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. 2012 Jun 22;5:12. doi: 10.1186/1939-8433-5-12

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© Liu et al.; licensee Springer. 2012

This article is published under license to 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 cited.

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Chromosomal location, duplication event, and evolutionary stage schematic for OsOPT genes. Chromosome numbers are indicated at the bottom of each bar. The OsOPT genes represented by duplicated chromosomal segments between two chromosomes were connected by lines and the OsOPT genes that resulted from tandem duplication were contained in boxes. The OsOPT genes originating from the first evolutionary stage were shown in red, the OsOPT genes derived from the second evolutionary stage were shown in green, and the OsOPT genes derived from the third evolution stage were shown in blue.