• Contact Us
    • Send Feedback
    • Login
    View Item 
    •   Home
    • Conference Documents
    • Conference Documents
    • View Item
    •   Home
    • Conference Documents
    • Conference Documents
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    Whole Repository
    CollectionsIssue DateRegionCountryHubAffiliationAuthorsTitlesSubject
    This Sub-collection
    Issue DateRegionCountryHubAffiliationAuthorsTitlesSubject

    My Account

    Login

    Welcome to the International Institute of Tropical Agriculture Research Repository

    What would you like to view today?

    Determination of optimum sett size for white guinea yam (Dioscorea rotundata Poir.) seed yam production: trends in sprouting in the presprout nursery and field performance

    Thumbnail
    Date
    1994
    Author
    Gyansa-Ameyyaw, C.E.
    Hahn, S.K.
    Álvarez, M.N.
    Doku, E.V.
    Type
    Conference Paper
    Metadata
    Show full item record
    Abstract/Description
    Six weight-classes of white guinea yam (Dioscòrea rotundata Poir.) setts—2–5, 5.01–10, 10.01–20, 20.01–30, 30.01–40, and 40.01–50 g—were presprouted in fresh, moist sawdust in open-air, propagation beds. The 2–5 g and 5.01–10 g classes were described as microsetts. Three natural groups patterned along the various phases of the sigmoid curve, within which the classes did not perform differently were evident at 26 days after planting (DAP), for sets at the leafy-and leafless-shoots stage. The group I classes were: 20.01–30 g, 30.01–40 g, and 40.01–50 g, while group II comprised the 5.01–10 g and 10.01–20 g classes. Group III had the 2–5 g class. Two significantly dissimilar groups were observed for harvest index (HI) at 3 months after transplanting (MAT): group I consisted of the 20.01–30 g, 30.01–40 g, and 40.01–50 g classes while the 2–5 g, 5.01–10 g, and 10.01–20 g, were in group II. The group I remained unchanged as regards total fresh tuber yield. Differences existed, however, within Group II: the 10.01–20g class produced significantly greater tuber yields than the 2–5 g class. However, yields of the 5.01–10 g class, was not significantly different from that of the 10.01–20 g or the 2–5 g class. Considering the sprouting in the presprout nursery and the fact that the plants under the 2–5 g treatment senesced early at 4 MAT, after succumbing to a leaf necrotic disease, the 5.01–10 g class representing the upper range of the microsetts is best for seed yam production.
    https://doi.org/10.17660/ActaHortic.1994.380.52
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/5580
    Digital Object Identifier (DOI)
    https://doi.org/10.17660/ActaHortic.1994.380.52
    IITA Subjects
    Post-Harvesting Technology; Plant Production; Yam; Food Security
    Agrovoc Terms
    Harvesting; Yields; Yams
    Regions
    Africa; Acp; West Africa; North America
    Countries
    Ghana; Nigeria; United States
    Collections
    • Conference Documents594
    copyright © 2019  IITASpace. All rights reserved.
    IITA | Open Access Repository