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    Genotype by environment (G x E) interaction in cassava (Manihot esculenta Crantz) in Uganda

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    Date
    2009
    Author
    Ntawuruhunga, Pheneas
    Whyte, J.
    Dixon, A.
    Rubaihayo, P.R.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Genotype (G) by environment (E) interaction (GEI) in cassava was studied using 10 genotypes in a multilocational trial in Uganda at different altitudes for 2 years. The study investigated the magnitude of GEI and diagnosed the underlying causal factors of the G × E pattern. The analysis of variance indicated that the effects of E, G, and GEI were significant for storage root number, storage root size, storage root girth, fresh storage root weight, and dry yield, but not for dry matter content. Additive Main Effects and Multiplicative Interactions (AMMI) was used to assist the selection and zonation of the environments into homogenous ecosystems. Genotype TMS I 92/0057 was found to have broad adaptation, high yield, and stability, with temperature being one of the underlying causal factors of the interaction. Namulonge (mid-altitude) was identified as a stable environment and could be considered as a site for broad selection.
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/2859
    IITA Subjects
    Cassava; Genetic Improvement; Handling, Transport, Storage And Protection Of Agricultural Products; Plant Production; Land Use
    Agrovoc Terms
    Cassava; Genotype By Environment Interaction; Ammi; Stability; Adaptability
    Regions
    Africa; East Africa
    Countries
    Uganda
    Collections
    • Journal and Journal Articles4835
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