Additional file 1.

Phylogenetic tree of the five Oryza species used in this study: Oj, O. sativa L. ssp. japonica; Oi, O. sativa L. ssp. indica; On, O. nivara; Or, O. rufipogon; and Og, O. glaberrima. We used (A) the neighbour-joining and (B) the maximum-likelihood methods using the third positions of 15,053 codons. We used Kimura's two-parameter method for the neighbour-joining tree. Bootstrap values are shown above the internal branches. The scale indicates the branch length.

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Sakai and Itoh BMC Genomics 2010 11:121   doi:10.1186/1471-2164-11-121