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Abstract Detail

The Botany of Invasions

Vallejo-Marin, Mario [1].

Monkeyflower invasions: Highly admixed and hybrid populations dominate range expansions and are associated with the rapid evolution of local adaptation.

The success of invasive populations during range expansion depends in part on their ability to thrive in new environments. Ecological similarity between native and invasive ranges can increase the chances that invasive populations become established, but ultimately novel ranges are likely to impose new selective pressures and trigger local adaptation. One mechanism that might facilitate rapid evolution is increased genetic diversity through admixture between genetically distinct populations or species following multiple introductions from the native range. Some species of monkeyflowers (Mimulus spp.) have been introduced around the world, thriving in riverbanks and wet places from the Faroe Islands to the British Isles to New Zealand. In this talk, I will use a recently conducted population genomics analysis of monkeyflowers to illustrate how the process of invasion has resulted in highly admixed populations that serve as stepping-stones for subsequent range expansions. I will then summarise field, greenhouse and reciprocal transplant experiments we have conducted on monkeyflowers to demonstrate that admixed populations have evolved locally adapted genotypes over the last 200 years. Local adaptation within the British Isles has also occurred in the highly asexual hybrid between M. guttatus and M. luteus, suggesting that even asexual taxa have the potential to rapidly adapt to local conditions, perhaps through genotypic selection and changes in the extent of phenotypic plasticity.

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1 - University Of Stirling, Biological And Environmental Scinces, Cottrell Building, Stirling, STG, FK9 4LA, United Kingdom

Biological invasions
Population genomics
flowering plant evolution
local adaptation.

Presentation Type: Symposium Presentation
Session: SY2, The Botany of Invasions
Location: /
Date: Monday, July 19th, 2021
Time: 2:00 PM(EDT)
Number: SY2009
Abstract ID:219
Candidate for Awards:None

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