Journal article
Rapid establishment of a flowering cline in Medicago polymorpha after invasion of North America
Molecular ecology, Vol.27(23), pp.4758-4774
12/2018
Handle:
https://hdl.handle.net/2376/100977
PMID: 30325569
Abstract
To establish and spread in a new location, an invasive species must be able to carry out its life cycle in novel environmental conditions. A key trait underlying fitness is the shift from vegetative to reproductive growth through floral development. In this study, we used a common garden experiment and genotyping-by-sequencing to test whether the latitudinal flowering cline of the North American invasive plant Medicago polymorpha was translocated from its European native range through multiple introductions, or whether the cline rapidly established due to evolution following a genetic bottleneck. Analysis of flowering time in 736 common garden plants showed a latitudinal flowering time cline in both the native and invaded ranges where genotypes from lower latitudes flowered earlier. Genotyping-by-sequencing of 9,658 SNPs in 446 individuals revealed two major subpopulations of M. polymorpha in the native range, only one of which is present in the invaded range. Additionally, native range populations have higher genetic diversity than invaded range populations, suggesting that a genetic bottleneck occurred during invasion. All invaded range individuals are closely related to plants collected from native range populations in Portugal and southern Spain, and population assignment tests assigned invaded range individuals to this same narrow source region. Taken together, our results suggest that latitudinal clinal variation in flowering time has rapidly evolved across the invaded range despite a genetic bottleneck following introduction.
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Details
- Title
- Rapid establishment of a flowering cline in Medicago polymorpha after invasion of North America
- Creators
- Emily E Helliwell - School of Biological Sciences, Washington State University, Vancouver, WashingtonJoshua Faber-Hammond - School of Biological Sciences, Washington State University, Vancouver, WashingtonZoie C Lopez - School of Biological Sciences, Washington State University, Vancouver, WashingtonAaron Garoutte - Department of Plant Biology, Michigan State University, East Lansing, MichiganEric von Wettberg - Department of Plant and Soil Science, The University of Vermont, Burlington, VermontMaren L Friesen - Department of Crop and Soil Sciences, Washington State University, Pullman, WashingtonStephanie S Porter - School of Biological Sciences, Washington State University, Vancouver, Washington
- Publication Details
- Molecular ecology, Vol.27(23), pp.4758-4774
- Academic Unit
- Plant Pathology, Department of; Biological Sciences, School of
- Publisher
- England
- Identifiers
- 99900546520001842
- Language
- English
- Resource Type
- Journal article