An amino acid polymorphism in the couch potato gene forms the basis for climatic adaptation in Drosophila melanogaster
Most organisms are faced with dealing with seasonal variations in environmental conditions. As winter approaches, physiological changes need to be implemented: deciduous trees drop their leaves, mammals may hibernate, and so forth. In the case of many insects, the strategy is to move into a diapause state. This may be in any of the life stages - pupal diapause, larval diapause etc, and in the case of Drosophila melanogaster reproductive diapause, in which ovarian activity is shut down in response to a combination of short day length and low temperature. My interests in diapause are two-fold in origin: firstly, diapause appears to have an impact on lifespan in Drosophila, and secondly, my father identified the existence of reproductive diapause in Drosophila back in 1989.