Performance and yield stability of maize hybrids in stress-prone environments in eastern Africa

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dc.contributor.authorSantos Rezende, Wender
dc.contributor.authorBeyene, Yoseph
dc.contributor.authorMugo, Stephen
dc.contributor.authorNdou, Eric
dc.contributor.authorGowda, Manje
dc.contributor.authorSserumaga, Julius Pyton
dc.contributor.authorAsea, Godfrey
dc.contributor.authorNgolinda, Ismail
dc.contributor.authorJumbo, McDonald
dc.contributor.authorOikeh, Sylvester O.
dc.contributor.authorOlsen, Michael
dc.contributor.authorBoréma, Aluízio
dc.contributor.authorDamião Cruz, Cosme
dc.contributor.authorPrasanna, Boddupalli M.
dc.date.accessioned2023-01-29T10:35:44Z
dc.date.available2023-01-29T10:35:44Z
dc.date.issued2020
dc.description.abstractIdentification and deployment of high-yielding and stress-tolerant maize hybrids adapted to stress-prone agro-ecologies is important for improving the food security and livelihoods of smallholder farmers in eastern Africa. The objectives of this study were to (i) assess the performance of maize hybrids under well-watered and drought stress conditions; (ii) evaluate grain yield stability of 65 intermediate-maturing and 55 early-maturing hybrids in 24 well-watered locations and seven drought stress locations; and (iii) identify representative and/or discriminative testing locations for increasing genetic gains for the target traits. There were significant differences for grain yield among early- and intermediatematuring hybrids tested under well-watered and drought stress environments. Among the early-maturing hybrids, the top 10 hybrids produced 46.8%–73.9% and 31.2%–42.1% higher mean grain yields than the best commercial check under drought and well-watered conditions, respectively. Among the intermediate-maturing hybrids, the top 10 hybrids produced 25.2%–47.7% and 8.5%–13.5% higher grain yield than commercial checks under drought stress and well-watered conditions, respectively, suggesting improvement in the levels of drought tolerance in both early- and intermediate-maturing hybrids. GGE biplot analysis and a bi-segmented regression linear method identified specific early-maturing and intermediate-maturing hybrids that performed well under both well-watered and drought stress conditions. These hybrids could be recommended for commercial production in eastern Africa. Kakamega in Kenya was found to be the most representative and highly discriminating site among well-watered testing locations, while Kabuku in Tanzania was the least representative of test locations. For testing under drought stress conditions, Kiboko in Kenya was identified as the most representative location. This information could be useful for allocating resources and streamlining CIMMYT maize hybrid testing in eastern Africa.en_US
dc.identifier.citationRezende, W. S., Beyene, Y., Mugo, S., Ndou, E., Gowda, M., Sserumaga, J. P., ... & Prasanna, B. M. (2020). Performance and yield stability of maize hybrids in stress-prone environments in eastern Africa. The crop journal, 8(1), 107-118. https://doi.org/10.1016/j.cj.2019.08.001en_US
dc.identifier.urihttps://doi.org/10.1016/j.cj.2019.08.001
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/7377
dc.language.isoenen_US
dc.publisherThe crop journalen_US
dc.subjectDrought stressen_US
dc.subjectEastern Africaen_US
dc.subjectGenotype by environment interactionen_US
dc.subjectYield stabilityen_US
dc.subjectZea mays L.en_US
dc.titlePerformance and yield stability of maize hybrids in stress-prone environments in eastern Africaen_US
dc.typeArticleen_US
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