Admixture With Cultivated Sunflower Likely Facilitated Establishment and Spread of Wild Sunflower (Helianthus annuus) in Argentina.

admixture crop‐wild haploblocks invasive population genomics sunflower

Journal

Molecular ecology
ISSN: 1365-294X
Titre abrégé: Mol Ecol
Pays: England
ID NLM: 9214478

Informations de publication

Date de publication:
18 Oct 2024
Historique:
revised: 20 08 2024
received: 10 04 2024
accepted: 29 08 2024
medline: 18 10 2024
pubmed: 18 10 2024
entrez: 18 10 2024
Statut: aheadofprint

Résumé

A better understanding of the genetic and ecological factors underlying successful invasions is critical to mitigate the negative impacts of invasive species. Here, we study the invasion history of Helianthus annuus populations from Argentina, with particular emphasis on the role of post-introduction admixture with cultivated sunflower (also H. annuus) and climate adaptation driven by large haploblocks. We conducted genotyping-by-sequencing of samples of wild populations as well as Argentinian cultivars and compared them with wild (including related annual Helianthus species) and cultivated samples from the native range. We also characterised samples for 11 known haploblocks associated with environmental variation in native populations to test whether haploblocks contributed to invasion success. Population genomics analyses supported two independent geographic sources for Argentinian populations, the central United States and Texas, but no significant contribution of related annual Helianthus species. We found pervasive admixture with cultivated sunflower, likely as result of post-introduction hybridization. Genomic scans between invasive populations and their native sources identified multiple genomic regions of divergence, possibly indicative of selection, in the invaded range. These regions significantly overlapped between the two native-invasive comparisons and showed disproportionally high crop ancestry, suggesting that crop alleles contributed to invasion success. We did not find evidence of climate adaptation mediated by haploblocks, yet outliers of genome scans were enriched in haploblock regions and, for at least two haploblocks, the cultivar haplotype was favoured in Argentina. Our results show that admixture with cultivated sunflower played a major role in the establishment and spread of H. annuus populations in Argentina.

Identifiants

pubmed: 39422702
doi: 10.1111/mec.17560
doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

e17560

Informations de copyright

© 2024 The Author(s). Molecular Ecology published by John Wiley & Sons Ltd.

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Auteurs

Fernando Hernández (F)

Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada.

Román B Vercellino (RB)

Departamento de Agronomía, CERZOS, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina.

Marco Todesco (M)

Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada.
Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada.
Irving K. Barber Faculty of Science, University of British Columbia Okanagan, Kelowna, British Columbia, Canada.

Natalia Bercovich (N)

Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada.

Daniel Alvarez (D)

Estación Experimental Agropecuaria INTA Manfredi, Córdoba, Argentina.

Johanne Brunet (J)

Vegetable Crops Research Unit, USDA-ARS, Madison, Wisconsin, USA.

Alejandro Presotto (A)

Departamento de Agronomía, CERZOS, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina.

Loren H Rieseberg (LH)

Department of Botany and Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada.

Classifications MeSH