Root rot resistance in new cassava varieties introduced to farmers in Nigeria

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cg.authorship.typesCGIAR and developing country instituteen
cg.contributor.affiliationInternational Institute of Tropical Agricultureen
cg.contributor.affiliationUniversity of Ibadanen
cg.coverage.countryNigeria
cg.coverage.iso3166-alpha2NG
cg.coverage.regionAfrica
cg.coverage.regionWestern Africa
cg.identifier.doihttps://doi.org/10.1017/s0014479708006777en
cg.issn0014-4797en
cg.issue1en
cg.journalExperimental Agricultureen
cg.reviewStatusPeer Reviewen
cg.subject.iitaGENETIC IMPROVEMENTen
cg.subject.iitaPLANT BREEDINGen
cg.subject.iitaCASSAVAen
cg.subject.iitaPLANT PRODUCTIONen
cg.subject.iitaPOST-HARVESTING TECHNOLOGYen
cg.subject.iitaPLANT GENETIC RESOURCESen
cg.subject.iitaFARMING SYSTEMSen
cg.subject.iitaFOOD SECURITYen
cg.subject.iitaPLANT DISEASESen
cg.subject.iitaDISEASE CONTROLen
cg.subject.iitaPESTS OF PLANTSen
cg.subject.iitaHANDLING, TRANSPORT, STORAGE AND PROTECTION OF AGRICULTURAL PRODUCTSen
cg.subject.iitaFARM MANAGEMENTen
cg.volume45en
dc.contributor.authorOkechukwu, R.U.en
dc.contributor.authorDixon, Alfred G.O.en
dc.contributor.authorAkoroda, M.O.en
dc.contributor.authorMwangi, M.en
dc.contributor.authorBandyopadhyay, Ranajiten
dc.date.accessioned2018-02-06T12:15:18Zen
dc.date.available2018-02-06T12:15:18Zen
dc.identifier.urihttps://hdl.handle.net/10568/90898
dc.titleRoot rot resistance in new cassava varieties introduced to farmers in Nigeriaen
dcterms.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.en
dcterms.accessRightsLimited Access
dcterms.available2009-01-01
dcterms.bibliographicCitationOkechukwu, 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.en
dcterms.extentp. 15-24en
dcterms.issued2009-01
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherCambridge University Pressen
dcterms.subjectagroecological zonesen
dcterms.subjectcassava varietiesen
dcterms.subjectafrican cassava mosaic virusen
dcterms.subjectpathogenen
dcterms.subjectsusceptibleen
dcterms.subjectgenotypesen
dcterms.subjectroot rot diseaseen
dcterms.typeJournal Article

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