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    Genetic diversity of tropical maize inbred lines combining resistance to Striga hermonthica with drought tolerance using SNP markers

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    S17ArtMengeshaGeneticInthomNodev.pdf (625.2Kb)
    Date
    2017-06-13
    Author
    Mengesha, W.
    Menkir, A.
    Unachukwu, N.N.
    Meseka, S.K.
    Farinola, A.
    Girma Tessema, G.
    Gedil, M.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Striga hermonthica and drought are the major stresses limiting maize yields in sub-Saharan Africa. The search for diverse maize lines’ tolerance to drought and resistance to S. hermonthica (DTSTHR) is very crucial for yield improvement in areas affected by the two stresses. Understanding the genetic diversity among the lines is important to develop cultivars resistant to S. hermonthica and tolerant to drought. The lines were developed from biparental crosses of drought-tolerant and Striga-resistant lines. A total of 128 DTSTHR maize lines were characterized using single-nucleotide polymorphism (SNP) markers. Results of the cluster analysis based on 3297 SNP markers showed four distinct groups consistent with the pedigrees of the lines. Furthermore, model-based analysis also formed the same groups of the DTSTHR lines. Integrating the pedigree information with combining ability and the SNP analyses may provide defined heterotic groups for maize improvement work in West and Central Africa. These results also help breeders to utilize DTSTHR lines present at IITA for developing biparental crosses without disrupting the heterotic groups they have established in their breeding programmes.
    https://dx.doi.org/10.1111/pbr.12479
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/1921
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1111/pbr.12479
    Research Themes
    BIOTECH & PLANT BREEDING
    IITA Subjects
    Genetic Improvement; Maize; Plant Breeding; Plant Genetic Resources
    Agrovoc Terms
    Striga Hermonthica; Genetic Variation; Inbred Lines; Snp Markers; Drought Tolerance; Maize; Breeding; Dna; Genotyping
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Journals
    Plant Breeding
    Collections
    • Journal and Journal Articles5283
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