Identification of genes that have undergone adaptive evolution in cassava (Manihot esculenta) and that may confer resistance to cassava brown streak disease

cg.contactwmessier@evolgen.comen_US
cg.contributor.centerInternational Center for Tropical Agriculture - CIAT (Alliance)en_US
cg.contributor.centerInternational Institute of Tropical Agriculture - IITAen_US
cg.contributor.centerEvolutionary Genomics Inc.en_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.countryCFen_US
cg.coverage.regionMiddle Africaen_US
cg.creator.idFerguson, Morag: 0000-0002-7763-5173en_US
cg.creator.idBecerra, Augusto: 0000-0003-3520-2270en_US
cg.identifier.doihttps://doi.org/10.5897/ajb2014.14113en_US
cg.issn1684-5315en_US
cg.issue2en_US
cg.journalAfrican journal of biotechnologyen_US
cg.subject.agrovoccassavaen_US
cg.subject.agrovoccassavaen_US
cg.volume14en_US
dc.contributorKoga, T.M.en_US
dc.contributorJohnson, D.A.en_US
dc.contributorKoga, K.A.en_US
dc.contributorHirsch, G.N.en_US
dc.contributorBecerra, Augustoen_US
dc.contributorMessier, W.en_US
dc.creatorFerguson, Moragen_US
dc.date.accessioned2025-08-06T20:39:09Z
dc.date.available2025-08-06T20:39:09Z
dc.description.abstractCassava (Manihot esculenta) is a vital food security crop and staple in Africa, yet cassava brown streak disease (CBSD) and cassava mosaic disease result in substantial yield losses. The aim of this study was to identify genes that have undergone positive selection during adaptive evolution, from CBSD resistant, tolerant and susceptible M. esculenta varieties and inter-specific hybrids, as well as a wild cassava species. Transcriptomes of 13 genotypes were sequenced and three genes with strong positive selection were detected (designated as EG2771, EG964 and EG5651). Sequence variation for candidate genes in 18 different cassava genotypes was examined in relation to known response to CBSD and whitefly infection. Although, we cannot ascribe a selection pressure that was responsible for the observed positive selection with complete certainty at this stage, given the congruence of the pattern of particular alleles of our positively selected genes and the pattern of disease resistance of the cassava varieties we examined, it is likely that some protein variants coded by alleles of EG2771 and EG964 may be associated with CBSD and whitefly resistance responses. This warrants further investigation. Other alleles of our positively selected genes were likely influenced by domestication or some other unknown selective pressure.en_US
dc.formatPDFen_US
dc.identifierhttps://mel.cgiar.org/reporting/downloadmelspace/hash/4dead471b6b7ba0781037b503c9eff8ben_US
dc.identifier.citationMorag Ferguson, T. M. Koga, D. A. Johnson, K. A. Koga, G. N. Hirsch, Augusto Becerra, W. Messier. (14/1/2015). Identification of genes that have undergone adaptive evolution in cassava (Manihot esculenta) and that may confer resistance to cassava brown streak disease. African journal of biotechnology, 14 (2), pp. 96-109.en_US
dc.identifier.statusOpen accessen_US
dc.identifier.urihttps://hdl.handle.net/20.500.11766/70050
dc.languageenen_US
dc.publisherAcademic Journalsen_US
dc.rightsCC-BY-4.0en_US
dc.sourceAfrican journal of biotechnology;14,Pagination 96-109en_US
dc.subjectresistanten_US
dc.subjectsusceptibleen_US
dc.subjectcassava brown streak disease (cbsd)en_US
dc.subjecttoleranten_US
dc.titleIdentification of genes that have undergone adaptive evolution in cassava (Manihot esculenta) and that may confer resistance to cassava brown streak diseaseen_US
dc.typeJournal Articleen_US
dcterms.available2015-01-14en_US
dcterms.extent96-109en_US
dcterms.issued2015-01-14en_US

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