Fig. 1

The presumptive wing-patterning network in Drosophila [24, 26]. The aphid orthologs of these Drosophila genes were examined in this study. Abbreviations: en, engrailed; hh, hedgehog; dpp, decapentaplegic; brk, brinker; omb, optomoter-blind; sal, spalt-major; Ubx, ultrabithorax; sd, scalloped; vg, vestigial; ap, apterous; ser, serrate; dl, delta; N, notch; su (h), suppressor of hairless; wg, wingless; dll, distalless; hth, homothorax; srf, serum response factor; exd, extradenticle. Dashed lines indicate regulatory interactions specific to the hindwing disc. Arrowheads and bars indicate activation and repression, respectively