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. 2022 Feb 15;13:826158. doi: 10.3389/fpls.2022.826158

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Copyright © 2022 Torre, Sebastiani, Burbui, Pecori, Pepori, Passeri, Ghelardini, Selvaggi and Santini.

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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Bayesian Skyline plots derived from cpDNA sequences of Ulmus laevis. The analysis was performed for each population separately. The X-axis is in units of million years ago (Mya) and the Y-axis is the population size, expressed in units of Neτ, the product of effective population sizes per generation length. The thick solid line represents the mean effective population size N_e, while the 95% highest posterior density (HPD) limits are shown by the blue area. (A) France_NE, (B) France_SW, (C) Italy, and (D) Serbia.