Figure 1.

Gene collinearity across the genus Oryza. Orthologous genes in the Sh4 regions of AA, BB, BBCC and CC were aligned with each other. The genome structure is well-conserved between each subgenome of allotetraploid and its counterpart diploid. Ten tandemly duplicated gene clusters were found within this region and four putative pseudogenes were identified. The green bars represent single copy genes in this genomic region, the black bars represent the Sh4 gene, the other colored bars represent tandemly repeat genes and the red arrows indicate pseudogenes.