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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/23775


Title: Reaction of sweetpotato clones to virus disease and their yield performance in Uganda
Authors: Byamukama, E.
Adipala, E.
Gibson, R.
Aritua, V.
Keywords: Adaptability, AMMI analysis, Ipomoea batatas   , yield stability
Adaptabilité, analyse d'AMMI, Ipomea batatas   , stabilité de rendement
Issue Date: 31-Dec-2002
Publisher: African Crop Science Society
Citation: African Crop Science Journal (ISSN: 1021-9730) Vol 10 Num 4
Abstract: Sweetpotato virus disease (SPVD) casused by dual infection of sweetpotato chlorotic stunt virus (SPCSV) and sweetpotato featherly mottle virus (SPFMV) is a major constraint to sweetpotato production in Uganda, whose infestation often necesitates instituting control measures. Although among the available control measures use of resistant and high yielding varieties is the cheapest and effective means of controlling the disease, reaction of several sweetpotato clones to the disease is largely unknown. A study was conducted in three geographical regions (Namulonge, Kachwekano, Bulegeni, Mbarara and Serere) in Uganda to evaluate reaction to sweetpotato virus disease (SPVD) and yield of 15 clones. The study was laid out in a completely randomised block design with 4 replications per clone. Mbarara and Namulonge had high incidence of SPVD (area under disease progress curve, AUDPC = 0.77, 0.47, respectively), while Serere had the lowest incidence (AUDPC = 0.13). Clones obtained from the International Potato Center (CIP) were highly susceptible to SPVD, while Ugandan lines were tolerant to SPVD even under high disease pressure. Clones Zapallo, Kemb 37, Mugande and Araka red were the most infected by the disease (AUDPC = 1.17, 1.04, 0.96, 0.77, respectively), while clones 93-523, 93-1927, 93-493 and 93-319 each had a consistently lower AUDPC across all locations (AUDPC = 0.086, 0.112, 0.114, 0.118). Clone 93-52 was high yielding across all locations (17.7 t ha-1) followed by 93-1927, Kemb37, Mugande and Tanzania (AUDPC = 16.9, 16.1, 15.6, 13.9 t ha-1, respectively). The lowest yielding clones were 93-316, 93-663, 93-523 and 23/60. Clones 93-29, 93-1096 and 23/60 were adaptable to all sites.
URI: http://hdl.handle.net/1807/23775
Other Identifiers: http://www.bioline.org.br/abstract?id=cs02030
Rights: Copyright 2002 - African Crop Science Society
Appears in Collections:Bioline International Legacy Collection

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