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. 2021 Jun 3;4:671. doi: 10.1038/s42003-021-02152-8

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — K_S age distributions for anchor pairs of L. barbarum (green histogram; left hand y-axis; a peak represents an ancient polyploid event) and for one-to-one orthologues between L. barbarum and S. lycopersicum, N. tabacum, P. axillaris, I. nil, and an outgroup species C. canephora (colored filled curves of kernel-density estimates; a peak represents a species divergence event). The gray rectangles highlight the peak found in the anchor pair K_S distributions with a range of 0.4–1.0.