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. 2015 Apr 24;10(4):e0124669. doi: 10.1371/journal.pone.0124669

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© 2015 Tian et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 2 — Nineteen Populus chromosomes (chr01-chr19) are depicted as grey bars. Chromosome numbers are indicated in centers of each bar. Populus ALDH genes are indicated by vertical black lines outer the circles. Duplicate pairs formed by whole or segmental genome duplication are connected by black lines. Grey lines connected between chromosomes denote syntenic regions of the Populus genome.