• 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?

    Secondary metabolites content may clarify the traditional selection process of the greater yam cultivars (Dioscorea alata L.)

    Thumbnail
    View/Open
    S18ArtLebotSecondaryInthomDev.pdf (703.3Kb)
    Date
    2018-08
    Author
    Lebot, V.
    Malapa, R.
    Abraham, K.
    Molisale, T.
    Van Kien, N.
    Gueye, B.
    Waki, J.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Dioscorea alata L. is one of the most widely grown and economically important yam species. Hundreds of accessions are maintained ex situ in germplasm collections and have been characterized with descriptors but new tools are still needed to assess tuber chemical composition. The objectives of the present study were to analyze saponins and catechins profiles in 388 D. alata cultivars (landraces) from distant geographical sources (Nigeria, Vietnam, Papua New Guinea and Vanuatu) and to compare them with those of 162 selected hybrids. The relationships between these compounds and tuber flesh oxidation and browning were also studied in order to understand their possible role in the ancient cultivars selection process. Dioscin and gracillin, the most documented Dioscorea saponins, were absent among the 550 D. alata cultivars and hybrids analyzed using HP-TLC. Two saponins and four catechins were quantitated, including epicatechin. Mean total catechins and saponins values were very low for most cultivars and higher mean values were found in hybrids. Correlation coefficients revealed possible relationships between total saponins and catechins contents with speed of oxidation, presence of mucilage and flour colour. Distribution of cultivars values within each country indicate that these were mostly selected for their low saponins and catechins contents through simple visual assessment. Metabolite profiles can be used to improve the phenotyping efficiency of D. alata hybrids generated through conventional breeding.
    https://dx.doi.org/10.1007/s10722-018-0647-0
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/4639
    Non-IITA Authors ORCID
    Badara GUEYEhttps://orcid.org/0000-0003-3157-8772
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1007/s10722-018-0647-0
    Research Themes
    BIOTECH & PLANT BREEDING
    IITA Subjects
    Plant Breeding
    Agrovoc Terms
    Dioscorea Alata; Domestication; Saponins; Tuber
    Journals
    Genetic Resources and Crop Evolution
    Collections
    • Journal and Journal Articles4835
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository