Population differences in olfaction accompany host shift in Drosophila mojavensis

Amber Crowley-Gall, Priya Date, Clair Han, Nicole Rhodes, Peter Andolfatto, John E. Layne, Stephanie M. Rollmann

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


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.

Original languageEnglish (US)
Article number20161562
JournalProceedings of the Royal Society B: Biological Sciences
Issue number1837
StatePublished - Aug 31 2016

All Science Journal Classification (ASJC) codes

  • General Immunology and Microbiology
  • General Environmental Science
  • General Biochemistry, Genetics and Molecular Biology
  • General Agricultural and Biological Sciences


  • Chemosensory
  • Evolution
  • Neurophysiology
  • Olfaction
  • Speciation


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