Grain-yield stability among tropical maize hybrids derived from doubled-haploid inbred lines under random drought stress and optimum moisture conditions

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dc.contributor.authorSserumaga, Julius Pyton
dc.contributor.authorBeyene, Yoseph
dc.contributor.authorPillay, Kiru
dc.contributor.authorKullaya, Alois
dc.contributor.authorOikeh, Sylvester O.
dc.contributor.authorMugo, Stephen
dc.contributor.authorMachida, Lewis
dc.contributor.authorNgolinda, Ismail
dc.contributor.authorAsea, Godfrey
dc.contributor.authorRingo, Justin
dc.contributor.authorOtim, Michael
dc.contributor.authorAbalo, Grace
dc.contributor.authorKiula, Barnabas
dc.date.accessioned2022-02-18T14:27:09Z
dc.date.available2022-02-18T14:27:09Z
dc.date.issued2018
dc.description.abstractDrought is a devastating environmental stress in agriculture and hence a common target of plant breeding. A review of breeding progress on drought tolerance shows that, to a certain extent, selection for high yield in stress-free conditions indirectly improves yield in water-limiting conditions. The objectives of this study were to (i) assess the genotype environment (GE) interaction for grain yield (GY) and other agronomic traits for maize (Zea mays L.) across East African agro-ecologies; and (ii) evaluate agronomic performance and stability in Uganda and Tanzania under optimum and random drought conditions. Data were recorded for major agronomic traits. Genotype main effect plusGE(GGE) biplot analysis was used to assess the stability of varieties within various environments and across environments. Combined analysis of variance across optimum moisture and random drought environments indicated that locations, mean-squares for genotypes and GE were significant for most measured traits. The best hybrids, CKDHH1097 and CKDHH1090, gave GY advantages of 23%and 43%, respectively, over the commercial hybrid varieties under both optimum-moisture and random drought conditions. Across environments, geno typic variance was less than the GE variance for GY. The hybrids derived from doubled-haploid inbred lines produced higher GY and possessed acceptable agronomic traits compared with the commercial hybrids. Hybrid CKDHH1098 ranked second-best under optimum-moisture and drought-stress environments and was the most stable with broad adaptation to both environments. Use of the best doubled-haploids lines in test cross hybrids make-up, well targeted to the production environments, could boost maize production among farmers in East Africa.en_US
dc.identifier.citationSserumaga, J. P., Beyene, Y., Pillay, K., Kullaya, A., Oikeh, S. O., Mugo, S., ... & Kiula, B. (2018). Grain-yield stability among tropical maize hybrids derived from doubled-haploid inbred lines under random drought stress and optimum moisture conditions. Crop and Pasture Science, 69(7), 691-702. https://doi.org/10.1071/CP17348en_US
dc.identifier.urihttps://doi.org/10.1071/CP17348
dc.identifier.urihttps://nru.uncst.go.ug/xmlui/handle/123456789/2204
dc.language.isoenen_US
dc.publisherCrop and Pasture Scienceen_US
dc.subjectCorrelationen_US
dc.subjectEast Africaen_US
dc.subjectG-E interactionen_US
dc.subjectHeritabilityen_US
dc.subjectManagementen_US
dc.titleGrain-yield stability among tropical maize hybrids derived from doubled-haploid inbred lines under random drought stress and optimum moisture conditionsen_US
dc.typeArticleen_US
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