• 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?

    Ploidy and genome composition of Musa germplasm at the International Institute of Tropical Agriculture (IITA)

    Thumbnail
    View/Open
    U06ArtPillayPloidynNothomNodev.pdf (569.0Kb)
    Date
    2006
    Author
    Pillay, M.
    Ogundiwin, E.
    Tenkouano, A.
    Dolezel, Jaroslav
    Type
    Journal Article
    Metadata
    Show full item record
    Abstract/Description
    Musa spp (bananas and plantains) constitute a hybrid-polyploid complex and are classified according to different genome compositions such as AA, BB, AB, AAA, AAB, ABB, AAAA, ABBB, AAAB and AABB. Knowledge of ploidy and exact genome compositions of the parental material is essential for Musa breeding. This study determined the ploidy levels and genome composition of the Musa germplasm collection, constituting over 300 accessions, at the International Institute of Tropical Agriculture in Nigeria and Uganda. Flow cytometric analysis of nuclear DNA content was used to estimate ploidy levels, while genome composition was ascertained with RAPD markers that are specific for the A and B genomes of Musa. It was determined that at least 8% of the plants in the germplasm collection were miss-classified in terms of ploidy and/or genome composition. The cultivars 'Pisang awak', 'Foulah 4' and 'Nzizi', previously classified as triploids, were found to be tetraploids by flow cytometry and conventional root tip chromosome counts. Similarly, cultivars that were previously classified as diploids including 'Too', and 'Toowoolee' were found to be triploids in our analysis. Ploidy and genome classification in Musa was generally determined from morphological characteristics. While our study showed that such a system is not always reliable, it was interesting to find that none of the plantains in the germplasm collection were miss-classified with regards to both ploidy and genome composition.
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/3262
    IITA Subjects
    Genetic Improvement; Plant Breeding; Banana; Plantain
    Agrovoc Terms
    Bananas; Plantains; Genomes; Ploid
    Regions
    Africa; West Africa; East Africa
    Countries
    Nigeria; Uganda
    Collections
    • Journal and Journal Articles4836
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository