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Dogantzis KA, Raffiudin R, Putra RE, Shaleh I, Conflitti IM, Pepinelli M, Roberts J, Holmes M, Oldroyd BP, Zayed A, Gloag R. Post-invasion selection acts on standing genetic variation despite a severe founding bottleneck. Curr Biol 2024; 34:1349-1356.e4. [PMID: 38428415 DOI: 10.1016/j.cub.2024.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 12/12/2023] [Accepted: 02/06/2024] [Indexed: 03/03/2024]
Abstract
Invasive populations often have lower genetic diversity relative to the native-range populations from which they derive.1,2 Despite this, many biological invaders succeed in their new environments, in part due to rapid adaptation.3,4,5,6 Therefore, the role of genetic bottlenecks in constraining the adaptation of invaders is debated.7,8,9,10 Here, we use whole-genome resequencing of samples from a 10-year time-series dataset, representing the natural invasion of the Asian honey bee (Apis cerana) in Australia, to investigate natural selection occurring in the aftermath of a founding event. We find that Australia's A. cerana population was founded by as few as one colony, whose arrival was followed by a period of rapid population expansion associated with an increase of rare variants.11 The bottleneck resulted in a steep loss of overall genetic diversity, yet we nevertheless detected loci with signatures of positive selection during the first years post-invasion. When we investigated the origin of alleles under selection, we found that selection acted primarily on the variation introduced by founders and not on the variants that arose post-invasion by mutation. In all, our data highlight that selection on standing genetic variation can occur in the early years post-invasion, even where founding bottlenecks are severe.
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Affiliation(s)
- Kathleen A Dogantzis
- York University, Department of Biology, 4700 Keele Street, Toronto, ON M3J 1P3, Canada
| | - Rika Raffiudin
- IPB University, Department of Biology, Faculty of Mathematics and Natural Sciences, Bogor 16680, Indonesia
| | - Ramadhani Eka Putra
- Bandung Institute of Technology, School of Life Sciences and Technology, Bandung 40132, West Java, Indonesia
| | - Ismail Shaleh
- IPB University, Department of Biology, Faculty of Mathematics and Natural Sciences, Bogor 16680, Indonesia
| | - Ida M Conflitti
- York University, Department of Biology, 4700 Keele Street, Toronto, ON M3J 1P3, Canada
| | - Mateus Pepinelli
- York University, Department of Biology, 4700 Keele Street, Toronto, ON M3J 1P3, Canada
| | - John Roberts
- Commonwealth Scientific and Industrial Research Organisation, Canberra, ACT 2601, Australia
| | - Michael Holmes
- University of Sydney, School of Life and Environmental Sciences, Sydney, NSW 2006, Australia
| | - Benjamin P Oldroyd
- University of Sydney, School of Life and Environmental Sciences, Sydney, NSW 2006, Australia
| | - Amro Zayed
- York University, Department of Biology, 4700 Keele Street, Toronto, ON M3J 1P3, Canada.
| | - Rosalyn Gloag
- University of Sydney, School of Life and Environmental Sciences, Sydney, NSW 2006, Australia.
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