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Inferring the origin of populations introduced from a genetically structured native range by approximate Bayesian computation: case study of the invasive ladybird Harmonia axyridis.

Lombaert, E.; Guillemaud, T.; Thomas, C. E.; Lawson Handley, L. J.; Li, J.; Wang, S.; Pang, H.; Goryacheva, I.; Zakharov, I. A.; Jousselin, E.; Poland, R. L.; Migeon, A.; Van Lenteren, J.; De Clercq, P.; Berkvens, N.; Jones, W.; Estoup, A.

Authors

E. Lombaert

T. Guillemaud

C. E. Thomas

J. Li

S. Wang

H. Pang

I. Goryacheva

I. A. Zakharov

E. Jousselin

R. L. Poland

A. Migeon

J. Van Lenteren

P. De Clercq

N. Berkvens

W. Jones

A. Estoup



Abstract

Correct identification of the source population of an invasive species is a prerequisite for testing hypotheses concerning the factors responsible for biological invasions. The native area of invasive species may be large, poorly known and/or genetically structured. Because the actual source population may not have been sampled, studies based on molecular markers may generate incorrect conclusions about the origin of introduced populations. In this study, we characterized the genetic structure of the invasive ladybird Harmonia axyridis in its native area using various population genetic statistics and methods. We found that native area of H. axyridis most probably consisted of two geographically distinct genetic clusters located in eastern and western Asia. We then performed approximate Bayesian computation (ABC) analyses on controlled simulated microsatellite data sets to evaluate (i) the risk of selecting incorrect introduction scenarios, including admixture between sources, when the populations of the native area are genetically structured and sampling is incomplete and (ii) the ability of ABC analysis to minimize such risks by explicitly including unsampled populations in the scenarios compared. Finally, we performed additional ABC analyses on real microsatellite data sets to retrace the origin of biocontrol and invasive populations of H. axyridis, taking into account the possibility that the structured native area may have been incompletely sampled. We found that the invasive population in eastern North America, which has served as the bridgehead for worldwide invasion by H. axyridis, was probably formed by an admixture between the eastern and western native clusters. This admixture may have facilitated adaptation of the bridgehead population.

Citation

Lombaert, E., Guillemaud, T., Thomas, C. E., Lawson Handley, L. J., Li, J., Wang, S., Pang, H., Goryacheva, I., Zakharov, I. A., Jousselin, E., Poland, R. L., Migeon, A., Van Lenteren, J., De Clercq, P., Berkvens, N., Jones, W., & Estoup, A. (2011). Inferring the origin of populations introduced from a genetically structured native range by approximate Bayesian computation: case study of the invasive ladybird Harmonia axyridis. Molecular ecology, 20(22), 4654-4670. https://doi.org/10.1111/j.1365-294X.2011.05322.x

Journal Article Type Article
Acceptance Date Nov 30, 2011
Online Publication Date Oct 18, 2011
Publication Date 2011-11
Journal Molecular ecology
Print ISSN 0962-1083
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 20
Issue 22
Pages 4654-4670
DOI https://doi.org/10.1111/j.1365-294X.2011.05322.x
Keywords Genetics; Ecology, Evolution, Behavior and Systematics
Public URL https://hull-repository.worktribe.com/output/409426
PMID 22004292