Fig. 3.

Promoter sequence diversity analysis in rice and fruit flies. a Schematic represenation of rice chromosome with illustration of SNP-free conserved region (CR) identification. Red box denotes 1 kb upstream of annotated genes from Chr1 in the Oryza sativa Nipponbare genome. b Number of conserved regions versus size is shown for all SNP-free conserved sequences in promoter regions of Chr1 (top, n = 65,500 CRs). Also shown are targetable CRs (defined as those larger than 30 bp) per promoter region (middle, n = 4487 genes), and the relative position of these targetable sequences relative to the start of the annotated gene (’0’) (bottom). c Equivalent data as in b, but for chromosome 2L from Drosophila melanogaster. (Total CRs in top panel = 215,705, total genes in middle panel = 3486). Spike at x = 1 for middle histograms is partially due to the counting of SNP-less promoters (entire 1 kb with no SNPs) as having a single CR