• Contact Us
    • Send Feedback
    • Login
    View Item 
    •   Home
    • Journal and Journal Articles
    • Journal and Journal Articles
    • View Item
    •   Home
    • Journal and Journal Articles
    • Journal and Journal Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    Whole Repository
    CollectionsIssue DateRegionCountryHubAffiliationAuthorsTitlesSubject
    This Sub-collection
    Issue DateRegionCountryHubAffiliationAuthorsTitlesSubject

    My Account

    Login

    Welcome to the International Institute of Tropical Agriculture Research Repository

    What would you like to view today?

    Performance assessment of drought tolerant maize hybrids under combined drought and heat stress

    Thumbnail
    View/Open
    U18ArtMesekaPerformanceInthomNodev.pdf (1.088Mb)
    Date
    2018
    Author
    Meseka, S.
    Menkir, A.
    Bossey, B.
    Mengesha Abera, W.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Drought and high temperature are two major factors limiting maize productivity in sub-Saharan Africa. An increase in temperature above 30 °C reduces yield by 1% under optimal rain-fed condition and by 1.7% under drought stress (DS) and up to 40% under combined drought and heat stress (DSHTS). Approaches that improve performance under the two stresses are essential to sustain productivity. The objectives of this study were to (i) assess the extent of variation in tolerance to DSHTS from among the existing best drought tolerant (DT) hybrids; (ii) examine the response patterns of the hybrids to DSHTS; (iii) identify traits that contributed to better performance under DSHTS; and (iv) select the best hybrids with tolerance to DSHTS stress. We evaluated 40 DT hybrids under DSHTS, DS, and well-watered (WW) conditions for three years. Highly significant (p < 0.001) differences were found among hybrids for grain yield and other traits. Moderately to low repeatability values were detected for grain yield under DS (0.63) and under DSHTS (0.48). Grain yield under DS was not correlated with grain yield under DSHTS (r = 0.29; p = 0.06), but it was correlated with grain yield under WW (r = 0.74; p < 0.001). Grain yield was strongly correlated with ears per plant, ear and pant aspects, days to anthesis and silking under both DS and DSHTS. Tassel blast accounted for 28% of the yield reduction under DSHTS. The top five DT hybrids produced 9 to 26% more grain yields than the best commercial hybrid. Three hybrids produced high grain yields under DTHTS and DS as well as under WW. These hybrids will be tested further in collaboration with partners for possible release.
    https://dx.doi.org/10.3390/agronomy8120274
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/4935
    Non-IITA Authors ORCID
    SILVESTRO MESEKAhttps://orcid.org/0000-0003-1004-2450
    Abebe Menkirhttps://orcid.org/0000-0002-5907-9177
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3390/agronomy8120274
    Research Themes
    BIOTECH & PLANT BREEDING
    IITA Subjects
    Maize; Plant Breeding
    Agrovoc Terms
    Drought; Heat Stress; Drought Tolerance; Yields; Nigeria; West Africa
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Journals
    Agronomy
    Collections
    • Journal and Journal Articles4835
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository