Fig. 3. Rice–rice synteny. This Oxford grid displays the homologous sequences within the rice genome plotted by the physical locations. In the upper-right half of the grid all homologous sequences within the rice gene models are plotted by their locations. Enlarged dots identify the syntenic regions. The lower-left portion of the grid displays the 16 identified syntenic regions which are labeled by the ancestral rice block (ARB) that represents them. Syntenic regions that have significance (P < 0.05) are colored red, while syntenic regions that had P values greater than 0.05 are green. ARB 17 is not displayed because it is a composite of the remaining nonduplicated regions not incorporated into ARBs 1–16.