Abstract
The Drosophila simulans per gene is polymorphic for the length of a repeat that encodes a series of Thr-Gly pairs. We have examined the circadian behaviour of flies derived from isofemale lines that carry the major variants, and find some significant differences in the way that the clock responds to temperature challenge, that might relate to the observed frequencies of these alleles in nature. We also observe that circadian thermal behaviour is also predictably influenced by subtle differences in the temperature of the locality from which these flies have been originally collected. There appear to be species-specific differences in the circadian locomotor patterns of D. melanogaster and D. simulans and in the way they may respond to temperature. Using chimeric per transgenes which carry the different species Thr-Gly fragments, we have been able to identify components of the behaviour that are modulated by this region of the PER protein.
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Rogers, A.S., Rosato, E., Costa, R., Kyriacou, C.P. (2004). Molecular analysis of circadian clocks in Drosophila simulans . In: Capy, P., Gibert, P., Boussy, I. (eds) Drosophila melanogaster, Drosophila simulans: So Similar, So Different. Contemporary Issues in Genetics and Evolution, vol 11. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0965-2_17
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DOI: https://doi.org/10.1007/978-94-007-0965-2_17
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