• 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?

    Breeding potatoes for developing countries using wild tuber bearing Solanum spp. and ploidy manipulations

    Thumbnail
    Date
    1994
    Author
    Ortiz, R.
    Iwanaga, Masaru
    Peloquin, S.J.
    Type
    Journal Article
    Metadata
    Show full item record
    Abstract/Description
    The use of ploidy manipulations in potato breeding has been successfully applied by breeders at the International Potato Center (CIP) as a tool for germplasm enhancement and for the introduction of desirable genes of wild species into the cultivated gene pool. This methodology consists in reducing the ploidy level using haploids (2n = 2x = 24) and increasing it through the utilization of 2n gametes. It takes advantage of working at the 2x level to develop genotypes which combine multiple pest/disease resistance and a high frequency of 2n gametes. The specific resistances are obtained mainly from wild species. Then, desirable attributes are transferred to the 4x level by unilateral sexual polyploidization (4x x 2x crosses) using first division restitution (FOR) 2n pollen. CIP's work demonstrates that this approach has been very efficient for the transmission of resistance to cyst and root-knot nematodes, bacterial wilt, early blight and potato tuber moth as well as producing high yielding 4x genotypes which also have yield stability over environments. This recently developed germplasm is now available for potato breeders in developing countries who can produce high yielding and resistant 4x clones adapted to the growing conditions of their countries.
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/5603
    IITA Subjects
    Plant Breeding; Genetic Improvement; Plant Diseases; Plant Production
    Agrovoc Terms
    Genotypes; Yields; Germplasm
    Regions
    Africa; Acp; West Africa; Europe; North America
    Countries
    Nigeria; Italy; United States
    Collections
    • Journal and Journal Articles4835
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository