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    On the origin and genetic variability of the two invasive biotypes of Chromolaena odorata

    Access Status
    Fulltext not available
    Authors
    Shao, X.
    Li, Q.
    Lin, L.
    He, Tianhua
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Shao, X. and Li, Q. and Lin, L. and He, T. 2018. On the origin and genetic variability of the two invasive biotypes of Chromolaena odorata. Biological Invasions: pp. 1-14.
    Source Title
    Biological Invasions
    DOI
    10.1007/s10530-018-1677-4
    ISSN
    1387-3547
    School
    School of Molecular and Life Sciences (MLS)
    URI
    http://hdl.handle.net/20.500.11937/68438
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 Springer International Publishing AG, part of Springer Nature Chromolaena odorata (L.) R. M. King and H. Robinson (Asteraceae), originally from the Neotropics, has become a serious weed in the humid tropics and subtropics of Southeast Asia, Africa and Pacific Islands. In its introduced distributions, C. odorata has been recognised as two biotypes, the Asian/West African (AWA) biotype and South African (SA) biotype, with independent distribution, morphology and ecological characters. To characterise the genetic variability and identify the likely source regions in the native distributions of the two biotypes, we carried out an extensive phylogeographic study using chloroplast and nuclear DNA sequences and microsatellite DNA markers. The analysis of both DNA sequences and nuclear markers showed that native populations possessed high genetic diversity, while both the AWA and SA biotypes in invaded regions appeared to have low genetic diversity. The AWA and SA biotypes were genetically distinct. Strong competitive ability and environmental adaptability may have facilitated the invasion AWA and SA biotypes in its respective invasive regions. We conclude that the source of AWA biotype may be Trinidad and Tobago, while the SA biotype was from Cuba and Jamaica. For a better outcome of biocontrol, the potential biological control agents for the two biotypes should be collected from these native regions, respectively.

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