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Weak population genetic structure in Eurasian spruce bark beetle over large regional scales in Sweden2.21 MB
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Journal article
Weak population genetic structure in Eurasian spruce bark beetle over large regional scales in Sweden
Ecology and Evolution, Vol.12(7), pp.1-12
2022
Abstract
The Eurasian spruce bark beetle, Ips typographus, is a major pest, capable of killing spruce forests during large population outbreaks. Recorded dispersal distances of individual beetles are typically within hundreds of meters or a few kilometers. However, the connectivity between populations at larger distances and longer time spans and how this is affected by the habitat is less studied, despite its importance for understanding at which distances local outbreaks may spread. Previous population genetic studies in I. typographus typically used low resolution markers. Here, we use genome-wide data to assess population structure and connectivity of I. typographus in Sweden. We used 152 individuals from 19 population samples, distributed over 830 km from Strömsund (63° 46′ 8″ N) in the north to Nyteboda (56° 8′ 50″ N) in the south, to capture processes at a large regional scale, and a transect sampling design adjacent to a recent outbreak to capture processes at a smaller scale (76 km). Using restriction site-associated DNA sequencing (RADseq) markers capturing 1409– 1997 SNPs throughout the genome, we document a weak genetic structure over the large scale, potentially indicative of high connectivity with extensive gene flow. No differentiation was detected at the smaller scale. We find indications of isolation-by-distance both for relative (F ST) and absolute divergence (Dxy). The two northernmost populations are most differentiated from the remaining populations, and diverge in parallel to the southern populations for a set of outlier loci. In conclusion, the population structure of I. typographus in Sweden is weak, suggesting a high capacity to disperse and establish outbreak populations in new territories.
Details
- Title
- Weak population genetic structure in Eurasian spruce bark beetle over large regional scales in Sweden
- Authors
- Simon Jacobsen Ellerstrand (Author) - Lund UniversityShruti Choudhury (Author) - Lund UniversityKajsa Svensson (Author) - Lund UniversityMartin N Andersson (Author) - Lund UniversityCarsten Kirkeby (Author) - Czech University of Life Sciences PragueDaniel Powell (Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringFredrik Schlyter (Author) - Czech University of Life Sciences PragueAnna Maria Jönsson (Author) - Lund UniversityMikkel Brydegaard (Author) - Lund UniversityBengt Hansson (Author) - Lund UniversityAnna Runemark (Corresponding Author) - Lund University
- Publication details
- Ecology and Evolution, Vol.12(7), pp.1-12
- Publisher
- John Wiley & Sons Ltd.
- Date published
- 2022
- DOI
- 10.1002/ece3.9078
- ISSN
- 2045-7758
- Copyright note
- © 2022 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
- Organisation Unit
- University of the Sunshine Coast, Queensland; Office of Research; School of Science, Technology and Engineering; Centre for Bioinnovation
- Language
- English
- Record Identifier
- 99655797902621
- Output Type
- Journal article
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