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

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cg.contributor.affiliationInternational Maize and Wheat Improvement Centeren
cg.contributor.affiliationUniversity of Nairobien
cg.contributor.affiliationKenya Agricultural and Livestock Research Organizationen
cg.contributor.donorCGIAR Trust Funden
cg.contributor.donorBill & Melinda Gates Foundationen
cg.contributor.donorFoundation for Food & Agriculture Researchen
cg.contributor.donorUnited States Agency for International Developmenten
cg.contributor.initiativeAccelerated Breeding
cg.creator.identifierHilda Musula Kavai: 0009-0001-6600-4528
cg.creator.identifierDan Makumbi: 0000-0002-1801-5986
cg.creator.identifierFelister Nzuve: 0000-0002-2240-6947
cg.creator.identifierWoyengo Vincent Were: 0000-0002-6352-1175
cg.creator.identifierSuresh,L.M.: 0000-0001-6438-6502
cg.creator.identifierWilliam Muiru:0000-0002-3641-2432
cg.creator.identifierManje Gowda: 0000-0003-4434-6364
cg.creator.identifierPrasanna Boddupalli: 0000-0002-5761-2273
cg.howPublishedFormally Publisheden
cg.identifier.doihttps://doi.org/10.3389/fpls.2024.1506139en
cg.isijournalISI Journalen
cg.journalFrontiers in Plant Scienceen
cg.reviewStatusPeer Reviewen
cg.subject.actionAreaGenetic Innovation
cg.subject.impactAreaClimate adaptation and mitigation
cg.subject.impactAreaNutrition, health and food security
dc.contributor.authorKavai, Hilda M.en
dc.contributor.authorMakumbi, Danen
dc.contributor.authorNzuve, Felister M.en
dc.contributor.authorWoyengo, Vincent W.en
dc.contributor.authorSuresh, L. M.en
dc.contributor.authorMuiru, William M.en
dc.contributor.authorGowda, Manjeen
dc.contributor.authorPrasanna, Boddupallien
dc.date.accessioned2025-01-30T16:28:53Zen
dc.date.available2025-01-30T16:28:53Zen
dc.identifier.urihttps://hdl.handle.net/10568/172550
dc.titleInheritance of resistance to maize lethal necrosis in tropical maize inbred linesen
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
dcterms.accessRightsOpen Access
dcterms.available2025-01-08
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
dcterms.hasVersionhttps://hdl.handle.net/10883/35450en
dcterms.issued2025-01-09
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherFrontiers Mediaen
dcterms.subjectcombining abilityen
dcterms.subjectdisease resistanceen
dcterms.subjectgenetic inheritanceen
dcterms.subjectnecrosisen
dcterms.subjectmaizeen
dcterms.subjectinbred linesen
dcterms.subjectgrain yielden
dcterms.typeJournal Article

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