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QTL mapping for pest and disease resistance in cassava and coincidence with some introgression regions derived from M. glaziovii

dc.contributor.authorNzuki, I.
dc.contributor.authorKatari, M.S.
dc.contributor.authorBredeson, J.V.
dc.contributor.authorMasumba, E.
dc.contributor.authorKapinga, F.
dc.contributor.authorSalum, K.
dc.contributor.authorMkamilo, G.S.
dc.contributor.authorShah, Tushaar
dc.contributor.authorLyons, J.B.
dc.contributor.authorRokhsar, D.S.
dc.contributor.authorRounsley, S.
dc.contributor.authorMyburg, A.A.
dc.contributor.authorFerguson, M.E.
dc.date.accessioned2019-12-04T11:09:00Z
dc.date.available2019-12-04T11:09:00Z
dc.date.issued2017-07-21
dc.identifier.citationNzuki, I., Katari, M.S., Bredeson, J.V., Masumba, E., Kapinga, F., Kasele, S., ... & Rounsley, S. (2017). QTL mapping for pest and disease resistance in cassava and coincidence with some introgression regions derived from M. glaziovii. Frontiers in Plant Science, 8, 1168.
dc.identifier.issn1664-462X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/1956
dc.descriptionOpen Access Journal; Published online: 21 July 2017
dc.description.abstractGenetic mapping of quantitative trait loci (QTL) for resistance to cassava brown streak disease (CBSD), cassava mosaic disease (CMD), and cassava green mite (CGM) was performed using an F1 cross developed between the Tanzanian landrace, Kiroba, and a breeding line, AR37-80. The population was evaluated for two consecutive years in two sites in Tanzania. A genetic linkage map was derived from 106 F1 progeny and 1,974 SNP markers and spanned 18 chromosomes covering a distance of 1,698 cM. Fifteen significant QTL were identified; two are associated with CBSD root necrosis only, and were detected on chromosomes V and XII, while seven were associated with CBSD foliar symptoms only and were detected on chromosomes IV, VI, XVII, and XVIII. QTL on chromosomes 11 and 15 were associated with both CBSD foliar and root necrosis symptoms. Two QTL were found to be associated with CMD and were detected on chromosomes XII and XIV, while two were associated with CGM and were identified on chromosomes V and X. There are large Manihot glaziovii introgression regions in Kiroba on chromosomes I, XVII, and XVIII. The introgression segments on chromosomes XVII and XVIII overlap with QTL associated with CBSD foliar symptoms. The introgression region on chromosome I is of a different haplotype to the characteristic “Amani haplotype” found in the landrace Namikonga and others, and unlike some other genotypes, Kiroba does not have a large introgression block on chromosome IV. Kiroba is closely related to a sampled Tanzanian “tree cassava.” This supports the observation that some of the QTL associated with CBSD resistance in Kiroba are different to those observed in another variety, Namikonga.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1-15
dc.language.isoen
dc.subjectQuantitative Trait Loci
dc.subjectIntrogression
dc.subjectCassava
dc.subjectGenetic Map
dc.subjectKiroba
dc.subjectAfrican Cassava Mosaic Virus
dc.subjectCassava Brown Streak Disease
dc.subjectDisease Resistance
dc.subjectGenomics
dc.subjectDna
dc.titleQTL mapping for pest and disease resistance in cassava and coincidence with some introgression regions derived from M. glaziovii
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationUniversity of Pretoria
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationNew York University
cg.contributor.affiliationUniversity of California
cg.contributor.affiliationSugarcane Research Institute, Tanzania
cg.contributor.affiliationNaliendele Agricultural Research Institute, Tanzania
cg.contributor.affiliationLake Zone Agricultural Research and Development Institute, Tanzania
cg.contributor.affiliationGenus plc, USA
cg.coverage.regionAfrica
cg.coverage.regionEast Africa
cg.coverage.countryTanzania
cg.researchthemeBIOTECH & PLANT BREEDING
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectCassava
cg.iitasubjectDisease Control
cg.iitasubjectPests Of Plants
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Diseases
cg.journalFrontiers in Plant Science
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid85262
cg.targetaudienceScientists
cg.identifier.doihttp://dx.doi.org/10.3389/fpls.2017.01168


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