Evaluation of CIMMYT germplasm for resistance to leaf spotting diseases of wheat

dc.creatorSingh P.K.
dc.creatorDuveiller, E.
dc.creatorSingh, R.P.
dc.date2013-06-07T21:12:44Z
dc.date2013-06-07T21:12:44Z
dc.date2011
dc.date.accessioned2023-07-17T19:56:57Z
dc.date.available2023-07-17T19:56:57Z
dc.identifier1212-1975
dc.identifier1805-9325
dc.identifierhttp://hdl.handle.net/10883/2844
dc.identifier10.17221/3263-CJGPB
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7508960
dc.descriptionThe leaf spotting disease complex is a major biotic constrain in enhancing grain production in the major wheat growing regions. Two leaf spotting diseases, tan spot, caused by an ascomycete fungus Pyrenophora tritici-repentis, and Stagonospora nodorum blotch besides causing average yield losses of 5?10%, cause significant losses in grain quality by red smudge, black point and grain shriveling. Conservation agriculture in combination with wheat monoculture involving cultivation of susceptible cultivars has resulted in frequent onset of leaf spots epidemics worldwide. Development of resistant wheat cultivars, in conjunction with crop rotation, will provide an effective, economical, and environmentally safe means of controlling leaf spot. International Maize and Wheat Improvement Center (CIMMYT), Mexico has initiated major efforts to mitigate the threat of tan spot. Efforts include screening of wheat germplasm, identification of new sources of resistance, characterization of new tan spot resistance genes through classical and molecular genetic analysis, incorporation of resistance into adapted cultivars, and assessing the variability in the tan spot fungus. Screening studies reveal that elite CIMMYT germplasm has high level of resistance to tan spot caused by P. tritici-repentis race 1. These germplasm have diverse genetic make-up and the resistance is likely broad based. Association mapping studies done with CIMMYT germplasm reconfirmed the presence of previously identified genomic regions for tan spot resistance; however, novel genomic regions on long arm of chromosomes 6A and 7B have also been identified. Studies done to date indicate that CIMMYT germplasm possess high level diverse genetic based resistance to tan spot of wheat. Efforts are in place to develop desired wheat cultivars with tan spot resistance. Virulence studies indicate presence of P. tritici-repentis race 1 only with some variability in level of toxin Ptr ToxA produced in each of the 76 isolates studied.
dc.descriptionS102-S108
dc.formatPDF
dc.languageEnglish
dc.publisherCzech Academy of Agricultural Sciences
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.sourceSpecial Issue
dc.source47
dc.sourceCzech Journal of Genetics and Plant Breeding
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectPhaeosphaeria nodorum
dc.subjectStagonospora nodorum Blotch
dc.subjectTan Spot
dc.subjectGENETIC RESISTANCE
dc.subjectPYRENOPHORA TRITICI REPENTIS
dc.subjectPLANT DISEASES
dc.titleEvaluation of CIMMYT germplasm for resistance to leaf spotting diseases of wheat
dc.typeArticle


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