Population genomic analyses reveal a history of range expansion and trait evolution across the native and invaded range of yellow starthistle (Centaurea solstitialis)

Brittany S. Barker, Krikor Andonian, Sarah M. Swope, Douglas G. Luster, Katrina M Dlugosch

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Identifying sources of genetic variation and reconstructing invasion routes for non-native introduced species is central to understanding the circumstances under which they may evolve increased invasiveness. In this study, we used genome-wide single nucleotide polymorphisms to study the colonization history of Centaurea solstitialis in its native range in Eurasia and invasions into the Americas. We leveraged this information to pinpoint key evolutionary shifts in plant size, a focal trait associated with invasiveness in this species. Our analyses revealed clear population genomic structure of potential source populations in Eurasia, including deep differentiation of a lineage found in the southern Apennine and Balkan Peninsulas and divergence among populations in Asia, eastern Europe and western Europe. We found strongest support for an evolutionary scenario in which western European populations were derived from an ancient admixture event between populations from eastern Europe and Asia, and subsequently served as the main genetic ‘bridgehead’ for introductions to the Americas. Introductions to California appear to be from a single source region, and multiple, independent introductions of divergent genotypes likely occurred into the Pacific Northwest. Plant size has evolved significantly at three points during range expansion, including a large size increase in the lineage responsible for the aggressive invasion of the California interior. These results reveal a long history of colonization, admixture and trait evolution in C. solstitialis, and suggest routes for improving evidence-based management decisions for one of the most ecologically and economically damaging invasive species in the western United States.

Original languageEnglish (US)
Pages (from-to)1131-1147
Number of pages17
JournalMolecular Ecology
Volume26
Issue number4
DOIs
StatePublished - Feb 1 2017

Fingerprint

Centaurea
Centaurea solstitialis
Metagenomics
range expansion
genomics
invasiveness
Introduced Species
Eastern Europe
Eastern European region
Eurasia
colonization
history
Population
Balkan Peninsula
Northwestern United States
introduced species
invasive species
Far East
genetic variation
Balkans

Keywords

  • admixture
  • biological invasion
  • invasion routes
  • phylogeography
  • rapid evolution
  • restriction site-associated sequencing

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics

Cite this

Population genomic analyses reveal a history of range expansion and trait evolution across the native and invaded range of yellow starthistle (Centaurea solstitialis). / Barker, Brittany S.; Andonian, Krikor; Swope, Sarah M.; Luster, Douglas G.; Dlugosch, Katrina M.

In: Molecular Ecology, Vol. 26, No. 4, 01.02.2017, p. 1131-1147.

Research output: Contribution to journalArticle

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