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    Genetic diversity of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) colonizing sweet potato and cassava in South Sudan

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    Journal Article (821.4Kb)
    Date
    2020
    Author
    Misaka, B.C.
    Wosula, E.N.
    Marchelo-d’Ragga, P.W.
    Hvoslef-Eide, T.
    Legg, J.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Bemisia tabaci (Gennadius) is a polyphagous, highly destructive pest that is capable of vectoring viruses in most agricultural crops. Currently, information regarding the distribution and genetic diversity of B. tabaci in South Sudan is not available. The objectives of this study were to investigate the genetic variability of B. tabaci infesting sweet potato and cassava in South Sudan. Field surveys were conducted between August 2017 and July and August 2018 in 10 locations in Juba County, Central Equatoria State, South Sudan. The sequences of mitochondrial DNA cytochrome oxidase I (mtCOI) were used to determine the phylogenetic relationships between sampled B. tabaci. Six distinct genetic groups of B. tabaci were identified, including three non-cassava haplotypes (Mediterranean (MED), Indian Ocean (IO), and Uganda) and three cassava haplotypes (Sub-Saharan Africa 1 sub-group 1 (SSA1-SG1), SSA1-SG3, and SSA2). MED predominated on sweet potato and SSA2 on cassava in all of the sampled locations. The Uganda haplotype was also widespread, occurring in five of the sampled locations. This study provides important information on the diversity of B. tabaci species in South Sudan. A comprehensive assessment of the genetic diversity, geographical distribution, population dynamics, and host range of B. tabaci species in South Sudan is vital for its effective management.
    https://dx.doi.org/10.3390/insects11010058
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7687
    IITA Authors ORCID
    James Legghttps://orcid.org/0000-0003-4140-3757
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3390/insects11010058
    Research Themes
    Plant Production and Health
    IITA Subjects
    Agronomy; Cassava; Disease Control; Pests of Plants; Plant Breeding; Plant Diseases; Plant Health; Plant Production
    Agrovoc Terms
    Bemisia Tabaci; Genetics; Distribution; Potatoes; Cassava
    Regions
    Africa; North Africa
    Countries
    South Sudan
    Hubs
    Eastern Africa Hub
    Journals
    Insects
    Collections
    • Journal and Journal Articles4835
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