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Experimental evidence for the phenotypic impact of admixture between wild and biocontrol Asian ladybird (Harmonia axyridis) involved in the European invasion

(2011) JOURNAL OF EVOLUTIONARY BIOLOGY. 24(5). p.1044-1052
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Abstract
Hybridization can fuel evolutionary processes during biological invasions. The harlequin ladybird Harmonia axyridis has long been used as a biocontrol agent before the species became invasive worldwide. Previous analysis based on microsatellite data has shown that European invasive populations bear traces of admixture between an eastern North American source, which is at the origin of the worldwide invasion, and biocontrol strains used in Europe. In this study, we tested the hypothesis that this early admixture event may have fostered the European invasion by impacting on the phenotypes of wild European populations. Mean life history traits of experimental F(1) hybrids are compared with pure parental sources and wild European crosses. Our results reveal a biased impact whereby North American beetles benefitted from being admixed with European biocontrol strains. Resemblance between experimental hybrids and wild European invasive crosses further suggests a long-lasting effect of admixture that may still be at work and fostering invasiveness.
Keywords
biological invasion, Europe, biocontrol, admixture, adaptive evolution, harlequin ladybird, Harmonia axyridis, Hybridization, life history, phenotype, PALLAS COLEOPTERA, MULTIPLE INTRODUCTIONS, BIOLOGICAL INVASION, HARLEQUIN LADYBIRD, ADAPTIVE EVOLUTION, GENETIC-VARIATION, UNITED-STATES, LIFE-HISTORY, COCCINELLIDAE, HYBRIDIZATION

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Chicago
Turgeon, J, A Tayeh, B Facon, E Lombaert, Patrick De Clercq, Nick Berkvens, JG Lundgren, and A Estoup. 2011. “Experimental Evidence for the Phenotypic Impact of Admixture Between Wild and Biocontrol Asian Ladybird (Harmonia Axyridis) Involved in the European Invasion.” Journal of Evolutionary Biology 24 (5): 1044–1052.
APA
Turgeon, J., Tayeh, A., Facon, B., Lombaert, E., De Clercq, P., Berkvens, N., Lundgren, J., et al. (2011). Experimental evidence for the phenotypic impact of admixture between wild and biocontrol Asian ladybird (Harmonia axyridis) involved in the European invasion. JOURNAL OF EVOLUTIONARY BIOLOGY, 24(5), 1044–1052.
Vancouver
1.
Turgeon J, Tayeh A, Facon B, Lombaert E, De Clercq P, Berkvens N, et al. Experimental evidence for the phenotypic impact of admixture between wild and biocontrol Asian ladybird (Harmonia axyridis) involved in the European invasion. JOURNAL OF EVOLUTIONARY BIOLOGY. 2011;24(5):1044–52.
MLA
Turgeon, J, A Tayeh, B Facon, et al. “Experimental Evidence for the Phenotypic Impact of Admixture Between Wild and Biocontrol Asian Ladybird (Harmonia Axyridis) Involved in the European Invasion.” JOURNAL OF EVOLUTIONARY BIOLOGY 24.5 (2011): 1044–1052. Print.
@article{2017694,
  abstract     = {Hybridization can fuel evolutionary processes during biological invasions. The harlequin ladybird Harmonia axyridis has long been used as a biocontrol agent before the species became invasive worldwide. Previous analysis based on microsatellite data has shown that European invasive populations bear traces of admixture between an eastern North American source, which is at the origin of the worldwide invasion, and biocontrol strains used in Europe. In this study, we tested the hypothesis that this early admixture event may have fostered the European invasion by impacting on the phenotypes of wild European populations. Mean life history traits of experimental F(1) hybrids are compared with pure parental sources and wild European crosses. Our results reveal a biased impact whereby North American beetles benefitted from being admixed with European biocontrol strains. Resemblance between experimental hybrids and wild European invasive crosses further suggests a long-lasting effect of admixture that may still be at work and fostering invasiveness.},
  author       = {Turgeon, J and Tayeh, A and Facon, B and Lombaert, E and De Clercq, Patrick and Berkvens, Nick and Lundgren, JG and Estoup, A},
  issn         = {1010-061X},
  journal      = {JOURNAL OF EVOLUTIONARY BIOLOGY},
  keyword      = {biological invasion,Europe,biocontrol,admixture,adaptive evolution,harlequin ladybird,Harmonia axyridis,Hybridization,life history,phenotype,PALLAS COLEOPTERA,MULTIPLE INTRODUCTIONS,BIOLOGICAL INVASION,HARLEQUIN LADYBIRD,ADAPTIVE EVOLUTION,GENETIC-VARIATION,UNITED-STATES,LIFE-HISTORY,COCCINELLIDAE,HYBRIDIZATION},
  language     = {eng},
  number       = {5},
  pages        = {1044--1052},
  title        = {Experimental evidence for the phenotypic impact of admixture between wild and biocontrol Asian ladybird (Harmonia axyridis) involved in the European invasion},
  url          = {http://dx.doi.org/10.1111/j.1420-9101.2011.02234.x},
  volume       = {24},
  year         = {2011},
}

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