title: Population differences in olfaction accompany host shift in Drosophila mojavensis.
abstract: Evolutionary shifts in plant-herbivore interactions provide a model for understanding the link among the evolution of behaviour, ecological specialization and incipient speciation. Drosophila mojavensis uses different host cacti across its range, and volatile chemicals emitted by the host are the primary cue for host plant identification. In this study, we show that changes in host plant use between distinct D. mojavensis populations are accompanied by changes in the olfactory system. Specifically, we observe differences in olfactory receptor neuron specificity and sensitivity, as well as changes in sensillar subtype abundance, between populations. Additionally, RNA-seq analyses reveal differential gene expression between populations for members of the odorant receptor gene family. Hence, alterations in host preference are associated with changes in development, regulation and function at the olfactory periphery.
authors: Department of Biological Sciences, University of Cincinnati, Cincinnati, OH 45221, USA.
authors: Amber
authors: A
authors: Crowley-Gall
authors: Department of Biological Sciences, University of Cincinnati, Cincinnati, OH 45221, USA.
authors: Priya
authors: P
authors: Date
authors: Lewis Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA.
authors: Clair
authors: C
authors: Han
authors: Department of Biological Sciences, University of Cincinnati, Cincinnati, OH 45221, USA.
authors: Nicole
authors: N
authors: Rhodes
authors: Lewis Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA.
authors: Peter
authors: P
authors: Andolfatto
authors: Department of Biological Sciences, University of Cincinnati, Cincinnati, OH 45221, USA.
authors: John E
authors: JE
authors: Layne
authors: Department of Biological Sciences, University of Cincinnati, Cincinnati, OH 45221, USA stephanie.rollmann@uc.edu.
authors: Stephanie M
authors: 0000-0003-4552-5647
authors: SM
authors: Rollmann
mesh_terms: D000818:Animals; D029421:Cactaceae; D004330:Drosophila / Q000235:genetics / Q000502:physiology*; D005828:Genetics, Population; D018035:Receptors, Odorant / Q000235:genetics*; D012903:Smell
chemical_list: D018035:Receptors, Odorant
keywords: chemosensory; evolution; neurophysiology; olfaction; speciation