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    High-throughput multiplex real-time PCR assay for the simultaneous quantification of DNA and RNA viruses infecting cassava plants

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    S16ArtOttiHighthroughputInthomDev.pdf (284.4Kb)
    Date
    2016-05
    Author
    Otti, G.
    Bouvaine, S.
    Kimata, B.
    Mkamillo, G.
    Kumar, P.L.
    Tomlins, K.
    Maruthi, M.N.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Aims: To develop a multiplex TaqMan-based real-time PCR assay (qPCR) for the simultaneous detection and quantification of both RNA and DNA viruses affecting cassava (Manihot esculenta) in eastern Africa. Methods and Results: The diagnostic assay was developed for two RNA viruses; Cassava brown streak virus (CBSV) and Uganda cassava brown streak virus (UCBSV) and two predominant DNA viruses; African cassava mosaic virus (ACMV) and East African cassava mosaic virus (EACMV), which cause the economically important cassava brown streak disease (CBSD) and cassava mosaic disease (CMD) respectively. Our method, developed by analysing PCR products of viruses, was highly sensitive to detect target viruses from very low quantities of 4–10 femtograms. Multiplexing did not diminish sensitivity or accuracy compared to uniplex alternatives. The assay reliably detected and quantified four cassava viruses in field samples where CBSV and UCBSV synergy was observed in majority of mixed-infected varieties. Conclusions: We have developed a high-throughput qPCR diagnostic assay capable of specific and sensitive quantification of predominant DNA and RNA viruses of cassava in eastern Africa. Significance and Impact of the Study: The qPCR methods are a great improvement on the existing methods and can be used for monitoring virus spread as well as for accurate evaluation of the cassava varieties for virus resistance.
    https://dx.doi.org/10.1111/jam.13043
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/1247
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1111/jam.13043
    IITA Subjects
    Cassava; Plant Diseases
    Agrovoc Terms
    Cassava; Dna; Plant Diseases; Rna; Pcr
    Regions
    Africa; East Africa; Southern Africa
    Countries
    Burundi; Congo, Dr; Kenya; Malawi; Mozambique; Uganda
    Journals
    Journal of Applied Microbiology
    Collections
    • Journal and Journal Articles4835
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