Phenotyping Mediterranean Durum Wheat Landraces for Resistance to Zymoseptoria tritici in Tunisia

dc.creatorBen M’Barek, S.
dc.creatorLaribi, M.
dc.creatorKouki, H.
dc.creatorCastillo, D.
dc.creatorAraar, C.
dc.creatorNefzaoui, M.
dc.creatorAmmar, K.
dc.creatorSaint Pierre, C.
dc.creatorYahyaoui, A.H.
dc.date2022-03-05T01:20:15Z
dc.date2022-03-05T01:20:15Z
dc.date2022
dc.date.accessioned2023-07-17T20:09:03Z
dc.date.available2023-07-17T20:09:03Z
dc.identifierhttps://hdl.handle.net/10883/22011
dc.identifier10.3390/genes13020355
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7513777
dc.descriptionDurum wheat landraces have huge potential for the identification of genetic factors valuable for improving resistance to biotic stresses. Tunisia is known as a hot spot for Septoria tritici blotch disease (STB), caused by the fungus Zymoseptoria tritici (Z. tritici). In this context, a collection of 3166 Mediterranean durum wheat landraces were evaluated at the seedling and adult stages for STB resistance in the 2016–2017 cropping season under field conditions in Kodia (Tunisia). Unadapted/susceptible accessions were eliminated to reach the final set of 1059 accessions; this was termed the Med-collection, which comprised accessions from 13 countries and was also screened in the 2018–2019 cropping season. The Med-collection showed high frequency of resistance reactions, among which over 50% showed an immune reaction (HR) at both seedling and adult growth stages. Interestingly, 92% of HR and R accessions maintained their resistance levels across the two years, confirming the highly significant correlation found between seedling-and adult-stage reactions. Plant Height was found to have a negative significant effect on adult-stage resistance, suggesting that either this trait can influence disease severity, or that it can be due to environmental/epidemiological factors. Accessions from Italy showed the highest variability, while those from Portugal, Spain and Tunisia showed the highest levels of resistance at both growth stages, suggesting that the latter accessions may harbor novel QTLs effective for STB resistance.
dc.languageEnglish
dc.publisherMDPI
dc.relationhttps://www.mdpi.com/2073-4425/13/2/355#supplementary
dc.relationNutrition, health & food security
dc.relationAccelerated Breeding
dc.relationGenetic Innovation
dc.relationCGIAR Research Program on Wheat
dc.relationPrecision Phenotyping Septoria Platform (Tunisia)
dc.relationUnited States Agency for International Development
dc.relationBureau for Resilience and Food Security as part of Feed the Future
dc.relationhttps://hdl.handle.net/10568/126540
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.source2
dc.source13
dc.source2073-4425
dc.sourceGenes
dc.source355
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectDurum Wheat
dc.subjectZymoseptoria tritici
dc.subjectPhenotyping
dc.subjectSources of Resistance
dc.subjectDiversity
dc.subjectAgronomic Traits
dc.subjectAGRONOMIC CHARACTERS
dc.subjectHARD WHEAT
dc.subjectSEEDLINGS
dc.subjectLANDRACES
dc.titlePhenotyping Mediterranean Durum Wheat Landraces for Resistance to Zymoseptoria tritici in Tunisia
dc.typeArticle
dc.typePublished Version
dc.coverageTunisia
dc.coverageBasel (Switzerland)


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