Inheritance of resistance to maize lethal necrosis in tropical maize inbred lines

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cg.contributor.affiliationInternational Maize and Wheat Improvement Centeren_US
cg.contributor.affiliationUniversity of Nairobien_US
cg.contributor.affiliationKenya Agricultural and Livestock Research Organizationen_US
cg.contributor.donorCGIAR Trust Funden_US
cg.contributor.donorBill & Melinda Gates Foundationen_US
cg.contributor.donorFoundation for Food & Agriculture Researchen_US
cg.contributor.donorUnited States Agency for International Developmenten_US
cg.contributor.initiativeAccelerated Breedingen_US
cg.creator.identifierHilda Musula Kavai: 0009-0001-6600-4528en_US
cg.creator.identifierDan Makumbi: 0000-0002-1801-5986en_US
cg.creator.identifierFelister Nzuve: 0000-0002-2240-6947en_US
cg.creator.identifierWoyengo Vincent Were: 0000-0002-6352-1175en_US
cg.creator.identifierSuresh,L.M.:0000-0001-6438-6502en_US
cg.creator.identifierWilliam Muiru:0000-0002-3641-2432en_US
cg.creator.identifierManje Gowda: 0000-0003-4434-6364en_US
cg.creator.identifierPrasanna Boddupalli: 0000-0002-5761-2273en_US
cg.howPublishedFormally Publisheden_US
cg.identifier.doihttps://doi.org/10.3389/fpls.2024.1506139en_US
cg.identifier.urlhttps://hdl.handle.net/10883/35450en_US
cg.isijournalISI Journalen_US
cg.journalFrontiers in Plant Scienceen_US
cg.reviewStatusPeer Reviewen_US
cg.subject.actionAreaGenetic Innovationen_US
cg.subject.impactAreaClimate adaptation and mitigationen_US
cg.subject.impactAreaNutrition, health and food securityen_US
dc.contributor.authorKavai, Hilda M.en_US
dc.contributor.authorMakumbi, Danen_US
dc.contributor.authorNzuve, Felister M.en_US
dc.contributor.authorWoyengo, Vincent W.en_US
dc.contributor.authorSuresh, L. M.en_US
dc.contributor.authorMuiru, William M.en_US
dc.contributor.authorGowda, Manjeen_US
dc.contributor.authorPrasanna, Boddupallien_US
dc.date.accessioned2025-01-30T16:28:53Zen_US
dc.date.available2025-01-30T16:28:53Zen_US
dc.identifier.urihttps://hdl.handle.net/10568/172550en_US
dc.titleInheritance of resistance to maize lethal necrosis in tropical maize inbred linesen_US
dcterms.abstractMaize (Zea mays L.) production in sub-Saharan Africa can be improved by using hybrids with genetic resistance to maize lethal necrosis (MLN). This study aimed to assess the general (GCA) and specific combining ability (SCA), reciprocal effects, and quantitative genetic basis of MLN resistance and agronomic traits in tropical maize inbred lines. A total of 182 hybrids from a 14-parent diallel, along with their parents, were evaluated under artificial MLN inoculation and rainfed conditions for 3 years in Kenya. Disease ratings at four time points, grain yield (GY), and other agronomic traits were analyzed using Griffing’s Method 3 and Hayman’s diallel models. Significant (P < 0.001) GCA and SCA mean squares were observed for all traits under disease conditions and most traits under rainfed conditions, highlighting the importance of both additive and non-additive genetic effects. However, additive gene action predominated for all traits. Narrow-sense heritability estimates for MLN resistance (h2 = 0.52–0.56) indicated a strong additive genetic component. Reciprocal effects were not significant for MLN resistance, suggesting minimal maternal or cytoplasmic inheritance. Four inbred lines showed significant negative GCA effects for MLN resistance and positive GCA effects for GY under artificial MLN inoculation. Inbred lines CKL181281 and CKL182037 (GCA effects for MLN4 = -0.45 and -0.24, respectively) contained the most recessive alleles for MLN resistance. The minimum number of groups of genes involved in MLN resistance was estimated to be three. Breeding strategies that emphasize GCA could effectively be used to improve MLN resistance in this germplasm.en_US
dcterms.accessRightsOpen Accessen_US
dcterms.available2025-01-08en_US
dcterms.bibliographicCitationKavai, H. M., Makumbi, D., Nzuve, F. M., Woyengo, V. W., Suresh, L. M., Muiru, W. M., Gowda, M., & Prasanna, B. M. (2025). Inheritance of resistance to maize lethal necrosis in tropical maize inbred lines. Frontiers in Plant Science, 15. https://doi.org/10.3389/fpls.2024.1506139en_US
dcterms.issued2025-01-09en_US
dcterms.languageenen_US
dcterms.licenseCC-BYen_US
dcterms.publisherFrontiers Mediaen_US
dcterms.subjectcombining abilityen_US
dcterms.subjectdisease resistanceen_US
dcterms.subjectgenetic inheritanceen_US
dcterms.subjectnecrosisen_US
dcterms.subjectmaizeen_US
dcterms.subjectinbred linesen_US
dcterms.subjectgrain yielden_US
dcterms.typeJournal Articleen_US

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