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

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    Authors
    Ntawuruhunga, Pheneas
    Whyte, J.
    Dixon, A.
    Rubaihayo, P.R.
    Date
    2009
    Language
    en
    Type
    Journal Article
    Review status
    Peer Review
    Accessibility
    Limited Access
    Metadata
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    Citation
    Ntawuruhunga, P., Whyte, J., Dixon, A. & Rubaihayo, P.R. (2009). Genotype by environment (G x E) interaction in cassava (Manihot esculenta Crantz) in Uganda. African Journal of Root and Tuber Crops, 7(1), 1-7
    Permanent link to cite or share this item: https://hdl.handle.net/10568/90827
    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.
    AGROVOC Keywords
    cassava; genotype by environment interaction; ammi; stability; adaptability
    Subjects
    CASSAVA; GENETIC IMPROVEMENT; HANDLING, TRANSPORT, STORAGE AND PROTECTION OF AGRICULTURAL PRODUCTS; PLANT PRODUCTION; LAND USE
    Countries
    Uganda
    Regions
    Africa; Eastern Africa
    Organizations Affiliated to the Authors
    International Institute of Tropical Agriculture; Sierra Leone Agricultural Research Institute; Makerere University
    Collections
    • IITA Journal Articles [4887]

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