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    Breeding new sweetpotato genotypes combining elevated content of two antagonistic traits of high dry matter and beta-carotene content in a high root yield background

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    Journal Article (850.4Kb)
    Date
    2019
    Author
    Afuape, S.O.
    Tongoona, P.B.
    Asante, I.K.
    Egesi, C.N.
    Nwaigwe, G.
    Offei, S.K.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    This study was embarked upon to stack two key but inversely associated sweetpotato traits (dry matter and beta-carotene content) through conventional breeding methods. Thirty-seven elite sweetpotato genotypes were evaluated for both traits, and 15 parents comprising five orange-, five yellow- and five white-fleshed genotypes were selected from the 37 for hybridization. Using bi-parental mating fashion, an F1 progeny population for both traits was developed. Of the 13 families developed, eight families had above 30% of the progenies made of orange-fleshed (high beta-carotene) genotypes with three families having at least 50% of the progenies as OFSP. All the families (except two) showed wide variation for beta-carotene content (range 0.15–12.39 mg/100gFW) with some progenies exhibiting transgressive segregation. For dry matter content, most of the progenies across families had dry matter content > 30%. Overall, 17 high yielding F1 genotypes that combined elevated beta-carotene and dry matter content were identified. These 17 genotypes showed that although a strong inverse relationship exists between dry matter and beta-carotene, the relationship does not make the development of genotypes expressing both traits totally impossible through conventional breeding. These 17 superior genotypes that combine both traits will also serve as elite genetic background for many African sweetpotato breeding platforms in their quest to develop OFSP genotypes that meet the food culture of many African societies.
    https://dx.doi.org/10.1007/s10681-019-2532-0
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/6820
    IITA Authors ORCID
    Chiedozie Egesihttps://orcid.org/0000-0002-9063-2727
    Non-IITA Authors ORCID
    Chiedozie Egesihttps://orcid.org/0000-0002-9063-2727
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1007/s10681-019-2532-0
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Food Security; Nutrition; Plant Breeding; Plant Health; Plant Production
    Agrovoc Terms
    Sweet Potatoes; Germplasm; Dry Matter; Carotenoids; Food Security; Breeding; Genotypes
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    Euphytica
    Collections
    • Journal and Journal Articles4835
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