Figure 5

Schematic summary of Glomeris pair rule gene expression patterns in dorsal and ventral segments. Segmental expression of PRG orthologs in young (A, B) and older (C, D) segments. (B) and (D) represent ventral segments, (A) and (C) represent dorsal segments. The genes are denoted in different colors and patterns and are explained in the legend below the drawings. Note that expression of the primary PRGs eve and run is present in the nascent segments, but absent from older segments, both in ventral and dorsal tissue. The patterning of dorsal and ventral segments is very different at the level of the PRGs. Some genes are exclusively expressed in dorsal or ventral segments, respectively (for example, odd, pby1, opa). Other genes are expressed in both ventral and dorsal segments, but show differences in their temporal expression profile or their intrasegmental position (for example, eve, run, h1). These results support earlier results that suggested a decoupling between dorsal and ventral segments, and indicate that this decoupling is already present at the level of the PRGs. Abbreviations: en, engrailed; eve, even-skipped; h1, hairy1; odd, odd-skipped; pby1, pairberry1; run, runt; slp, sloppy-paired; wg, wingless.