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

Cheng Yuan Xu; M H Julien; M Fatemi; C Girod; R D Van Klinken; C L Gross; S J Novak

doi:10.1111/j.1461-0248.2009.01395.x

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

Journal article

Peer reviewed

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

Cheng Yuan Xu, M H Julien, M Fatemi, C Girod, R D Van Klinken, C L Gross and S J Novak

Ecology Letters, Vol.13(1), pp.32-44

2010

DOI: https://doi.org/10.1111/j.1461-0248.2009.01395.x

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Abstract

Ecological Applications

Ecology

biological invasions

differentiation

multiple introductions

phenotypic evolution

selection

sexual reproduction

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.

Details

Title: Phenotypic divergence during the invasion of Phyla canescens in Australia and France: evidence for selection-driven evolution
Authors: Cheng Yuan Xu (Author) - CSIRO Entomology
M H Julien (Author) - CSIRO European Laboratory, France
M Fatemi (Author) - University of New England
C Girod (Author) - UMR7179 CNRS-MNHN, France
R D Van Klinken (Author) - CSIRO Entomology
C L Gross (Author) - University of New England
S J Novak (Author) - Boise State University, United States
Publication details: Ecology Letters, Vol.13(1), pp.32-44
Publisher: Wiley-Blackwell Publishing Ltd.
Date published: 2010
DOI: 10.1111/j.1461-0248.2009.01395.x
ISSN: 1461-023X
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99450159102621
Output Type: Journal article

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Web Of Science research areas: Ecology

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