decapentaplegic (dpp) is a zygotically expressed gene encoding a member of transforming growth factor-beta (TGF-beta) superfamily, which is most similar to the bone morphogenetic proteins (BMPs). dpp is required for several events including embryonic dorsal-ventral pattern formation, embryonic midgut development and proliferation of imaginal disk cells. We have used hobo enhancer trapping to identify other genes involved in this process. Genetic characterization of this enhancer trapping lines will be presented.