Gene complementarity of resistance to the cassava mosaic disease among African cassava accessions

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cg.authorship.typesCGIAR and developing country instituteen
cg.contributor.affiliationInternational Institute of Tropical Agricultureen
cg.contributor.affiliationUniversity of Ghanaen
cg.contributor.donorRockefeller Foundationen
cg.coverage.countryNigeria
cg.coverage.countryGhana
cg.coverage.iso3166-alpha2NG
cg.coverage.iso3166-alpha2GH
cg.coverage.regionAfrica
cg.coverage.regionWestern Africa
cg.issn1021-9730en
cg.issue3en
cg.reviewStatusPeer Reviewen
cg.subject.iitaCASSAVAen
cg.subject.iitaFARM MANAGEMENTen
cg.subject.iitaLIVELIHOODSen
cg.subject.iitaPLANT GENETIC RESOURCESen
cg.subject.iitaPLANT BREEDINGen
cg.subject.iitaPESTS OF PLANTSen
cg.subject.iitaHANDLING, TRANSPORT, STORAGE AND PROTECTION OF AGRICULTURAL PRODUCTSen
cg.subject.iitaLAND USEen
cg.subject.iitaGENETIC IMPROVEMENTen
cg.subject.iitaPLANT DISEASESen
cg.subject.iitaPLANT PRODUCTIONen
cg.subject.iitaDISEASE CONTROLen
cg.volume14en
dc.contributor.authorLokko, Y.en
dc.contributor.authorDixon, Alfred G.O.en
dc.contributor.authorOffei, Samuel Kwameen
dc.contributor.authorDanquah, E.Y.en
dc.date.accessioned2018-03-07T11:25:46Zen
dc.date.available2018-03-07T11:25:46Zen
dc.identifier.urihttps://hdl.handle.net/10568/91386
dc.titleGene complementarity of resistance to the cassava mosaic disease among African cassava accessionsen
dcterms.abstractThe cassava mosaic virus disease (CMD) is the most important disease o1'cassava in Africa, causing severe economic losses. The genetic stock, clone 58308, has been extensively used in breeding for resistance to the disease, but recently, other sources o1'resistance to the disease have been identified among the landraces and could be used in breeding to diversity resistance to the disease. In this study, the progenies o1'70 segregating F, crosses of some resistance and susceptible landraces, clone 58308 and its derivatives, were evaluated in 3 environments for their reaction to CMD to determine the mode of inheritance and allelic relationships among the various resistant accessions. The result indicated a polygenic mode of inheritance, with both resistant and susceptible accessions contributing effective factors towards CMD resistance in their progenies. Effective factors contributed by the susceptible parents were recessive. Among the resistant accessions, the results further showed that the genes for resistance are nonallelic and not linked. Positive transgressive segregants were also detected in several crosses. Significant differences in the mean distribution of progeny disease severity scores further revealed allegic differences among the various sources of resistance. These results imply that the resistant landraces are potential new sources of resistance, which could be used in a breeding programme, together with the resistant improved clones derived from clone 58308 to diversify resistance, while developing new genotypes with enhanced resistance to CMD.en
dcterms.accessRightsLimited Access
dcterms.bibliographicCitationLokko, Y., Dixon, A.G., Offei, S.K. & Danquah, E.Y. (2006). Gene complementarity of resistance to the cassava mosaic disease among African cassava accessions. African Crop Science Journal, 14(3), 207-220.en
dcterms.extentp. 207-220en
dcterms.issued2006
dcterms.languageen
dcterms.subjectcassava mosaic virus diseaseen
dcterms.subjectcloneen
dcterms.subjectresistanceen
dcterms.subjectlandracesen
dcterms.subjectgenotypesen
dcterms.typeJournal Article

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