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    Genetic analysis of gain yield of IITA and CIMMYT earlymaturing maize inbreds under Strigainfested and lowsoil nitrogen environments

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    Date
    2014
    Author
    Ifie, B.E.
    Badu-Apraku, B.
    Gracen, V.E.
    Danquah, E.Y.
    Type
    Journal Article
    Metadata
    Show full item record
    Abstract/Description
    Breeding maize (Zea mays L.) hybrids resistant to Striga and tolerant to low soil nitrogen (low-N) will reduce grain yield losses due to stresses in West Africa (WA). Studies were conducted to determine if selection for Striga resistance and/or drought tolerance in early-maturing maize populations improved low-N tolerance in hybrids derived from selected inbreds from International Institute of Tropical Agriculture (IITA) and International Centre for Maize and Wheat Improvement (CIMMYT) under Striga-infested, low-N and optimum environments in Nigeria. One hundred and fifty hybrids developed from crosses involving 30 lines using North Carolina Design II plus six checks were evaluated at two locations each under low-N, artificial Striga infestation, and optimum environments for 2 yr. Lines with combined resistance or tolerance to Striga as well as low-N were identified. Striga-resistant– as well as low-N–tolerant hybrids with outstanding performance under both stress environments could be obtained through the accumulation of favorable alleles for resistance or tolerance in both parental lines. Although selection for Striga resistance and/or drought tolerance resulted in improved performance of genotypes under low-N, it is important to test genotypes under low-N to identify those with outstanding performance under the target stress. ENT 11 × TZEI 4 and TZEI 65 × ENT 11 were identified as the most stable and high-yielding hybrids.
    https://dx.doi.org/10.2135/cropsci2014.07.0470
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/1108
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.2135/cropsci2014.07.0470
    IITA Subjects
    Maize
    Agrovoc Terms
    Maize; Striga; Wheat; Nitrogen; Grain
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Journals
    Crop Science
    Collections
    • Journal and Journal Articles4469
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