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Geographical distribution and genetic diversity of the banana fusarium wilt fungus in Laos and Vietnam

dc.contributor.authorChittarath, C.
dc.contributor.authorNguyen, C.H.
dc.contributor.authorBailey, W.C.
dc.contributor.authorZheng, S.J.
dc.contributor.authorMostert, D.
dc.contributor.authorViljoen, A.
dc.contributor.authorTazuba, A.
dc.contributor.authorOcimati, W.
dc.contributor.authorKearsley, E.
dc.contributor.authorChi, T.Y.
dc.contributor.authorTho, N.T.
dc.contributor.authorHung, N.T.
dc.contributor.authorDita, M.
dc.contributor.authorShah, T.
dc.contributor.authorKaranja, M.
dc.contributor.authorMahuku, G.
dc.contributor.authorBlomme, G.
dc.date.accessioned2022-08-08T15:33:42Z
dc.date.available2022-08-08T15:33:42Z
dc.date.issued2022
dc.identifier.citationChittarath, K., Nguyen, C.H., Bailey, W.C., Zheng, S.J., Mostert, D., Viljoen, A., ... & Blomme, G. (2022). Geographical distribution and genetic diversity of the banana fusarium wilt fungus in Laos and Vietnam. Journal of Fungi, 8(1): 46, 1-15.
dc.identifier.issn2309-608X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7613
dc.description.abstractFusarium wilt, caused by the fungus Fusarium oxysporum f. sp. cubense (Foc), poses a major threat to global banana production. The tropical race 4 (TR4) variant of Foc is a highly virulent form with a large host range, and severely affects Cavendish bananas. Foc TR4 was recently observed within the Greater Mekong Subregion, after Chinese private companies expanded Cavendish production to the region. In this study, extensive surveys conducted across Laos and Vietnam show that Foc TR4 is still mainly constricted to the northern regions of these countries and is limited to Cavendish cultivation settings. In Laos, Foc TR4 is associated with large-scale Cavendish plantations owned by or involved with Chinese companies through which infected planting material could have been imported. In Vietnam, mostly small-holder Cavendish farmers and backyard gardens were affected by Foc TR4. In Vietnam, no direct link is found with Chinese growers, and it is expected the pathogen mainly spreads through local and regional movement of infected planting materials. Foc TR4 was not recorded on banana cultivars other than Cavendish. The extensively cultivated ‘Pisang Awak’ cultivar was solely infected by VCGs belonging to Foc race 1 and 2, with a high occurrence of VCG 0123 across Laos, and of VCG 0124/5 in Vietnam. Substantial diversity of Foc VCGs was recorded (VCGs 0123, 0124/5, 01218 and 01221) from northern to southern regions in both countries, suggesting that Fusarium wilt is well established in the region. Interviews with farmers indicated that the local knowledge of Fusarium wilt epidemiology and options for disease management was limited. Clear communication efforts on disease epidemiology and management with emphasis on biosecurity practices need to be improved in order to prevent further spread of Foc TR4 to mixed variety smallholder settings.
dc.description.sponsorshipFood and Agriculture Organization of the United Nations
dc.format.extent1-15
dc.language.isoen
dc.subjectFusarium
dc.subjectBananas
dc.subjectSmallholders
dc.subjectPlant Diseases
dc.subjectGenetic Variation
dc.titleGeographical distribution and genetic diversity of the banana fusarium wilt fungus in Laos and Vietnam
dc.typeJournal Article
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationMinistry of Agriculture and Forestry, Vietnam
cg.contributor.affiliationPlant Protection Research Institute, Vietnam
cg.contributor.affiliationStellenbosch University
cg.contributor.affiliationYunnan Academy of Agricultural Sciences
cg.contributor.affiliationAlliance of Bioversity International and CIAT
cg.contributor.affiliationBlueGreen Labs, Belgium
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAsia
cg.coverage.countryVietnam
cg.coverage.hubEastern Africa Hub
cg.researchthemePlant Production and Health
cg.identifier.bibtexciteidCHITTARATH:2022
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectBanana
cg.iitasubjectDisease Control
cg.iitasubjectFood Security
cg.iitasubjectGenetic Improvement
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Diseases
cg.iitasubjectPlant Genetic Resources
cg.iitasubjectPlant Health
cg.iitasubjectPlant Production
cg.iitasubjectSmallholder Farmers
cg.journalJournal of Fungi
cg.notesOpen Access Journal; Published online: 02 Jan 2022
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.3390/jof8010046
cg.iitaauthor.identifierTrushar Shah: 0000-0002-0091-7981
cg.iitaauthor.identifierGeorge Mahuku: 0000-0001-8444-8651
cg.futureupdate.requiredNo
cg.identifier.issue1:46
cg.identifier.volume8


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