Neutral and outlier single nucleotide polymorphisms disentangle the evolutionary history of a coastal Solanaceae species.
Pampa
Solanaceae
South Atlantic coastal plain
phylogeography
plant diversification
population genomics
Journal
Molecular ecology
ISSN: 1365-294X
Titre abrégé: Mol Ecol
Pays: England
ID NLM: 9214478
Informations de publication
Date de publication:
05 2022
05 2022
Historique:
revised:
11
03
2022
received:
08
06
2021
accepted:
16
03
2022
pubmed:
26
3
2022
medline:
18
5
2022
entrez:
25
3
2022
Statut:
ppublish
Résumé
Speciation begins with the isolation of some individuals or subpopulations due to drivers promoting a diverging genetic distribution. Such isolation may occur, followed by different processes and pressures. Isolation-by-distance (IBD), isolation-by-adaptation (IBA), and isolation-by-colonization (IBC) have been recognized as the main divergence patterns. Still, it is not easy to distinguish which one is the main pattern as each one may act at different points in time or even simultaneously. Using an extensive genome coverage from a Petunia species complex with coastal and inland distribution and multiple analytical approaches on population genomics and phylogeography, we showed a complex interplay between neutral and selective forces acting on the divergence process. We found 18,887 SNPs potentially neutral and 924 potentially under selection (outlier) loci. All analyses pointed that each subspecies displays its own genetic component and evolutionary history. We suggested plausible ecological drivers for such divergence in a southernmost South Atlantic coastal plain in Brazil and Uruguay and identified a connection between adaptation and environment heterogeneity.
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2847-2864Informations de copyright
© 2022 John Wiley & Sons Ltd.
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