Witches' broom disease of cassava is associated with a fastidious fungal pathogen in Southeast Asia

cg.authorship.typesCGIAR and advanced research instituteen
cg.contributor.affiliationInternational Center for Tropical Agricultureen
cg.contributor.affiliationPlant Protection Instituteen
cg.contributor.affiliationGeneral Directorate of Agricultureen
cg.contributor.donorUnited States Agency for International Developmenten
cg.contributor.donorAustralian Centre for International Agricultural Researchen
cg.coverage.countryAustralia
cg.coverage.iso3166-alpha2AU
cg.coverage.regionOceania
cg.coverage.regionAustralia and New Zealand
cg.creator.identifierWARREN ARINAITWE: 0000-0002-7210-6555
cg.creator.identifierAL IMRAN MALIK: 0000-0002-8688-2117
cg.creator.identifierJonathan Newby: 0000-0001-8088-5491
cg.creator.identifierAna Maria Leiva Sandoval: 0000-0002-7302-8253
cg.creator.identifierJuan Manuel Pardo: 0000-0003-0496-3181
cg.creator.identifierWilmer J. Cuellar: 0000-0003-4702-3237
cg.subject.actionAreaResilient Agrifood Systems
cg.subject.alliancebiovciatCASSAVAen
cg.subject.alliancebiovciatCLIMATE CHANGEen
cg.subject.impactAreaNutrition, health and food security
dc.contributor.authorArinaitwe, Wen
dc.contributor.authorVongphachanh, Pen
dc.contributor.authorChittarath, Ken
dc.contributor.authorHangLe, Ten
dc.contributor.authorOeurn, Sen
dc.contributor.authorMalik, Ien
dc.contributor.authorNewby, Jen
dc.contributor.authorSophearith, Sen
dc.contributor.authorYouabee, Len
dc.contributor.authorLeiva, Aen
dc.contributor.authorPardo, Jen
dc.contributor.authorCuellar, Wen
dc.date.accessioned2024-02-01T09:44:32Zen
dc.date.available2024-02-01T09:44:32Zen
dc.identifier.urihttps://hdl.handle.net/10568/138757
dc.titleWitches' broom disease of cassava is associated with a fastidious fungal pathogen in Southeast Asiaen
dcterms.abstractCassava Witches' Broom Disease (CWBD) is a threat to cassava (Manihot esculenta) in mainland Southeast Asia (SEA). The prevalence of CWBD in the region, which had been low in the previous 5 years, has reached a critical point. CWBD incidence in Lao PDR, Cambodia, Vietnam, and Thailand has been reported at 75% in some cases. CWBD was previously suspected to be caused by a phytoplasma, with limited-to-no detection. There is no biological evidence linking phytoplasma and CWBD. We recently used shotgun sequencing to examine pathogen communities in CWBD-infected and healthy plants. We found that a fungus in the genus Ceratobasidium, 98.3-99.7%, similar to C. theobromae, was conspicuously present in contigs from diseased but not healthy plants. C. theobromae causes vascular streak disease (VSD), one of the major cacao diseases in SEA and challenging to culture in-vitro. We have developed a robust PCR-based assay based on the latest sequence data to support the multiplication of disease-free planting materials and regional wide surveillance. Currently, we are investigating CWBD diversity, disease progression, host range, and transmission pathways to accelerate the development of integrated management options, including breeding for resistance and biochemical control.en
dcterms.accessRightsOpen Access
dcterms.bibliographicCitationArinaitwe, W.; Vongphachanh, P.; Chittarath, K.; HangLe, T.; Oeurn, S.; Malik, I.; Newby, J.; Sophearith, S.; Youabee, L.; Leiva, A.; Pardo, J.; Cuellar, W. (2023) Witches' broom disease of cassava is associated with a fastidious fungal pathogen in Southeast Asia. 15 sl.en
dcterms.extent15 sl.en
dcterms.issued2023-08-31
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.subjectcassavaen
dcterms.subjectpathogensen
dcterms.subjectfungien
dcterms.subjectdisease outbreaksen
dcterms.typeAbstract
dcterms.typePresentation

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