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    Micropropagation of white yam (Dioscorea rotundata Poir.)

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    Date
    1992
    Author
    Ng, S.Y.C.
    Type
    Book Chapter
    Metadata
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    Abstract
    White yam (Dioscorea rotundata Poir.) belongs to the family Dioscoreaceae, genus Dioscorea. It is also known as white Guinea yam, Guinea yam, and 8-months' yam. The center of origin of white yam is in West Africa. D. rotundata, a cultigen, is so close to D. cayenensis that it has been regarded as a subspecies. It belongs to section Enantiophyllum, which comprises the most economically useful species of Dioscorea. D. rotundata appears to be of hybrid origin. It was speculated by Coursey (1976) that one parent is D. cayenensis, a forest species, adapted to a short dry season and having limited tuber dormancy. The other must be a savanna species, D. praehensilis, which bears the greatest resemblance to some D. rotundata forms, although D. abyssinica and D. togoensis may also have contributed. It was taken early in post-Columbian times to the West Indies, but it is not grown in Asia. The chromosome number is probably similar to D. cayenensis, as suggested by Purseglove (1976), and it was reported by Coursey (1976) as 2n = 2x = 40.
    https://doi.org/10.1007/978-3-662-07770-2_9
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/5401
    Digital Object Identifier (DOI)
    https://doi.org/10.1007/978-3-662-07770-2_9
    IITA Subjects
    Yam
    Agrovoc Terms
    Regeneration; Micropropagation; White Yam
    Regions
    Africa; West Africa
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    • Books and Book Chapters860
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