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. 2023 Mar 1;12(5):1113. doi: 10.3390/plants12051113

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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A comparison of morphological traits of different geo-cytotype populations. (a) The ratio of length to width, (b) ratio of height to stem diameter, (c) cluster analysis based on 11 phenotypic traits. CN represents the population of China, EU represents the population of Europe, JP represents the population of Japan, NA represents the population of North America, and RUS represents the population of Russia; S. altissima includes populations of North America and Japan. Different lowercase letters indicate significance.