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    Genetic diversity, population structure and inter-trait relationships of combined heat and drought tolerant early-maturing maize inbred lines from west and central Africa

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    Journal Article (3.181Mb)
    Date
    2020-09-04
    Author
    Osuman, A.S.
    Badu-Apraku, B.
    Ifie, B.E.
    Tongoona, P.
    Obeng-Bio, E.
    Garcia-Oliveira, A.L.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Adequate knowledge and understanding of the genetic diversity and inter-trait relationships among elite maize inbred lines are crucial for determining breeding strategies and predicting hybrid performance. The objectives of this study were to investigate the genetic diversity of 162 early maturing white and yellow tropical maize inbred lines, and to determine the population structure, heterotic groups and inter-trait relationships among the lines. Using 9684 DArT single nucleotide polymorphism (SNP) markers, a gene diversity (GD) of 0.30 was recorded for the inbred lines with polymorphic information content (PIC) ranging from 0.08 to 0.38. The genetic relatedness among the inbred lines evaluated revealed six different groups based on the history of selection, colour of endosperm and pedigree. The genotype-by-trait (GT) biplot analysis identified inbred 1 (TZEI 935) as outstanding in terms of combined heat and drought (HD) tolerance with the base index analysis identifying 15 superior inbreds in the HD environment. A wide range of genetic variability was observed among the inbred lines, indicating that they are an invaluable resource for breeding for HD tolerance in maize breeding programmes, especially in West and Central Africa.
    https://dx.doi.org/10.3390/agronomy10091324
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7724
    IITA Authors ORCID
    BAFFOUR BADU-APRAKUhttps://orcid.org/0000-0003-0113-5487
    Garcia-Oliveira ALhttps://orcid.org/0000-0001-8561-4172
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3390/agronomy10091324
    Research Themes
    Biotech and Plant Breeding
    IITA Subjects
    Agronomy; Maize; Plant Breeding; Plant Production; Value Chains
    Agrovoc Terms
    Genetic Diversity; Genetic Markers; Maize; Maturity; Drought Tolerance; Heat Tolerance
    Regions
    Africa; Central Africa; West Africa
    Countries
    Ghana; Nigeria
    Hubs
    Headquarters and Western Africa Hub
    Journals
    Agronomy
    Collections
    • Journal and Journal Articles4835
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