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    Efficacy of maize inbred testers with varying levels of resistance to Striga for classifying Striga-resistant yellow-maize lines into heterotic groups

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    Journal Article (2.402Mb)
    Date
    2021-09-23
    Author
    Zebire, D.
    Menkir, A.
    Adetimirin, V.
    Mengesha Abera, W.
    Meseka, S.K.
    Gedil, M.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Identifying efficient testers for separating maize (Zea mays L.) inbred lines into heterotic groups can facilitate the development of superior hybrids. Striga-resistant yellow-maize inbred lines developed at the International Institute of Tropical Agriculture (IITA) do not have well established heterotic groups. This study was conducted to identify efficient testers for classifying yellow-maize inbred lines into heterotic groups. Thirty Striga-resistant inbred lines were crossed with three testers having varying levels of resistance to Striga. A trial comprising 90 testcrosses and two hybrid checks was conducted at two locations in Nigeria for 2 years under Striga-infested and non-infested conditions. The approach that involved specific combining ability (SCA) effects and mean grain yields was found to be more efficient than the heterotic group’s specific and general combining ability (HSGCA) grouping method in separating the 30 inbred lines into three heterotic groups. The tolerant and resistant testers were highly efficient in grouping the inbred lines into heterotic groups under Striga-infested and non-infested conditions using the two approaches. Striga-resistant yellow inbred lines assigned to two of the three major heterotic groups could be used as parents for developing superior hybrids and/or synthetics and for generating source populations for developing new maize inbred lines.
    Acknowledgements
    We acknowledge the support of technical and data management staff of the Maize Improvement Program of IITA in field operations and data analysis.
    https://dx.doi.org/10.1080/15427528.2021.1979156
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/8003
    IITA Authors ORCID
    Abebe Menkirhttps://orcid.org/0000-0002-5907-9177
    Wende Mengeshahttps://orcid.org/0000-0002-2239-7323
    SILVESTRO MESEKAhttps://orcid.org/0000-0003-1004-2450
    Melaku Gedilhttps://orcid.org/0000-0002-6258-6014
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1080/15427528.2021.1979156
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Disease Control; Food Security; Maize; Plant Breeding; Plant Production
    Agrovoc Terms
    Maize; Striga Hermonthica; Disease Resistance; Hybrids; Varieties
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    Journal of Crop Improvement
    Collections
    • Journal and Journal Articles4842
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