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. 2014 Apr 11;15:45. doi: 10.1186/1471-2156-15-45

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Copyright © 2014 Huang et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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The phylogenic trees of Avr-genes. In this Figure, each tree represents the phylogenetic relationship of one AVR gene. The colored shape indicates the origin of the strain, and the number of strains is labeled behind the shape if there are more than one member at the the same position. In the tree of PWL2, there are only two kinds of alleles. One of them is the wild type, which is intoxical, while the other is inefficient and toxical.