Adaptation to different host taxa is a key driver of insect diversification. Herbivorous insects are classic models for ecological and evolutionary research, but it is recent advances in sequencing, statistics, and molecular technologies that have cleared the way for investigations into the proximate genetic mechanisms underlying host shifts. In this review, we discuss how genome-scale data are revealing—at resolutions previously unimaginable—the genetic architecture of host-use traits, the causal loci underlying host shifts, and the predictability of host-use evolution. Collectively, these studies are providing novel insights into longstanding questions about host-use evolution. On the basis of this synthesis, we suggest that different host-use traits are likely to differ in their genetic architecture (number of causal loci and the nature of their genetic correlations) and genetic predictability (extent of gene or mutation reuse), indicating that any conclusions about the causes and consequences of host-use evolution will depend heavily on which host-use traits are investigated. To draw robust conclusions and identify general patterns in host-use evolution, we argue that investigation of diverse host-use traits and identification of causal genes and mutations should be the top priorities for future studies on the evolutionary genetics of host shifts.
|Number of pages||27|
|Journal||Annals of the New York Academy of Sciences|
|State||Published - Feb 1 2017|
Bibliographical noteFunding Information:
We would like to thank Aaron Comeault, Zach Gompert, members of the Linnen lab, and one anonymous reviewer for constructive comments on earlier versions of this manuscript. Work in the Linnen laboratory is supported by the NSF (DEB-1257739), the USDA-NIFA (2016-67014-2475), and a Grant from the Kentucky Science and Engineering Foundation as per Grant Agreement #KSEF-3492-RDE-019 with the Kentucky Science and Technology Corporation.
© 2017 New York Academy of Sciences.
- evolutionary genomics
- genetic architecture
- genetic convergence
- genetics of host use
- host adaptation
ASJC Scopus subject areas
- Neuroscience (all)
- Biochemistry, Genetics and Molecular Biology (all)
- History and Philosophy of Science