• 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?

    Genetic and phenotypic association between yield components in hybrid sorghum (Sorghum bicolor (L.) Moench) populations

    Thumbnail
    View/Open
    Kenga et al 2006 Genetic and phenotypic - Euphytica.pdf (150.9Kb)
    Date
    2006
    Author
    Kenga, R.
    Tenkouano, A.
    Gupta, S.C.
    Alabi, S.O.
    Type
    Journal Article
    Metadata
    Show full item record
    Abstract/Description
    The magnitude of genetic expression and associations among traits are important for the prediction of response to selection in diverse environments and provide the basis for planning and evaluating breeding programs. In this regard, a cross classification mating design was used to produce hybrid sorghum populations, which were evaluated in a randomized completed block design with three replications at four environments in Northern Cameroon. Data on grain yield, days to anthesis, plant height, inflorescence length, threshing percentage and seed mass were collected and subjected to statistical genetic analyses. Significant genotype × environment interaction effects were observed for all traits. Genetic variance was essentially attributed to additive gene effects, with dominance variance for grain yield being negligible. However, the reverse was observed for threshability. Genetic variance components were much higher for plant height and grain yield than for days to anthesis, seed mass and threshability. Heritability estimates for plant height and inflorescence length were high (77 and 54 percent respectively) while the estimates for grain yield and threshability were low (14 and 5 percent respectively). Grain yield had positive genotypic correlation with most of the traits. Days to anthesis were negatively correlated with vegetative and reproductive traits. These results suggest that improvement of days to anthesis, plant height, and inflorescence length should be faster because of higher heritabilities and greater phenotypic variation. However, selection for earliness and reduced plant height would not be possible without hampering grain yield. Selecting for yield primary components namely inflorescence length and seed weight would be effective for increasing production. In addition, optimizing agronomic practices and improved experimental design would increase the selection efficiencies.
    http://dx.doi.org/10.1007/s10681-006-9108-5
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/3034
    Digital Object Identifier (DOI)
    http://dx.doi.org/10.1007/s10681-006-9108-5
    IITA Subjects
    Farm Management; Food Security; Livelihoods; Plant Breeding; Plant Genetic Resources; Agribusiness; Plant Production; Pests Of Plants; Genetic Improvement; Disease Control; Plant Diseases; Handling, Transport, Storage And Protection Of Agricultural Products
    Agrovoc Terms
    Breeding; Genetic Correlation; Heritability; Hybrid Sorghum; Yield Components; Yield; Inflorescence Length; Anthesis
    Regions
    Africa; Asia; Central Africa; South Asia; West Africa
    Countries
    Cameroon; India; Nigeria
    Collections
    • Journal and Journal Articles4835
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository