Flies expressing Spn27AdsRNA.Scer\UAS under the control of Scer\GAL4da.G32 undergo spontaneous tracheal melanization.
Scer\GAL4da.G32, Spn27ARNAi.UAS has tracheal section phenotype, suppressible by Hayan1
A Hayan1 mutant background completely suppresses the spontaneous tracheal melanization seen when Spn27AdsRNA.Scer\UAS is expressed under the control of Scer\GAL4da.G32.