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    Tetraploids, triploids and 2n pollen from diploid interspecific crosses with cassava

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    Date
    1990
    Author
    Hahn, S.K.
    Bai, K.V.
    Asiedu, Robert
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Interspecific crosses of five cultivated cassava varieties (2n=36) were made with two related Manihot species, M. epruinosa (2n=36) and M. glaziovii (2n=36). From these diploid interspecific crosses, four spontaneous tetraploids (2n=4x=72) and two triploids (2n=3x=54) were isolated for the first time in cassava. Occurrence of relatively high frequencies (0.1%–35.6%) of 2n pollen and of apomixis seems to be associated with sexual polyploidization. The tetraploids and triploids were very vigorous and one of the tetraploids performed as well as the best variety in uniform yield trials conducted in Nigeria. These spontaneous polypoloids provide greater genetic variation and offer an opportunity to breed radically new cassava varieties. Approaches for isolating and utilizing the polyploid cassava clones for varietal and population improvement are discussed.
    https://doi.org/10.1007/BF00226148
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/6060
    Digital Object Identifier (DOI)
    https://doi.org/10.1007/BF00226148
    IITA Subjects
    Cassava
    Agrovoc Terms
    Cassava; Polyploidy; Pollen; Apomixis
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835
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