Identification of drought, heat, and combined drought and heat tolerant donors in maize

dc.creatorCairns, J.E.
dc.creatorCrossa, J.
dc.creatorZaidi, P.H.
dc.creatorGrudloyma, P.
dc.creatorSanchez, C.
dc.creatorAraus, J.L.
dc.creatorThaitad, S.
dc.creatorMakumbi, D.
dc.creatorMagorokosho, C.
dc.creatorBänziger, M.
dc.creatorMenkir, A.
dc.creatorHearne, S.
dc.creatorAtlin, G.N.
dc.date2013-11-24T18:23:49Z
dc.date2013-11-24T18:23:49Z
dc.date2013
dc.date.accessioned2023-07-17T19:57:20Z
dc.date.available2023-07-17T19:57:20Z
dc.identifier0011-183X
dc.identifierhttp://hdl.handle.net/10883/3263
dc.identifier10.2135/cropsci2012.09.0545
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7509102
dc.descriptionLow maize (Zea maysL.) yields and the impacts of climate change on maize production highlight the need to improve yields in eastern and southern Africa. Climate projections suggest higher temperatures within drought-prone areas. Research in model species suggests that tolerance to combined drought and heat stress is genetically distinct from tolerance to either stress alone, but this has not been confirmed in maize. In this study we evaluated 300 maize inbred lines testcrossed to CML539. Experiments were conducted under optimal conditions, reproductive stage drought stress, heat stress, and combined drought and heat stress. Lines with high levels of tolerance to drought and combined drought and heat stress were identified. Significant genotype × trial interaction and very large plot residuals were observed; consequently, the repeatability of individual managed stress trials was low. Tolerance to combined drought and heat stress in maize was genetically distinct from tolerance to individual stresses, and tolerance to either stress alone did not confer tolerance to combined drought and heat stress. This finding has major implications for maize drought breeding. Many current drought donors and key inbreds used in widely grown African hybrids were susceptible to drought stress at elevated temperatures. Several donors tolerant to drought and combined drought and heat stress, notably La Posta Sequia C7-F64-2-6-2-2 and DTPYC9-F46-1-2-1-2, need to be incorporated into maize breeding pipelines.
dc.description1335-1346
dc.formatPDF
dc.languageEnglish
dc.publisherCrop Science Society of America (CSSA)
dc.publisherhttps://www.crops.org/publications/cs/abstracts/53/4/1335
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.source4
dc.source53
dc.sourceCrop Science
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectMAIZE
dc.subjectDROUGHT TOLERANCE
dc.subjectHEAT TOLERANCE
dc.subjectCLIMATE CHANGE
dc.subjectGENE INTERACTION
dc.titleIdentification of drought, heat, and combined drought and heat tolerant donors in maize
dc.typeArticle


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