Genetic analyses of tropical maize lines under artificial infestation of fall armyworm and foliar diseases under optimum conditions

dc.creatorKamweru, I.
dc.creatorBeyene, Y.
dc.creatorBruce, A.Y.
dc.creatorMakumbi, D.
dc.creatorAdetimirin, V. O.
dc.creatorPerez-Rodriguez, P.
dc.creatorToledo, F.H.
dc.creatorCrossa, J.
dc.creatorPrasanna, B.M.
dc.creatorGowda, M.
dc.date2023-01-24T01:05:12Z
dc.date2023-01-24T01:05:12Z
dc.date2023
dc.date.accessioned2023-07-17T20:10:15Z
dc.date.available2023-07-17T20:10:15Z
dc.identifierhttps://hdl.handle.net/10883/22455
dc.identifier10.3389/fpls.2023.1086757
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7514200
dc.descriptionDevelopment and deployment of high-yielding maize varieties with native resistance to Fall armyworm (FAW), turcicum leaf blight (TLB), and gray leaf spot (GLS) infestation is critical for addressing the food insecurity in sub-Saharan Africa. The objectives of this study were to determine the inheritance of resistance for FAW, identity hybrids which in addition to FAW resistance, also show resistance to TLB and GLS, and investigate the usefulness of models based on general combining ability (GCA) and SNP markers in predicting the performance of new untested hybrids. Half-diallel mating scheme was used to generate 105 F1 hybrids from 15 parents and another 55 F1 hybrids from 11 parents. These were evaluated in two experiments, each with commercial checks in multiple locations under FAW artificial infestation and optimum management in Kenya. Under artificial FAW infestation, significant mean squares among hybrids and hybrids x environment were observed for most traits in both experiments, including at least one of the three assessments carried out for foliar damage caused by FAW. Interaction of GCA x environment and specific combining ability (SCA) x environment interactions were significant for all traits under FAW infestation and optimal conditions. Moderate to high heritability estimates were observed for GY under both management conditions. Correlation between GY and two of the three scorings (one and three weeks after infestation) for foliar damage caused by FAW were negative (-0.27 and -0.38) and significant. Positive and significant correlation (0.84) was observed between FAW-inflicted ear damage and the percentage of rotten ears. We identified many superior-performing hybrids compared to the best commercial checks for both GY and FAW resistance associated traits. Inbred lines CML312, CML567, CML488, DTPYC9-F46-1-2-1-2, CKDHL164288, CKDHL166062, and CLRCY039 had significant and positive GCA for GY (positive) and FAW resistance-associated traits (negative). CML567 was a parent in four of the top ten hybrids under optimum and FAW conditions. Both additive and non-additive gene action were important in the inheritance of FAW resistance. Both GCA and marker-based models showed high correlation with field performance, but marker-based models exhibited considerably higher correlation. The best performing hybrids identified in this study could be used as potential single cross testers in the development of three-way FAW resistance hybrids. Overall, our results provide insights that help breeders to design effective breeding strategies to develop FAW resistant hybrids that are high yielding under FAW and optimum conditions.
dc.languageEnglish
dc.publisherFrontiers
dc.relationhttps://figshare.com/collections/Genetic_analyses_of_tropical_maize_lines_under_artificial_infestation_of_fall_armyworm_and_foliar_diseases_under_optimum_conditions/6394032
dc.relationClimate adaptation & mitigation
dc.relationNutrition, health & food security
dc.relationAccelerated Breeding
dc.relationPlant Health
dc.relationGenetic Innovation
dc.relationResilient Agrifood Systems
dc.relationBill & Melinda Gates Foundation
dc.relationUnited States Agency for International Development
dc.relationFoundation for Food & Agriculture Research
dc.relationhttps://hdl.handle.net/10568/128092
dc.rightsCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
dc.rightsOpen Access
dc.source14
dc.source1664-462X
dc.sourceFrontiers in Plant Science
dc.source1086757
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectFall Army Worm
dc.subjectGeneral Combining Ability
dc.subjectSpecific Combining Ability
dc.subjectHybrid Prediction
dc.subjectMAIZE
dc.subjectFALL ARMYWORMS
dc.subjectHOST PLANT RESISTANCE
dc.subjectFOOD INSECURITY
dc.subjectCOMBINING ABILITY
dc.subjectMaize
dc.titleGenetic analyses of tropical maize lines under artificial infestation of fall armyworm and foliar diseases under optimum conditions
dc.typeArticle
dc.typePublished Version
dc.coverageAfrica South of Sahara
dc.coverageSwitzerland


Este ítem pertenece a la siguiente institución