• Login
    View Item 
    •   Repository
    • Journal Articles
    • Articles: Department of Biological Sciences
    • View Item
    •   Repository
    • Journal Articles
    • Articles: Department of Biological Sciences
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Temporal genetic structuring of a specialist parasitoid, Lysiphlebus hirticornis Mackauer (Hymenoptera: Braconidae) attacking a specialist aphid on tansy

    Thumbnail
    View/Open
    Full text (89.99Kb)
    Date
    2010-11
    Author
    Nyabuga, Franklin N.
    Metadata
    Show full item record
    Abstract
    In insect species characterized by inbreeding, limited dispersal, and a metapopulation structure, high genetic differentiation and reduced genetic diversity within local populations are expected. Using the model system Lysiphlebus hirticornis Mackauer, a specialist parasitoid of the tansy aphid, Metopeurum fuscoviride Stroyan (Hemiptera: Aphididae), we examined within-site temporal population dynamics and genetics, including molecular variation at the tansy plant level. Aphid-parasitoid dynamics were surveyed and parasitoids sampled from 72 tansy plants at 11 sites in and around Jena, Germany, over one growing season. Thereafter, parasitoid samples were genotyped at 11 polymorphic microsatellite loci. Colonization, extinction, and recolonization events occurred during the season. Allele numbers and identities were highly variable over time. When samples from all sites were pooled, allele number over all loci showed a decreasing trend with time. At the level of sites, temporal changes in genetic diversity were more variable. Analysis of molecular variance revealed that samples at the plant level explained the highest variance compared to at site level. We conclude that the genetic structuring of this insect is very fine grained (i.e. at the tansy plant level) and the temporal genetic diversity is explained by a combination of extinction and recolonization events, as well as inbreeding.
    URI
    http://hdl.handle.net/123456789/1304
    Collections
    • Articles: Department of Biological Sciences [285]

    University of Embu copyright ©  2021
    Contact us | Send Feedback
    Library ER 
    Atmire NV
     

     

    Browse

    All of RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    University of Embu copyright ©  2021
    Contact us | Send Feedback
    Library ER 
    Atmire NV