• 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?

    Genetics of resistance to Striga and Alectra in cowpea

    Thumbnail
    View/Open
    atokple-genetics-1995.PDF (679.2Kb)
    Date
    1995
    Author
    Atokple, I.
    Singh, B.
    Emechebe, A.
    Type
    Journal Article
    Metadata
    Show full item record
    Abstract/Description
    The parasitic weeds Striga gesnerioides (Willd.) Vatke and Alectra vogelli (Benth.) cause considerable demage to cowpea [ Vigna unguiculata (L.) Walp] in the semiarid regions of Africa. Systematic screening has revealed few cowpea varieties to be resistant. Of these, B 301 is resistant to both striga and alectra; IT82D-849 is resistant to striga but susceptible to alectra; SUVITA-2 Is resistant to striga In Burkina Faso only but susceptible to alectra, and IT81D-994 is moderately resistant to striga as well as alectra. Previous genetic studies revealed a single dominant gene for striga and duplicate dominant genes for alectra resistance in B 301. This study was undertaken to elucidate the mode of inheritance of striga resistance in IT82D-849 and establish allelic relationships among genes for resistance to striga and alectra in other varieties. Relevant genetic populations were screened using pot culture technique. Results showed that resistance in IT82D-849 to striga also is controlled by a single dominant gene but is different from that found in B 301. Also, the single dominant gene possessed by SUVITA-2 against the striga strain from Burkina Faso is nonallelic to the single dominant genes in B 301 and IT82D-849. The duplicate dominant genes in B 301 against alectra are nonallelic to a single gene in IT81D-994. Screening the parents of IT82D-849 and allelic test revealed that its source of striga resistance is from Emma 60. Gene symbols Rsg 1 , Rsg 2 , and Rsg 3 are proposed for resistance to Striga gesnerioides In B 301, IT82D-849, and SUVITA-2, respectively, and gene symbols Rav 1 , Rav 2 , and Rav 2 , are proposed for resistance to Alectra vogelli in B 301 and IT81D-994.
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/4512
    IITA Subjects
    Cowpea; Pests Of Plants; Weeds
    Agrovoc Terms
    Cowpeas; Striga Gesnerioides; Alectra Vogelii; Parasites
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository