Phenotypic divergence during the invasion of phyla canescens in Australia and France: evidence for selection-driven evolution

Article

Xu, Cheng-Yuan, Julien, Mic H., Fatemi, Mohammed, Girod, Christophe, van Klinken, Rieks D., Gross, Caroline L. and Novak, Stephen J.. 2010. "Phenotypic divergence during the invasion of phyla canescens in Australia and France: evidence for selection-driven evolution." Ecology Letters. 13 (1), pp. 32-44. https://doi.org/10.1111/j.1461-0248.2009.01395.x
Article Title

Phenotypic divergence during the invasion of phyla canescens in Australia and France: evidence for selection-driven evolution

ERA Journal ID3238
Article CategoryArticle
AuthorsXu, Cheng-Yuan (Author), Julien, Mic H. (Author), Fatemi, Mohammed (Author), Girod, Christophe (Author), van Klinken, Rieks D. (Author), Gross, Caroline L. (Author) and Novak, Stephen J. (Author)
Journal TitleEcology Letters
Journal Citation13 (1), pp. 32-44
Number of Pages13
Year2010
Place of PublicationOxford, United Kingdom
ISSN1461-023X
1461-0248
Digital Object Identifier (DOI)https://doi.org/10.1111/j.1461-0248.2009.01395.x
Abstract

Rapid adaptive evolution has been advocated as a mechanism that promotes invasion. Demonstrating adaptive evolution in invasive species requires rigorous analysis of phenotypic shifts driven by selection. Here, we document selection-driven evolution of Phyla canescens, an Argentine weed, in two invaded regions (Australia and France). Invasive populations possessed similar or higher diversity than native populations, and displayed mixed lineages from different sources, suggesting that genetic bottlenecks in both countries might have been alleviated by multiple introductions. Compared to native populations, Australian populations displayed more investment in sexual reproduction, whereas French populations possessed enhanced vegetative reproduction and growth. We partitioned evolutionary forces (selection vs. stochastic events) using two independent methods. Results of both analyses suggest that the pattern of molecular and phenotypic variability among regions was consistent with selection-driven evolution, rather than stochastic events. Our findings indicate that selection has shaped the evolution of P. canescens in two different invaded regions.

Keywordsbiological invasions; differentiation; multiple introductions; phenotypic evolution; selection; sexual reproduction; stochastic events; vegetative reproduction
ANZSRC Field of Research 2020310403. Biological adaptation
410202. Biosecurity science and invasive species ecology
310804. Plant developmental and reproductive biology
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Byline AffiliationsCommonwealth Scientific and Industrial Research Organisation (CSIRO), Australia
CSIRO European Laboratory, France
University of New England
Museum of Natural History, France
Boise State University, United States
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