PCA2) from North China, Central China, and Hainan. b Scatter plot of the main component 1 to 2 (PCA1 vs. PCA2) from the 11 regions of LA, WC, LQ, MY, QD, RZ, HZ, QC, YY, ZZ, and WL (c) After removing the regions of RZ, ZZ, LQ, and QD, the RZ, ZZ, LQ, and QD regions were removed according to the sampling region in the scatter plot (d) of the main factor 1 and main factor 2. The main factor 1 and main factor 2 were passed according to the sampling region in the scatter plot