Characterization of blast resistance in a diverse rice panel from sub-Saharan Africa

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cg.contributor.affiliationAfrica Rice Centeren
cg.contributor.affiliationInstitut de l'Environnement et Recherches Agricolesen
cg.contributor.affiliationInternational Livestock Research Instituteen
cg.contributor.affiliationInternational Rice Research Instituteen
cg.contributor.affiliationKenya Agricultural and Livestock Research Organizationen
cg.contributor.affiliationUniversity of Arkansasen
cg.contributor.affiliationUniversity of East Angliaen
cg.contributor.affiliationUniversity of Embuen
cg.contributor.donorCGIAR Trust Funden
cg.contributor.initiativeAccelerated Breedingen
cg.creator.identifierCathrine Ziyomo: 0000-0002-6478-3273en
cg.identifier.doihttps://doi.org/10.1094/phyto-10-22-0379-ren
cg.isijournalISI Journalen
cg.issn0031-949Xen
cg.issn1943-7684en
cg.issue7en
cg.journalPhytopathologyen
cg.reviewStatusPeer Reviewen
cg.subject.actionAreaGenetic Innovationen
cg.subject.ilriRICEen
cg.subject.impactAreaNutrition, health and food securityen
cg.volume113en
dc.contributor.authorMutiga, Samuel Kilonzoen
dc.contributor.authorOrwa, Philemonen
dc.contributor.authorNg'ang'a, Everlyne M.en
dc.contributor.authorKyallo, Martina M.en
dc.contributor.authorRotich, Felixen
dc.contributor.authorGichuhi, Emily W.en
dc.contributor.authorKimani, John M.en
dc.contributor.authorMwongera, David T.en
dc.contributor.authorWere, Vincent M.en
dc.contributor.authorYanoria, Mary Jeanieen
dc.contributor.authorMurori, Rosemaryen
dc.contributor.authorMgonja, Emmanuel M.en
dc.contributor.authorZiyomo, Cathrineen
dc.contributor.authorWasilwa, Lusikeen
dc.contributor.authorBachabi, Famataen
dc.contributor.authorNdjiondjop, Marie-Noëlleen
dc.contributor.authorOuedraogo, Ibrahimaen
dc.contributor.authorCorrell, James C.en
dc.contributor.authorTalbot, Nicholas J.en
dc.date.accessioned2023-03-10T14:33:07Zen
dc.date.available2023-03-10T14:33:07Zen
dc.identifier.urihttps://hdl.handle.net/10568/129307
dc.titleCharacterization of blast resistance in a diverse rice panel from sub-Saharan Africaen
dcterms.abstractThere is a recent unparalleled increase in demand for rice in sub-Saharan Africa, yet its production is affected by blast disease. Characterization of blast resistance in adapted African rice cultivars can provide important information to guide growers and rice breeders. We used molecular markers for known blast resistance genes ( Pi genes; n = 21) to group African rice genotypes ( n = 240) into similarity clusters. We then used greenhouse-based assays to challenge representative rice genotypes ( n = 56) with African isolates ( n = 8) of Magnaporthe oryzae which varied in virulence and genetic lineage. The markers grouped rice cultivars into five blast resistance clusters (BRC) which differed in foliar disease severity. Using stepwise regression, we found that the Pi genes associated with reduced blast severity were Pi50 and Pi65, whereas Pik-p, Piz-t, and Pik were associated with increased susceptibility. All rice genotypes in the most resistant cluster, BRC 4, possessed Pi50 and Pi65, the only genes that were significantly associated with reduced foliar blast severity. Cultivar IRAT109, which contains Piz-t, was resistant against seven African M. oryzae isolates, whereas ARICA 17 was susceptible to eight isolates. The popular Basmati 217 and Basmati 370 were among the most susceptible genotypes. These findings indicate that most tested genes were not effective against African blast pathogen collections. Pyramiding genes in the Pi2/9 multifamily blast resistance cluster on chromosome 6 and Pi65 on chromosome 11 could confer broad-spectrum resistance capabilities. To gain further insights into genomic regions associated with blast resistance, gene mapping could be conducted with resident blast pathogen collections.[Formula: see text] Copyright © 2023 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license .en
dcterms.accessRightsOpen Accessen
dcterms.available2023-02-20en
dcterms.bibliographicCitationMutiga, Samuel Kilonzo; Orwa, Philemon; Nganga, Everlyne M.; Kyallo, Martina M.; Rotich, Felix; Gichuhi, Emily W.; Kimani, John M.; Mwongera, David T.; Were, Vincent M.; Yanoria, Mary Jeanie; Murori, Rosemary; Mgonja, Emmanuel M.; Ziyomo, Cathrine; Wasilwa, Lusike; Bachabi, Famata; Ndjiondjop, Marie-Noí«lle; Ouedraogo, Ibrahima; Correll, James C.; Talbot, Nicholas J. 2023. Characterization of blast resistance in a diverse rice panel from sub-Saharan Africa. Phytopathology 113:1278-1288.en
dcterms.extentpp. 1278-1288en
dcterms.issued2023-07en
dcterms.languageenen
dcterms.licenseCC-BY-NC-ND-4.0en
dcterms.publisherScientific Societiesen
dcterms.subjectriceen
dcterms.subjectafricaen
dcterms.subjectsub-saharan africaen
dcterms.typeJournal Articleen

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