• 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?

    Genotype by environment effects on promiscuous nodulation in soybean (Glycine max L. Merrill)

    Thumbnail
    View/Open
    U17ArtAgoyiGenotypeNothomDev.pdf (3.022Mb)
    Date
    2017
    Author
    Agoyi, E.E.
    Odong, T.L.
    Tumuhairwe, J.B.
    Chigeza, G.
    Diers, B.W.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Background Understanding factors influencing the expression of a trait is key in designing a breeding program. Genotype by environment interaction has great influence on most quantitative traits. Promiscuous nodulation is a trait of importance for soybean production in Africa, because of the soil bacteria Bradyrhizobium japonicum not being indigenous in most African soils. Most soybean cultivars require B. japonicum for nodulation leading to the need for seed inoculation before sowing soybean in Africa. Few cultivars have capability to nodulate with Bradyrhizobia spp. that are different from B. japonicum and native in African soils. Such cultivars are termed “promiscuous cultivars.” Field experiments were conducted in six locations in Uganda for two seasons, to investigate the extent of environmental influences on the nodulation ability of promiscuous soybean genotypes. Results Additive main effect and multiplicative interaction effects showed highly significant environment and genotype by environment (G × E) interaction effects on all nodulation traits. G × E interaction contributed more to the total variation than genotypes. The genotypes Kabanyolo I and WonderSoya were the most stable for nodules’ dry weight (NDW), which is the nodulation trait the most correlated with grain yield. Genotype UG5 was the most stable for nodules’ number (NN), and Nam II for nodules’ effectiveness (NE). The genotype NamSoy 4M had the highest performance for NN, NFW, and NDW, but was less stable. WonderSoya had the highest NE. Genotype and genotype by environment analysis grouped environments into mega-environments (MEs), and four MEs were observed for NDW, with NamSoy 4M the winning genotype in the largest ME, and Kasese B the ideal environment for that nodulation trait. Conclusion This study provides information that can guide breeding strategies. The low genetic effect that led to high environmental and G × E interaction effects raised the need for multi-environments testing before cultivar selection and recommendation. The study revealed genotypes that are stable and others that are high performing for nodulation traits, and which can be used as parental lines in breeding programs.
    http://dx.doi.org/10.1186/s40066-017-0107-7
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/1888
    Digital Object Identifier (DOI)
    http://dx.doi.org/10.1186/s40066-017-0107-7
    IITA Subjects
    Genetic Improvement; Grain Legumes; Plant Genetic Resources; Soybean
    Agrovoc Terms
    Nodulation; Soybeans; Bradyrhizobium Spp; Promiscuous Soybean; Genotype By Environment; Soybeans
    Regions
    Africa; East Africa
    Countries
    Uganda
    Journals
    Agriculture & Food Security
    Collections
    • Journal and Journal Articles5283
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository