Genomic evidence for contrasting patterns of host-associated genetic differentiation across shared host-plant species in leaf- and bud-galling sawflies
Name:
Molecular Ecology - 2023 - Michell - Genomic evidence for contrasting patterns of host‐associated genetic differentiation.pdf
Size:
2.862Mb
Format:
PDF
Description:
Accepted Manuscript
Embargo End Date:
2024-01-10
Name:
mec16844-sup-0001-supinfo.pdf
Size:
2.352Mb
Format:
PDF
Description:
Supplementary material
Embargo End Date:
2024-01-10
Type
ArticleKAUST Department
Red Sea Research Center (RSRC)Biological and Environmental Science and Engineering (BESE) Division
Date
2023-01-10Embargo End Date
2024-01-10Permanent link to this record
http://hdl.handle.net/10754/686983
Metadata
Show full item recordAbstract
Resource specialization and ecological speciation arising through host-associated genetic differentiation (HAD) are frequently invoked as an explanation for the high diversity of plant-feeding insects and other organisms with a parasitic lifestyle. While genetic studies have demonstrated numerous examples of HAD in insect herbivores, the rarity of comparative studies means that we still lack an understanding of how deterministic HAD is, and whether patterns of host shifts can be predicted over evolutionary time scales. We applied genome-wide SNP and mtDNA sequence data obtained through genome resequencing to define species limits and to compare host-plant use in population samples of leaf- and bud-galling sawflies (Hymenoptera: Tenthredinidae: Nematinae) collected from seven shared willow (Salicaceae: Salix) host species. To infer the repeatability of long-term cophylogenetic patterns, we also contrasted the phylogenies of the two galler groups with each other as well as with the phylogeny of their Salix hosts estimated based on RADseq data. We found clear evidence for host specialization and HAD in both of the focal galler groups, but also that leaf gallers are more specialized to single host species than are most bud gallers. In contrast to bud gallers, leaf gallers also exhibited statistically significant cophylogenetic signal with their Salix hosts. The observed discordant patterns of resource specialization and host shifts in two related galler groups that have radiated in parallel across a shared resource base indicate a lack of evolutionary repeatability in the focal system, and suggest that short- and long-term host use and ecological diversification in plant-feeding insects are dominated by stochasticity and/or lineage-specific effects.Citation
Michell, C. T., Wagner, N., Mutanen, M., Lee, K. M., & Nyman, T. (2023). Genomic evidence for contrasting patterns of host-associated genetic differentiation across shared host-plant species in leaf- and bud-galling sawflies. Molecular Ecology. Portico. https://doi.org/10.1111/mec.16844Sponsors
Funding for this study was provided by the Academy of Finland (Project 294466 to TN).Computation-intensive bioinformatic and statistical analyses were performed on the servers of the Finnish Centre for Scientific Computing (www.csc.fi). Jens-Peter Kopelke kindly provided photographs of bud galls on S. myrsinifolia and S. hastata. This manuscript benefited from discussions with Catherine Linnen and P hillip Watts, as well as from suggestions provided by six anonymous reviewers.Publisher
WileyJournal
Molecular EcologyPubMed ID
36626108Additional Links
https://onlinelibrary.wiley.com/doi/10.1111/mec.16844ae974a485f413a2113503eed53cd6c53
10.1111/mec.16844
Scopus Count
Related articles
- A comparative analysis of genetic differentiation across six shared willow host species in leaf- and bud-galling sawflies.
- Authors: Leppänen SA, Malm T, Värri K, Nyman T
- Issue date: 2014
- Gall-induction in insects: evolutionary dead-end or speciation driver?
- Authors: Hardy NB, Cook LG
- Issue date: 2010 Aug 25
- EVOLUTION OF DIFFERENT GALL TYPES IN WILLOW-FEEDING SAWFLIES (HYMENOPTERA: TENTHREDINIDAE).
- Authors: Nyman T, Roininen H, Vuorinen JA
- Issue date: 1998 Apr
- Phylogenetics and evolution of host-plant use in leaf-mining sawflies (Hymenoptera: Tenthredinidae: Heterarthrinae).
- Authors: Leppänen SA, Altenhofer E, Liston AD, Nyman T
- Issue date: 2012 Aug
- Determinants of parasitoid communities of willow-galling sawflies: habitat overrides physiology, host plant and space.
- Authors: Nyman T, Leppänen SA, Várkonyi G, Shaw MR, Koivisto R, Barstad TE, Vikberg V, Roininen H
- Issue date: 2015 Oct