A1 Refereed original research article in a scientific journal
Population Genomics of a Cosmopolitan Weed Provides Insights Into Its Local Adaptation and Recent Demographic History; 
Authors: Lucas, Marilia Souza; Rosche, Christoph; Hensen, Isabell; Michalski, Stefan G.; Nagy, David U.; Gamba, Diana; Onstein, Renske E.; Abidkulova, Karime; Al-Gharaibeh, Mohammad; Al-Namazi, Ali A.; Babaei, Sirwan; Bastida, Fernando; Brunharo, Caio; Caillon, Aurelien; Callaway, Ragan M.; Clair, Sam St; Cullen, Darron A.; Donnelly, Ryan; Ennis, Alyson; Ensing, David J.; Eren, Ozkan; Erst, Andrey; Filep, Rita; Flory, Luke; Frazee, Lauren J.; Gafforov, Yusufjon; Gendron, Fidji; Gudzinskas, Zigmantas; Guilliams, Christopher Matt; Hajdari, Avni; Hao, Jian-Hua; Haramoto, Erin; Ivashchenko, Anna A.; Jun, Li; Kane, Nolan; Kaproth, Matthew A.; Kassem, Hesham; Khabbach, Abdelmajid; Khasa, Damase P.; Koski, Matthew; Kozhevnikova, Maria; Krigas, Nikos; Krivenko, Denis; Lasky, Jesse R.; Lekberg, Ylva; Libiad, Mohamed; Lozano, Vanessa; Luo, Wenbo; Makhkamov, Trobjon; Marchante, Elizabete; Moffat, Chandra; Moore, Abigail; Muldashev, Albert; Nersesyan, Anush; Olsson, Pal l Axel; Oprea, Adrian; Pal, Robert; Papikyan, Astghik; Proctor, Christopher; Prokhorov, Vadim; Ramula, Satu; Rauschert, Emily; Reatini, Bryan; Rixen, Christian; Rush, Scott; Rutten, Gemma; Saadani, Mariem; Samartza, Ioulietta; Selke, Julian; Senator, Stepan; Shah, Manzoor A.; Sheng, Min; Sheriff, Jamal; Shukherdorj, Baasanmunkh; Sikkema, Peter; Silaeva, Tatiana; Suzuki, Satoshi N.; Thoma, Arpad E.; Tian, Baoliang; Tokhtar, Valeriy; Trager, Sabrina; Tsunoda, Tomonori; Turginov, Orzimat; Turner, Kathryn G.; Vakhlamova, Tatyana; Vinogradova, Yulia; Wagner, Viktoria; Westberg, Lydia; Xiao, Sa; Barratt, Christopher D.; Durka, Walter
Publisher: Wiley
Publication year: 2026
Journal: Molecular Ecology
Article number: e70368
Volume: 35
Issue: 10
ISSN: 0962-1083
eISSN: 1365-294X
DOI: https://doi.org/10.1111/mec.70368
Publication's open availability at the time of reporting: Open Access
Publication channel's open availability : Partially Open Access publication channel
Web address : https://doi.org/10.1111/mec.70368
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/526537429
Self-archived copy's licence: CC BY
Self-archived copy's version: Publisher`s PDF
Invasive plant species present a growing ecological and economic challenge, and often adapt rapidly to their novel environments through complex demographic and evolutionary processes. Invasion genomics offers powerful tools to disentangle these processes, but most studies rely on geographically narrow sampling across native and non-native ranges. Erigeron canadensis is a cosmopolitan weed native to North America that has successfully invaded diverse climates worldwide. We used double-digest restriction site-associated DNA sequencing (ddRADseq) to investigate the genetic diversity and structure of 280 E. canadensis populations across the Northern Hemisphere. We found that native and non-native populations maintained comparable genetic diversity. Population structure analyses revealed four genetic clusters that were mainly differentiated along latitudinal and aridity gradients. However, one cluster was strongly overrepresented in the non-native compared to the native range. In the native range, genetic differentiation was shaped by spatial and environmental gradients, while in non-native regions human-mediated dispersal and repeated introductions disrupted environmentally driven genetic structure. Migration network analyses revealed limited intercontinental connectivity and a possible role of long-distance dispersal in within-range expansions. Genomic offset analyses showed that genotype-environment mismatches in non-native populations associated with reduced growth and reproduction. Together, our results indicate that the invasion dynamics of E. canadensis were driven by multiple introductions, population admixture, and lineage sorting, while some genotypes contributed disproportionately to the spread of this invader. The presence of apparent maladaptation suggests that even long-established invaders may still be evolving in response to their novel environment, raising concerns about potential future expansions.
Keywords:
Erigeron canadensis, rapid evolution
Downloadable publication This is an electronic reprint of the original article. |  |
Funding information in the publication:
This research was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation; Project number: RO 6418/1-1) and iDiv Flexpool funding (grant number W47038118). The German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig is funded by the DFG (FZT 118, 202548816).
