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    Genetic comparisons of fall armyworm populations from 11 countries spanning sub-Saharan Africa provide insights into strain composition and migratory behaviors

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    U19ArtNagoshiGeneticInthomDev.pdf (1.227Mb)
    Date
    2019-06-05
    Author
    Nagoshi, R.N.
    Goergen, G.
    Plessis, H. du
    Van den Berg, J.
    Meaghe, R.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    The recent discovery of fall armyworm (Spodoptera frugiperda, J.E. Smith) in Africa presents a significant threat to that continent’s food security. The species exhibits several traits in the Western Hemisphere that if transferred to Africa would significantly complicate control efforts. These include a broad host range, long-distance migratory behavior, and resistance to multiple pesticides that varies by regional population. Therefore, determining which fall armyworm subpopulations are present in Africa could have important implications for risk assessments and mitigation efforts. The current study is an extension of earlier surveys that together combine the collections from 11 nations to produce the first genetic description of fall armyworm populations spanning the sub-Saharan region. Comparisons of haplotype frequencies indicate significant differences between geographically distant populations. The haplotype profile from all locations continue to identify Florida and the Caribbean regions as the most likely Western Hemisphere origins of the African infestations. The current data confirm the uncertainty of fall armyworm strain identification in Africa by genetic methods, with the possibility discussed that the African infestation may represent a novel interstrain hybrid population of potentially uncertain behavioral characteristics.
    https://dx.doi.org/10.1038/s41598-019-44744-9
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/5860
    Non-IITA Authors ORCID
    Georg Goergenhttps://orcid.org/0000-0003-4496-0495
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1038/s41598-019-44744-9
    Research Themes
    PLANT PRODUCTION & HEALTH
    IITA Subjects
    Pests Of Plants; Plant Genetic Resources; Plant Health
    Agrovoc Terms
    Spodoptera Frugiperda; Food Security; Africa; Risk Assessment; Genetics
    Regions
    Africa; Central Africa; East Africa; Southern Africa; West Africa
    Countries
    Central African Republic; Congo, Dr; Ghana; South Africa; Togo; Zambia
    Journals
    Scientific Reports
    Collections
    • Journal and Journal Articles4835
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