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    Association studies between grain yield and agronomic traits of a MARS maize (Zea mays L.) population under drought and non-stress condition

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    U19ArtBankoleAssociationInthomDev.pdf (597.2Kb)
    Date
    2019-10-30
    Author
    Bankole, F.
    Menkir, A.
    Olaoye, G.
    Olakojo, O.
    Gedil, M.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    The study aimed at examining the associations between yield and other traits under drought stress and non-stress conditions. A total of 150 MARS testcrosses were evaluated under both conditions at the International Institute of Tropical Agriculture substation for two years under during the dry season. Genotypic and phenotypic correlation, multiple stepwise regression and path co-efficient analyses were carried out to examine the relationship among the traits under both environments. Results showed anthesis-silking interval, days to silking, husk cover and plant aspect were significantly associated with yield under drought condition at both genotypic and phenotypic levels. Yield was positively correlated with plant and ear height but had a negative correlation with plant and ear aspect at both levels under well-watered condition. Regression analysis showed that ears per plant, plant aspect, ear aspect, days to silking, leaf death and plant height had a direct effect on yield, contributing a total of 71.1 % of observed variation under drought, while ears per plant, ear aspect, plant aspect, days to pollen shed, days to silking and plant height contributed about 31.42 % to yield under well-watered conditions. The study concluded that these traits be used as selection criteria as it will aid improvement of maize yield.
    https://dx.doi.org/10.14720/aas.2019.114.1.9.
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/6550
    Non-IITA Authors ORCID
    Abebe Menkirhttps://orcid.org/0000-0002-5907-9177
    Melaku Gedilhttps://orcid.org/0000-0002-6258-6014
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.14720/aas.2019.114.1.9.
    Research Themes
    BIOTECH & PLANT BREEDING
    IITA Subjects
    Genetic Improvement; Maize; Plant Breeding; Plant Genetic Resources
    Agrovoc Terms
    Maize; Associations; Grain; Yields; Drought; Phenotypic Variation; Abiotic Stress; Biotic Stress
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Journals
    Acta Agriculturae Slovenica
    Collections
    • Journal and Journal Articles4842
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