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

dc.contributor.authorNzuki, Inosters
dc.contributor.authorKatari, Manpreet S.
dc.contributor.authorBredeson, Jessen V.
dc.contributor.authorMasumba, Esther
dc.contributor.authorKapinga, Fortunus
dc.contributor.authorSalum, Kasele
dc.contributor.authorMkamilo, Geoffrey S.
dc.contributor.authorShah, Trushar
dc.contributor.authorLyons, Jessica B.
dc.contributor.authorRokhsar, Daniel S.
dc.contributor.authorRounsley, Steve
dc.contributor.authorMyburg, Alexander Andrew
dc.contributor.authorFerguson, Morag E.
dc.date.accessioned2017-08-25T09:12:06Z
dc.date.available2017-08-25T09:12:06Z
dc.date.issued2017-07-21
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.en_ZA
dc.description.departmentForestry and Agricultural Biotechnology Institute (FABI)en_ZA
dc.description.departmentGeneticsen_ZA
dc.description.librarianam2017en_ZA
dc.description.sponsorshipThe Bill and Melinda Gates Foundation under Contract ID. OPPGD1016.en_ZA
dc.description.urihttp://www.frontiersin.org/en_ZA
dc.identifier.citationNzuki I, Katari MS, Bredeson JV, Masumba E, Kapinga F, Salum K, Mkamilo GS, Shah T, Lyons JB, Rokhsar DS, Rounsley S, Myburg AA and Ferguson ME (2017) QTL Mapping for Pest and Disease Resistance in Cassava and Coincidence of Some QTL with Introgression Regions Derived from Manihot glaziovii. Front. Plant Sci. 8:1168. DOI: 10.3389/fpls.2017.01168.en_ZA
dc.identifier.issn1664-462X (online)
dc.identifier.other10.3389/fpls.2017.01168
dc.identifier.urihttp://hdl.handle.net/2263/61804
dc.language.isoenen_ZA
dc.publisherFrontiers Research Foundationen_ZA
dc.rights© 2017 Nzuki, Katari, Bredeson, Masumba, Kapinga, Salum, Mkamilo, Shah, Lyons, Rokhsar, Rounsley,Myburg and Ferguson. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY).en_ZA
dc.subjectIntrogressionen_ZA
dc.subjectGenetic linkage mapen_ZA
dc.subjectKirobaen_ZA
dc.subjectQuantitative trait loci (QTL)en_ZA
dc.subjectCassava brown streak disease (CBSD)en_ZA
dc.subjectCassava mosaic disease (CMD)en_ZA
dc.titleQTL mapping for pest and disease resistance in cassava and coincidence of some QTL with introgression regions derived from Manihot glazioviien_ZA
dc.typeArticleen_ZA

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