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Identifying new resistance to Cassava Mosaic Disease and validating markers for the CMD2 locus

dc.contributor.authorThuy, C.T.L.
dc.contributor.authorLopez-Lavalle, L.A.
dc.contributor.authorVu, N.A.
dc.contributor.authorHy, N.H.
dc.contributor.authorNhan, P.T.
dc.contributor.authorCeballos, H.
dc.contributor.authorNewby, J.
dc.contributor.authorTung, N.B.
dc.contributor.authorHein, N.T.
dc.contributor.authorTuan, L.N.
dc.contributor.authorHung, N.
dc.contributor.authorHanh, N.T.
dc.contributor.authorTrang, D.T.
dc.contributor.authorHa, P.T.T.
dc.contributor.authorHam, L.H.
dc.contributor.authorPham, X.H.
dc.contributor.authorQuynh, D.T.N.
dc.contributor.authorRabbi, I.Y.
dc.contributor.authorKulakow, P.
dc.contributor.authorZhang, X.
dc.date.accessioned2022-03-15T08:29:01Z
dc.date.available2022-03-15T08:29:01Z
dc.date.issued2021
dc.identifier.citationThuy, C.T.L., Lopez-Lavalle, L.A., Vu, N.A., Hy, N.H., Nhan, P.T., Ceballos, H., ... & Zhang, X. (2021). Identifying New Resistance to Cassava Mosaic Disease and Validating Markers for the CMD2 locus. Agriculture, 11(9), 1-15.
dc.identifier.issn2077-0472
dc.identifier.urihttps://hdl.handle.net/20.500.12478/7387
dc.description.abstractCassava (Manihot esculenta Crantz) is a crucial staple crop, and provides carbohydrate energy to more than half a billion people in the tropics. Cassava mosaic disease (CMD) is the most important disease of cassava in Africa. Since Sri Lanka Cassava Mosaic Virus (SLCMV) was first reported in South East Asia in 2015, establishing sustainable solutions to CMD has become a top priority for the cassava program at the International Center for Tropical Agriculture (CIAT) and its partners. In the present study, we screened two populations for CMD resistance: VNM142, 142 clones collected from farms throughout Vietnam, and CIAT102, 102 clones resistant to CMD or mites, which were introduced from CIAT. High broad-sense heritability was observed in all the trials (>0.80). From the population VNM142, eight clones showed high CMD resistance with CMD severity scores less than 2.0. Two resistant clones had the same DNA fingerprinting with the accessions CR63 (PER262 or TAI9) and KM57 (VNM8) in the genebank, respectively. To our knowledge, this is the first report of CMD resistance in the genebank at CIAT. We also used the two populations to validate the CMD markers S12_7926132 and S14_4626854. Both markers explained 51% of the population variance in the segregating population CIAT102, but only 11% in the diverse population VNM142. Thus, we concluded that the two CMD markers could not be used to select for CMD resistance in diverse populations, but could predict the CMD resistance in segregating populations when the susceptible parents do not have resistant marker alleles and the resistance of the CMD2 donors is confirmed.
dc.description.sponsorshipCGIAR Research Program on Roots, Tubers and Bananas
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.description.sponsorshipAustralian Centre for International Agricultural Research
dc.format.extent1-15
dc.language.isoen
dc.subjectCassava
dc.subjectDiseases
dc.subjectPlant Diseases
dc.subjectMarker-Assisted Selection
dc.titleIdentifying new resistance to Cassava Mosaic Disease and validating markers for the CMD2 locus
dc.typeJournal Article
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationInternational Center for Tropical Agricultural
cg.contributor.affiliationAgricultural Genetics Institute, Vietnam
cg.contributor.affiliationHung Loc Agricultural Research Center
cg.contributor.affiliationRoot Crops Research and Development Center, Vietnam
cg.contributor.affiliationUniversity of Engineering and Technology, Vietnam
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAsia
cg.coverage.regionSoutheast Asia
cg.coverage.countryVietnam
cg.coverage.hubHeadquarters and Western Africa Hub
cg.researchthemeBiotech and Plant Breeding
cg.identifier.bibtexciteidTHUY:2021
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectAgronomy
cg.iitasubjectCassava
cg.iitasubjectFood Security
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Diseases
cg.iitasubjectPlant Health
cg.iitasubjectPlant Production
cg.journalAgriculture
cg.notesOpen Access Journal; Published online: 30 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/10.3390/agriculture11090829
cg.iitaauthor.identifierIsmail Rabbi: 0000-0001-9966-2941
cg.iitaauthor.identifierPeter Kulakow: 0000-0002-7574-2645
cg.futureupdate.requiredNo
cg.identifier.issue9
cg.identifier.volume11


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