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Genome-wide association study of resistance to cassava green mite pest and related traits in cassava

dc.contributor.authorEzenwaka, L.
dc.contributor.authorCarpio, D.P. del
dc.contributor.authorJannink, Jean-Luc
dc.contributor.authorRabbi, I.Y.
dc.contributor.authorDanquah, E.Y.
dc.contributor.authorAsante, I.
dc.contributor.authorDanquah, A.
dc.contributor.authorBlay, E.
dc.contributor.authorEgesi, Chiedozie N.
dc.date.accessioned2019-12-04T11:24:28Z
dc.date.available2019-12-04T11:24:28Z
dc.date.issued2018-08
dc.identifier.citationEzenwaka, L., Del Carpio D.P., Jannink, J.L., Rabbi, I.Y., Danquah, E., Asante, I., ... & Egesi, C. (2018). Genome-wide association study of resistance to cassava green mite pest and related traits in cassava. Crop Science, 58(5), 1907-1918.
dc.identifier.issn0011-183X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/4378
dc.descriptionPublished: 26 July 2018
dc.description.abstractCassava green mite [CGM, Mononychellus tanajoa (Bondar)] is a dry-season pest that usually feeds on the underside of young leaves causing leaf chlorosis, stunted growth, and root yield reduction by 80%. Since cassava (Manihot esculenta Crantz) leaves and roots serve as a primary staple food source, a decline in cassava yield can lead to household food, nutrition, and income insecurity. To evaluate the existence of CGM resistance alleles in the available germplasm, a diversity panel of 845 advanced breeding lines obtained from IITA, CIAT, and the National Root Crops Research Institute (NRCRI) were evaluated for CGM severity (CGMS), leaf pubescence (LP), leaf retention (LR), stay green, shoot tip compactness, and shoot tip size. A genome-wide association mapping detected 35 single-nucleotide polymorphisms (SNPs) markers significantly associated with CGMS, LP, and LR on chromosome 8. Colocalization of the most significant SNP associated with CGMS, LP, and LR on chromosome 8 is possibly an indication of pleiotropy or the presence of closely linked genes that regulate these traits. Seventeen candidate genes were found to be associated to CGM resistance. These candidate genes were subdivided into seven categories according to their protein structure namely, Zn finger, pentatricopeptide, MYB, MADS, homeodomain, trichome birefringence-related protein, and ethylene-responsive transcription factor genes. This study revealed significant loci associated with CGM, not previously reported, which together represent potential sources for the ongoing effort to develop multiple pest- and disease-resistant cassava cultivars.
dc.description.sponsorshipBill & Melinda Gates Foundation
dc.format.extent1907-1918
dc.language.isoen
dc.subjectCassava
dc.subjectMononychellus Tanajoa
dc.subjectFertilizers
dc.subjectPlanting
dc.titleGenome-wide association study of resistance to cassava green mite pest and related traits in cassava
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpRoots, Tubers and Bananas
cg.contributor.affiliationNational Root Crops Research Institute, Nigeria
cg.contributor.affiliationCornell University
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Ghana
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryNigeria
cg.creator.identifierIsmail Rabbi: 0000-0001-9966-2941
cg.creator.identifierChiedozie Egesi: 0000-0002-9063-2727
cg.researchthemeBIOTECH & PLANT BREEDING
cg.isijournalISI Journal
cg.authorship.typesCGIAR and developing country institute
cg.iitasubjectPlant Breeding
cg.journalCrop Science
cg.howpublishedFormally Published
cg.accessibilitystatusOpen Access
local.dspaceid100553
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.2135/cropsci2018.01.0024


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