• 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 cassava genotypes for resistance to cassava mosaic disease, cassava bacterial blight and cassava green mite at a lowland and mid-altitude site in Nigeria

    Thumbnail
    View/Open
    akparobi-assessment-1998.pdf (796.6Kb)
    Date
    1998
    Author
    Akparobi, S.O.
    Togun, A.O.
    Ekanayake, I.J.
    Type
    Journal Article
    Metadata
    Show full item record
    Abstract/Description
    Twelve cassava genotypes were evaluated in the field in two cropping seasons at two locations in Nigeria for their reaction to cassava mosaic disease (CMD), cassava bacterial blight (CBB) and cassava green mite (CGM), using visual injury scores as the index for resistance. Lowest indices for CMD were recorded at mid-altitude and were significantly different from lowland savanna indices. The highest injury scores for CMD, CBB and CGM were recorded 9 months after planting (MAP) which coincided with the dry period at both locations. TMS 30001 and TME1 showed resistance to CMD while TMS 30001, TMS 30572 and TMS 91934 were the most resistant to CBB. TME1, TMS 91934, TMS 30572 and TMS 50395 were moderately resistant to CGM. Leaf area and root yield of genotypes grown at the lowland site were higher than at mid-altitude. Genotypes with least leaf area and root yield had the highest injury scores for CMD and CBB in both locations. There was a significant positive correlation between CBB and CGM while a negative correlation was observed between root yield and CMD. Results suggest that selection for resistance to CBB may help breeders to develop cultivars resistant to CGM, and that CMD causes serious loss in cassava yields.
    https://doi.org/10.4314/acsj.v6i4.27790
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/5681
    Digital Object Identifier (DOI)
    https://doi.org/10.4314/acsj.v6i4.27790
    IITA Subjects
    Cassava; Pests Of Plants; Plant Breeding; Agronomy; Plant Diseases
    Agrovoc Terms
    Cassava; Genotypes; Pests; Resistance Varieties; Roots; Yields
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835

    Related items

    Showing items related by title, author, creator and subject.

    • Thumbnail

      Cassava production and processing in the Democratic Republic of Congo: COSCA working paper, No 22 

      Nweke, F.; Lutete, D.; Dixon, A.; Ugwu, B.; Ajobo, O.; Kalombo, N.; Bukaka, B. (2000)
      The importance of cassava relative to other crops in the cropping system was almost total; cassava was present in 70% of arable fields; maize and beans or peas were each present in 13% of arable fields and all other crops were present in 4%. Cassava was produced mostly for sale, yet it was not as important around market centers as in remote areas because imported rice and wheat products were easily accessible. Cassava land area was not expanding in many of the villages visited because of low-level ...
    • Thumbnail

      Molecular biodiversity of cassava begomoviruses in Tanzania: evolution of cassava geminiviruses in Africa and evidence for East Africa being a center of diversity of cassava geminiviruses 

      Ndunguru, J.; Legg, J.P.; Aveling, T.; Thompson, G.; Fauquet, Claude M. (2005)
      Cassava is infected by numerous geminiviruses in Africa and India that cause devastating losses to poor farmers. We here describe the molecular diversity of seven representative cassava mosaic geminiviruses (CMGs) infecting cassava from multiple locations in Tanzania. We report for the first time the presence of two isolates in East Africa: (EACMCV-[TZ1] and EACMCV-[TZ7]) of the species East African cassava mosaic Cameroon virus, originally described in West Africa. The complete nucleotide sequence ...
    • Thumbnail

      Recently released cassava varieties in the lake zone of Tanzania 

      Mkamilo, G.S.; Ndyetabula, I.L.; Jeremiah, S.C.; Merumba, S.M.; Kibura, J.; Karugaba, R.K; Chirimi, B.; Bagambisa, C.; Milala, P.; Chuwa, C.; Ngendello, T.; Legg, J.P.; Kanju, E.E.; Ntawuruhunga, Pheneas (2010)
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository