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    Genotypic variations in physiological deterioration of cassava (Manihot esculenta Crantz) storage roots under inland valley conditions

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    S03ArtEkanayakeGenotypicInthomNodev.pdf (79.89Kb)
    Date
    2003
    Author
    Ekanayake, I.J.
    Lyasse, O.
    Type
    Journal Article
    Journal Article
    Metadata
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    Abstract/Description
    Cassava (Manihot esculenta Crantz) is an important starchy food crop in the inland valley ecosystem areas in West Africa where harvesting and marketing infrastructure is not optimal and postharvest losses are high. An attempt was therefore made to assess the genotypic variability of physiological deterioration (PD) of storage roots obtained from plants grown under inland valley field conditions. Cassava storage roots showed rapid PD within 48 hours after harvesting due to wounding related discoloration. After 6-months field growth under hydro-morphic conditions during the dry season, roots were harvested and the root PD scores obtained visually at 24 and 48 h after was compared among 60 genotypes. The differences in root PD reaction between these genotypes were highly significant (P<0.001) at 24 h after harvest. Genotypic differences in root PD (at 24 h after) were expressed more in the distal than the proximal region of roots. At 48 h after harvest, however the genotypic differences became apparent only at proximal ends of roots. Location of the field with respect to water regime significantly (P<0.001) affected the root PD response 24 h after harvest. Rapid PD test was appropriate to differentiate the genotypic differences 24 and 48 h after root harvest. This study provides an early visual scoring method on cassava root quality and thereby aids to detect a key part of postharvest deterioration losses incurred.
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/4171
    IITA Subjects
    Cassava
    Agrovoc Terms
    Cassava; Manihot Esculenta; Water Stress
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835
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