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. 2019 Sep 27;10:1109. doi: 10.3389/fpls.2019.01109

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Copyright © 2019 Li, Hu, Dou, Qi, Long, Zou, Lei, Yao, He and Chen

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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Chromosomal loci and duplications hot spots of CsXTH genes. (A) Chromosomal locations and duplications of CsXTH and CsEG16 genes. The map was visualized by MapChart 2.1, and the concentration of CsXTH genes (number of CsXTHs per Mb) are written above each chart. Gene orientations are shown in nearby triangles. (B) Maximum-likelihood phylogeny of duplicated CsXTH genes on chromosome 4 (MEGA 7, bootstrap = 500). (C) Comparison of two duplicated segments. Gene sizes and intervals are to scale. Start and stop positions of the duplicated segments were written on the top and bottom of the segments. Gene orientations are shown with triangles on the left and right. Homologous genes are shown in the same color on the two duplicated segments. (D) Model for the evolutionary history of the two duplicated segments. a, b, and c represent ancestral genes during the evolution process. 07–17 represent CsXTH07–CsXTH17, respectively.