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. 2018 Oct 25;9:1534. doi: 10.3389/fpls.2018.01534

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Copyright © 2018 Yang, Vázquez, Feng, Liu and Zhao.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Genetic structure and climatic distributions among populations of Quercus liaotungensis. Genetic relationships of individuals (A) and populations (B) indicate consistent population structures for Q. liaotungensis. Climatic distributions of temperature and precipitation seasonality (C,D) using two-dimensional kernel density estimation show distinct ecological adaptation among populations from Cluster 1 and Cluster 2. Blue squares and branches represent individuals and populations of Cluster 1, while orange squares and branches indicate individuals and populations from Cluster 2. Red color in climatic distributions indicates climatic regions with the highest density of populations from each cluster.