DlA326.2F3/DlRF flies show heat sensitive increases in the severity of Dl mutant wing venation phenotypes. At 18oC the wing veins show mild deltas. Flies pulsed for 8 hours at times equivalent to 20 to 30 hours APF at 250C, display thickened veins and marginal deltas larger than those of animals raised at 18oC.
W. Gehring.