Characterization of pathotypes among isolates of Xanthomonas axonopodis pv. manihotis in Colombia

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dc.creatorRestrepo, S.
dc.creatorDuque E., Myriam Cristina
dc.creatorVerdier, Valerie M.
dc.date2000-12
dc.date2014-09-24T08:41:52Z
dc.date2014-09-24T08:41:52Z
dc.date.accessioned2026-06-27T14:34:03Z
dc.descriptionCassava bacterial blight, caused by Xanthomonas axonopodis pv. manihotis (Xam) is a destructive disease occurring in most cassava growing-areas. Although Colombian isolates of Xam differ in DNA polymorphism and pathogenicity, no suitable host differentials have been identified to demonstrate physiological specialization. A set of 26 Xam isolates from three edaphoclimatic zones (ECZs) in Colombia was selected for inoculation on a set of 17 potential cassava differentials. Leaf inoculation and stem puncture were used in order to detect possible specific interactions between cultivars and isolates. Cultivar × isolate interaction was highly significant (P < 0·001) after stem inoculation, but not after leaf inoculation. The stem inoculation technique was selected as a method for resistance screening of cassava cultivars for bacterial blight resistance. A highly significant interaction was also detected when cultivar behaviour was rated as area under the disease progress curve (AUDPC) after stem inoculation. Different pathotypes were defined among the 26 isolates and differential cultivars were proposed to define the pathotypic composition of Xam populations in three ECZs in Colombia. The results should help to improve selection of sources of resistance to cassava bacterial blight.
dc.identifierhttps://hdl.handle.net/10568/43260
dc.identifier.urihttp://hdl.handle.net/123456789/81920
dc.languageen
dc.publisherWiley
dc.rightsOpen Access
dc.subjectmanihot esculenta
dc.subjectpathotypes
dc.subjectpathogenicity
dc.subjectxanthomonas
dc.subjectpatotipos
dc.subjectpatogenicidad
dc.subjecthorticulture
dc.subjectgenetics
dc.titleCharacterization of pathotypes among isolates of Xanthomonas axonopodis pv. manihotis in Colombia
dc.typeJournal Article

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