Show simple item record

dc.contributor.authorOnyeka, T.
dc.contributor.authorEkpo, E.
dc.contributor.authorDixon, A.
dc.date.accessioned2019-12-04T11:18:40Z
dc.date.available2019-12-04T11:18:40Z
dc.date.issued2005
dc.identifier.citationOnyeka, T., Ekpo, E. & Dixon, A. (2005). Virulence and host–pathogen interaction of Botryodiplodia theobromae isolates of Cassava root rot disease. Journal of Phytopathology, 153(11‐12), 726-729.
dc.identifier.issn0931-1785
dc.identifier.urihttps://hdl.handle.net/20.500.12478/3284
dc.description.abstractPathogenic variation of Botryodiplodia theobromae, the cause of cassava root rot disease in Nigeria, was evaluated with 84 isolates from three different ecological zones and four genetically diverse cassava genotypes using root slice inoculation assay. Significant variation was observed for the aggressiveness of isolates, resistance of cassava genotypes and isolate–genotype interactions for percentage diseased area. The isolate effect accounted for 32.13% of total variation, 38.60% was due to genotype effect and 29.16% due to isolate–genotype interactions. The virulence distribution of the pathogen isolates on each of the cassava genotypes showed that 11.36% of the isolates were highly virulent on 30572, 27.27% on 91/02324, 67.05% on TME-1 and 90.91% on 92/0057. Biplot and joint regression analysis confirmed that the isolates varied significantly in their aggressiveness, and there was a quantitative differential interaction between B. theobromae isolates and cassava genotypes for percentage diseased area of inoculated root slice. However, there was relative consistency in the virulence classification of the isolates on resistant and susceptible controls.
dc.language.isoen
dc.subjectBotryodiplodia Theobromae
dc.subjectCassava
dc.subjectRoot Rot Disease
dc.subjectVirulence Variation
dc.titleVirulence and hostpathogen interaction of Botryodiplodia theobromae isolates of cassava root rot disease
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Ibadan
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectCassava
cg.iitasubjectPlant Diseases
cg.iitasubjectGenetic Improvement
cg.accessibilitystatusLimited Access
local.dspaceid94958
cg.identifier.doihttp://dx.doi.org/10.1111/j.1439-0434.2005.01030.x


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record