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Collection, genotyping and virus elimination of cassava landraces from Tanzania and documentation of farmer knowledge

dc.contributor.authorFerguson, M.
dc.contributor.authorTumwegamire, S.
dc.contributor.authorChidzanga, C.
dc.contributor.authorShah, T.
dc.contributor.authorMtunda, K.
dc.contributor.authorKulembeka, H.
dc.contributor.authorKimata, B.
dc.contributor.authorTollano, S.
dc.contributor.authorStephen, M.
dc.contributor.authorMpayo, E.
dc.contributor.authorMohamedi, S.
dc.contributor.authorKasele, S.
dc.contributor.authorPalangyo, E.
dc.contributor.authorArmachius, J.
dc.contributor.authorAli, A.H.
dc.contributor.authorSichalwe, K.
dc.contributor.authorMatondo, D.
dc.contributor.authorMasisila, F.F.
dc.contributor.authorMatumbo, Z.
dc.contributor.authorKidunda, B.
dc.contributor.authorArati, A.C.
dc.contributor.authorMuiruri, R.
dc.contributor.authorMunguti, F.
dc.contributor.authorAbass, A.
dc.contributor.authorAbberton, M.
dc.contributor.authorMkamilo, G.
dc.date.accessioned2021-09-27T12:32:22Z
dc.date.available2021-09-27T12:32:22Z
dc.date.issued2021
dc.identifier.citationFerguson, M., Tumwegamire, S., Chidzanga, C., Shah, T., Mtunda, K., Kulembeka, H., ... & Mkamilo, G. (2021). Collection, genotyping and virus elimination of cassava landraces from Tanzania and documentation of farmer knowledge. PloS One, 16(8), e0255326: 1-21.
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7258
dc.description.abstractCassava (Manihot esculenta Crantz.) has been a vital staple and food security crop in Tanzania for several centuries, and it is likely that its resilience will play a key role in mitigating livelihood insecurities arising from climate change. The sector is dominated by smallholder farmers growing traditional landrace varieties. A recent surge in virus diseases and awareness in the commercial potential of cassava has prompted a drive to disseminate improved varieties in the country. These factors however also threaten the existence of landraces and associated farmer knowledge. It is important that the landraces are conserved and utilized as the adaptive gene complexes they harbor can drive breeding for improved varieties that meet agro-ecological adaptation as well as farmer and consumer needs, thereby improving adoption rates. Here we report on cassava germplasm collection missions and documentation of farmer knowledge in seven zones of Tanzania. A total of 277 unique landraces are identified through high-density genotyping. The large number of landraces is attributable to a mixed clonal/sexual reproductive system in which the soil seed bank and incorporation of seedlings plays an important role. A striking divergence in genetic relationships between the coastal regions and western regions is evident and explained by (i) independent introductions of cassava into the country, (ii) adaptation to prevailing agro-ecological conditions and (iii) farmer selections according to the intended use or market demands. The main uses of cassava with different product profiles are evident, including fresh consumption, flour production, dual purpose incorporating both these uses and longer-term food security. Each of these products have different trait requirements. Individual landraces were not widely distributed across the country with limited farmer-to-farmer diffusion with implications for seed systems.
dc.description.sponsorshipGlobal Crop Diversity Trust
dc.description.sponsorshipCGIAR Donors
dc.format.extent1-21
dc.language.isoen
dc.subjectCassava
dc.subjectFood Security
dc.subjectClimate Change
dc.subjectGenotypes
dc.subjectLivelihoods
dc.subjectDisease Control
dc.subjectGenetic Diversity
dc.titleCollection, genotyping and virus elimination of cassava landraces from Tanzania and documentation of farmer knowledge
dc.typeJournal Article
cg.contributor.crpAgriculture for Nutrition and Health
cg.contributor.crpGenebanks
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationThe University of Adelaide
cg.contributor.affiliationTanzania Agricultural Research Institute
cg.contributor.affiliationKenya Plant Health Inspectorate Services
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryTanzania
cg.coverage.hubEastern Africa Hub
cg.coverage.hubCentral Africa Hub
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeBiometrics
cg.researchthemeBiotech and Plant Breeding
cg.identifier.bibtexciteidFERGUSON:2021
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectCassava
cg.iitasubjectClimate Change
cg.iitasubjectDisease Control
cg.iitasubjectFood Security
cg.iitasubjectLivelihoods
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Diseases
cg.iitasubjectPlant Health
cg.iitasubjectPlant Production
cg.journalPLOS ONE
cg.notesOpen Access Journal; Published online: 17 Aug 2021
cg.accessibilitystatusOpen Access
cg.reviewstatusPeer Review
cg.usagerightslicenseCreative Commons Attribution 4.0 (CC BY 0.0)
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1371/journal.pone.0255326
cg.iitaauthor.identifierMorag Ferguson: 0000-0002-7763-5173
cg.iitaauthor.identifierSilver Tumwegamire: 0000-0003-2820-6337
cg.iitaauthor.identifierAdebayo Abass: 0000-0003-1376-3608
cg.iitaauthor.identifierMichael Abberton: 0000-0003-2555-9591
cg.futureupdate.requiredNo
cg.identifier.issue8: e0255326
cg.identifier.volume16


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