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dc.contributor.authorOkechukwu, R.U.
dc.contributor.authorDixon, Alfred G.O.
dc.contributor.authorAkoroda, M.O.
dc.contributor.authorMwangi, M.
dc.contributor.authorBandyopadhyay, Ranajit
dc.date.accessioned2019-12-04T11:15:10Z
dc.date.available2019-12-04T11:15:10Z
dc.date.issued2008
dc.identifier.citationOkechukwu, R.U., Dixon, A.G.O., Akoroda, M.O., Mwangi, M. & Bandyopadhyay, R. (2009). Root rot resistance in new cassava varieties introduced to farmers in Nigeria. Experimental Agriculture, 45(1), 15-24.
dc.identifier.issn0014-4797
dc.identifier.urihttps://hdl.handle.net/20.500.12478/2930
dc.descriptionPublished online: 01 January 2009
dc.description.abstractIn 2004 and 2005 through field trials in over 2500 locations in several agroecological zones, 40 new cassava varieties were introduced in Nigeria. The trials were managed by scientists, extension workers and farmers. The aim in introducing these new varieties was to pre-emptively manage cassava mosaic disease, to avert an imminent threat from the Ugandan strain of the pathogen and prevent damage to the Nigerian cassava economy. From these trials, 10 new varieties were selected and officially released for high root yield, high dry matter content and acceptability for food, industry and livestock. Cassava root rot is a major source of yield loss in Nigeria, especially where farmers practice late harvest because they wait for a good price from the market before harvest and sales. This paper investigated how the 40 varieties together with three old improved varieties currently in farmers' fields during the formal trials responded to root rot disease. No absolutely resistant variety was found, indicating that early harvest (9–11 months after planting) is still the best way to reduce losses from root rot. Root rot is also significantly (p ≤ 0.05) influenced by genotype and environment interaction. Most root rot was recorded in the humid forest and the least was in the Sudan savanna agroecological zone. Using a rank-sum method, the 43 varieties were separated into highly resistant, resistant, moderately resistant, moderately susceptible, susceptible and highly susceptible classes.
dc.language.isoen
dc.subjectAgroecological Zones
dc.subjectCassava Varieties
dc.subjectAfrican Cassava Mosaic Virus
dc.subjectPathogen
dc.subjectSusceptible
dc.subjectGenotypes
dc.subjectRoot Rot Disease
dc.titleRoot rot resistance in new cassava varieties introduced to farmers in Nigeria
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.authorship.typesCGIAR and developing country institute
cg.iitasubjectGenetic Improvement
cg.iitasubjectPlant Breeding
cg.iitasubjectCassava
cg.iitasubjectPlant Production
cg.iitasubjectPost-Harvesting Technology
cg.iitasubjectPlant Genetic Resources
cg.iitasubjectFarming Systems
cg.iitasubjectFood Security
cg.iitasubjectPlant Diseases
cg.iitasubjectDisease Control
cg.iitasubjectPests Of Plants
cg.iitasubjectHandling, Transport, Storage And Protection Of Agricultural Products
cg.iitasubjectFarm Management
cg.accessibilitystatusLimited Access
local.dspaceid94031
cg.identifier.doihttp://dx.doi.org/10.1017/S0014479708006777


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