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    AFLP analysis of African cassava (Manihot esculenta Crantz) germplasm resistant to the cassava mosaic disease (CMD)

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    Date
    2000
    Author
    Fregene, Martin A.
    Bernal, A.
    Duque E., Myriam Cristina
    Dixon, Alfred G.O.
    Tohme, Joseph M.
    Type
    Journal Article
    Metadata
    Show full item record
    Abstract/Description
    Amplified fragment length polymophism was assessed in 20 land races and nine elite lines of cassava from Africa, resistant and susceptible to the cassava mosaic disease (CMD). Eleven accessions from a representative core collection from Latin America, previously studied by AFLPs, were included as a reference. AFLP data from all accessions was analyzed by both the unweighted pair group mean average (UPGMA) and multiple cluster analysis (MCA) methods of analysis. Genetic differentiation between clusters and the coefficient of genetic differentiation was also calculated. Results reveal a genetic divergence between African and Latin American accessions, although some overlap was found between them. African land races resistant to CMD, were also found to be genetically differentiated from susceptible land races and from resistant elite lines. AFLP analysis identified a considerable number of duplicates in the African accessions, suggesting a sizeable percentage of redundancy. A unique AFLP fragment, found in a relatively high frequency in African accessions, but absent in the Latin American accessions, was found to be associated with branching pattern by QTL mapping in an F1 progeny derived from African and Latin American parents. The likely source and the utility of the unique AFLP fragment in understanding the processes of genetic divergence in Africa is discussed.
    https://dx.doi.org/10.1007/s001220051339
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/603
    Non-IITA Authors ORCID
    Joe Tohmehttps://orcid.org/0000-0003-2765-7101
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1007/s001220051339
    Agrovoc Terms
    Genetic Markers; Genetic Distance; Manihot Esculenta; Marcadores Genéticos; Distancia Genética
    Regions
    Africa; Latin America
    Journals
    Theoretical and Applied Genetics
    Collections
    • Journal and Journal Articles4835
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