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. 2021 May 13;12:661635. doi: 10.3389/fpls.2021.661635

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Copyright © 2021 Zhao, Chen, Liu, Song and Zhang.

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 distribution of PtoNRT genes and collinearity analysis between poplar and Arabidopsis. (A) Chromosomal distribution of PtoNRT genes. The TBtools genome visualization tool was used to illustrate the chromosomal distribution of PtoNRT genes. The chromosome number is shown to the left of each chromosome. The chromosomal location of each PtoNRT is presented from the top to the bottom of the corresponding chromosome. The scale bar beside each chromosome indicates the length in megabases (bp). (B) Collinearity analysis between poplar and Arabidopsis. The five chromosomes of Arabidopsis are shown at the top, and the 19 chromosomes of P. tomentosa are at the bottom. Members of the NRT gene family are marked with red lines.