Figure 4

Map of the D. virilis (Dv) dot chromosome contigs in relation to the dot chromosome of D. melanogaster (Dm). Shown at the bottom is a map of the genes on the D. melanogaster dot chromosome. Colored bars with labels represent genes for which we have identified a (complete or partial) homologue in the D. virilis fosmids sequenced. Colored boxes above the scale bar are schematic (not to scale) representations of the D. virilis contigs. Immediately above the scale bar is a representation of those sequenced contigs that contain syntenic regions from D. virilis, where genes are in the same order and orientation as in D. melanogaster. In the uppermost portion of the figure are the contigs mapping to the D. virilis dot chromosome that are rearranged with respect to the D. melanogaster dot chromosome. Boxes are color-coded to represent the genes present in the contig, with dashed lines connecting to show the extent of rearrangement. Notably, contig 30 contains both pan and Caps, which lie on opposite sides of the banded portion of the D. melanogaster dot chromosome.