Population genomic and historical analysis suggests a global invasion by bridgehead processes in Mimulus guttatus.

ABSTRACT: Imperfect historical records and complex demographic histories present challenges for reconstructing the history of biological invasions. Here, we combine historical records, extensive worldwide and genome-wide sampling, and demographic analyses to investigate the global invasion of Mimulus guttatus from North America to Europe and the Southwest Pacific. By sampling 521 plants from 158 native and introduced populations genotyped at >44,000 loci, we determined that invasive M. guttatus was first likely introduced to the British Isles from the Aleutian Islands (Alaska), followed by admixture from multiple parts of the native range. We hypothesise that populations in the British Isles then served as a bridgehead for vanguard invasions worldwide. Our results emphasise the highly admixed nature

SUBMITTER: Vallejo-Marin M 

PROVIDER: S-EPMC7954805 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature