AffiliationDepartment of Ecology and Evolutionary Biology, University of Arizona
de novo genome assembly
genome size evolution
MetadataShow full item record
PublisherOxford University Press
CitationHeckenhauer, J., Frandsen, P. B., Sproul, J. S., Li, Z., Paule, J., Larracuente, A. M., Maughan, P. J., Barker, M. S., Schneider, J. V., Stewart, R. J., & Pauls, S. U. (2022). Genome size evolution in the diverse insect order Trichoptera. GigaScience.
RightsCopyright © The Author(s) 2022. Published by Oxford University Press GigaScience. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/).
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at email@example.com.
AbstractBackground: Genome size is implicated in the form, function, and ecological success of a species. Two principally different mechanisms are proposed as major drivers of eukaryotic genome evolution and diversity: polyploidy (i.e., whole-genome duplication) or smaller duplication events and bursts in the activity of repetitive elements. Here, we generated de novo genome assemblies of 17 caddisflies covering all major lineages of Trichoptera. Using these and previously sequenced genomes, we use caddisflies as a model for understanding genome size evolution in diverse insect lineages. Results: We detect a ∼14-fold variation in genome size across the order Trichoptera. We find strong evidence that repetitive element expansions, particularly those of transposable elements (TEs), are important drivers of large caddisfly genome sizes. Using an innovative method to examine TEs associated with universal single-copy orthologs (i.e., BUSCO genes), we find that TE expansions have a major impact on protein-coding gene regions, with TE-gene associations showing a linear relationship with increasing genome size. Intriguingly, we find that expanded genomes preferentially evolved in caddisfly clades with a higher ecological diversity (i.e., various feeding modes, diversification in variable, less stable environments). Conclusion: Our findings provide a platform to test hypotheses about the potential evolutionary roles of TE activity and TE-gene associations, particularly in groups with high species, ecological, and functional diversities. © 2022 The Author(s) 2022. Published by Oxford University Press GigaScience.
NoteOpen access journal
VersionFinal published version
Except where otherwise noted, this item's license is described as Copyright © The Author(s) 2022. Published by Oxford University Press GigaScience. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/).
- Draft Genome Assemblies and Annotations of Agrypnia vestita Walker, and Hesperophylax magnus Banks Reveal Substantial Repetitive Element Expansion in Tube Case-Making Caddisflies (Insecta: Trichoptera).
- Authors: Olsen LK, Heckenhauer J, Sproul JS, Dikow RB, Gonzalez VL, Kweskin MP, Taylor AM, Wilson SB, Stewart RJ, Zhou X, Holzenthal R, Pauls SU, Frandsen PB
- Issue date: 2021 Mar 1
- The genome of an underwater architect, the caddisfly Stenopsyche tienmushanensis Hwang (Insecta: Trichoptera).
- Authors: Luo S, Tang M, Frandsen PB, Stewart RJ, Zhou X
- Issue date: 2018 Dec 1
- Annotated Draft Genomes of Two Caddisfly Species Plectrocnemia conspersa CURTIS and Hydropsyche tenuis NAVAS (Insecta: Trichoptera).
- Authors: Heckenhauer J, Frandsen PB, Gupta DK, Paule J, Prost S, Schell T, Schneider JV, Stewart RJ, Pauls SU
- Issue date: 2019 Dec 1
- Diversity and evolution of the transposable element repertoire in arthropods with particular reference to insects.
- Authors: Petersen M, Armisén D, Gibbs RA, Hering L, Khila A, Mayer G, Richards S, Niehuis O, Misof B
- Issue date: 2019 Jan 9
- Multiple large-scale gene and genome duplications during the evolution of hexapods.
- Authors: Li Z, Tiley GP, Galuska SR, Reardon CR, Kidder TI, Rundell RJ, Barker MS
- Issue date: 2018 May 1
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