Heatmap of the distribution of sequenced sugarcane BACs on sorghum chromosomes. The depth of the blue colour indicates the number of BACs localized per 10 Mb. Horizontal red lines show the location of BACs selected using probes based on eight linkage groups . Horizontal black lines show the location of BACs that overlap with at least one gene. Numbers above the black bars indicate the number of BACs that overlap at that point.