• Contact Us
    • Send Feedback
    • Login
    View Item 
    •   Home
    • Journal and Journal Articles
    • Journal and Journal Articles
    • View Item
    •   Home
    • Journal and Journal Articles
    • Journal and Journal Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    Whole Repository
    CollectionsIssue DateRegionCountryHubAffiliationAuthorsTitlesSubject
    This Sub-collection
    Issue DateRegionCountryHubAffiliationAuthorsTitlesSubject

    My Account

    Login

    Welcome to the International Institute of Tropical Agriculture Research Repository

    What would you like to view today?

    Assessment of laboratory methods for evaluating cassava genotypes for resistance to root rot disease

    Thumbnail
    View/Open
    S05ArtOnyekaAssessmentInthomDev.pdf (196.7Kb)
    Date
    2005
    Author
    Onyeka, T.J.
    Dixon, A.
    Ekpo, E.J.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Field evaluation of six cassava genotypes for resistance to root rot disease was compared with three rapid laboratory methods (whole root inoculation, root slice inoculation, and stem inoculation) for resistance screening. Both the field evaluation and the three laboratory methods separated the varieties into resistant and susceptible groups. Genotypes 30572 and 91/02324 were resistant while 92/0247, 92/0057 and TME-1 were susceptible. One genotype (30001) was not consistent in its reaction between field evaluation and laboratory assays. In the laboratory assays with three fungal pathogens, different pathogens varied in their levels of virulence on host genotypes. With the most virulent pathogen (Botryodiplodia theobromae), the majority of the genotypes reacted in the same way across trials with the root slice and whole root assays. Due to the good correlation between the whole root assay and the field results, we recommend this for the routine assessment of cassava resistance to root rot disease and for the analysis of virulence of pathogen isolates. However, because of the advantages in terms of economy of labour, space, time, quantity of root and inoculum required, the root slice assay could be used for the preliminary screening of large cassava accessions. The selected genotypes can then be further screened with the whole root inoculation method.
    https://dx.doi.org/10.1007/s11046-004-6156-z
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/1844
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1007/s11046-004-6156-z
    IITA Subjects
    Cassava; Plant Genetic Resources; Research Method
    Agrovoc Terms
    Cassava; Botryodiplodia Theobromae; Evaluation; Resistance; Root Rot; Screening Method; Genotypes
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Journals
    Mycopathologia
    Collections
    • Journal and Journal Articles5283
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository