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    Induction of sprouting in dormant yam (Dioscorea spp.) tubers with inhibitors of gibberellins

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    S03ArtShiwachiInductionInthomNodev.pdf (141.8Kb)
    Date
    2003-04
    Author
    Shiwachi, H.
    Ayankanmi, T.G.
    Asiedu, Robert
    Onjo, M.
    Type
    Journal Article
    Journal Article
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    Abstract/Description
    A reliable means to induce sprouting in dormant seed tubers of yams (Dioscorea species) is required to enhance flexibility in planting date and rate of propagation of the crop. Experiments were conducted to assess the potential of two gibberellin inhibitors, Uniconazole-P and Prohexadione-calcium, to induce sprouting in tubers from three varieties of D. rotundata and four of D. alata.Uniconazole-P and Prohexadione-calcium shortened the period of dormancy in tubers of some varieties. In others, they either had no effect or extended dormancy. The varietal responses were also influenced by whether the tubers were treated at harvest (before shoot senescence) or four weeks after harvest by which time shoots had senesced fully. Tubers stored in darkness at a constant temperature of 30◦ C sprouted earlier but lost weight faster than did those stored under natural daylight and ambient temperature. The apparent slow action of Uniconazole-P and Prohexadione-calcium, and their variable effectiveness in relation to variety, would limit their usefulness in seed or breeding programmes, or in determining treatment timing and the best storage environment for the tubers after treatment.
    https://doi.org/10.1017/S001447970200114X
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/4165
    Digital Object Identifier (DOI)
    https://doi.org/10.1017/S001447970200114X
    IITA Subjects
    Yam
    Agrovoc Terms
    Yams; Dioscorea; Sprouting
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835
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