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resumen

Resumen
During the last two decades, new virulent and aggressive races of Puccinia striiformis Westend. f. sp. tritici (Pst) have spread worldwide, causing devastating epidemics and prompting the search for new sources of resistance in wheat (Triticum aestivum L.). Between 2012 and 2017, we mapped four stripe rust resistance quantitative trait loci (QTL) effective against the Pst races present in California, USA, using recombinant inbred lines (RILs) developed [ver mas...]
dc.contributor.authorCobo, Nicolás
dc.contributor.authorPfluger, Laura Alicia
dc.contributor.authorChen, Xianming
dc.contributor.authorDubcovsky, Jorge
dc.date.accessioned2018-10-08T13:59:59Z
dc.date.available2018-10-08T13:59:59Z
dc.date.issued2018
dc.identifier.issn0011-183X
dc.identifier.issn1435-0653 (Online)
dc.identifier.other10.2135/cropsci2018.04.0286
dc.identifier.urihttp://hdl.handle.net/20.500.12123/3564
dc.identifier.urihttps://dl.sciencesocieties.org/publications/cs/articles/0/0/cropsci2018.04.0286
dc.description.abstractDuring the last two decades, new virulent and aggressive races of Puccinia striiformis Westend. f. sp. tritici (Pst) have spread worldwide, causing devastating epidemics and prompting the search for new sources of resistance in wheat (Triticum aestivum L.). Between 2012 and 2017, we mapped four stripe rust resistance quantitative trait loci (QTL) effective against the Pst races present in California, USA, using recombinant inbred lines (RILs) developed from the cross between the Argentinean cultivars ‘Klein Proteo’ and ‘Klein Chajá’. The RIL population showed transgressive segregation in all six growing seasons relative to the parental lines, which showed moderate levels of Pst resistance. Analyses by year detected QTL conferring adult plant resistance on chromosomes 1BL, 2BS, 3D centromeric (from Klein Chajá), and 4DL (from Klein Proteo). QYr.ucw-1BL, mapped in the Yr29 resistance gene region, was significant in all seasons (P < 0.01) and explained on average 31.0 to 32.8% of the observed variation. QYr.ucw-2BS showed a stronger effect than QYr.ucw-1BL in 2013 but was ineffective in 2014 and 2016. This QTL also conferred seedling resistance, suggesting that it is an all-stage resistance gene. Centromeric QYr.ucw-3D and QYr.ucw-4DL showed smaller effects than the previous QTL and were significant only in some of the experiments. No significant interactions were detected among QTL, indicating the absence of digenic epistatic effects. The molecular markers identified in this study can be used to combine these genes and accelerate their deployment in wheat breeding programs.eng
dc.formatapplication/pdfeng
dc.language.isoeng
dc.publisherCrop Science Society of Americaeng
dc.rightsinfo:eu-repo/semantics/restrictedAccesseng
dc.sourceCrop science 58 : 1-14. (November–december 2018)eng
dc.subjectWheateng
dc.subjectTrigoes_AR
dc.subjectVariedadeses_AR
dc.subjectVarietieseng
dc.subjectEnfermedades de las Plantases_AR
dc.subjectPlant Diseaseseng
dc.subjectRoyaes_AR
dc.subjectRustseng
dc.subjectResistencia a la Enfermedades_AR
dc.subjectDisease Resistanceeng
dc.subjectQuantitative Trait Locieng
dc.subjectLoci de Rasgos Cuantitativoses_AR
dc.subjectTriticum Aestivumes_AR
dc.subjectPuccinia Striiformises_AR
dc.subjectGenetic Markerseng
dc.subjectMarcadores Genéticoses_AR
dc.subject.otherArgentinaes_AR
dc.subject.otherQTLeng
dc.titleMapping QTL for resistance to new virulent races of wheat stripe rust from two Argentinean wheat cultivarseng
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.description.origenInstituto de Recursos Biológicoses_AR
dc.description.filFil: Cobo, Nicolás. University of California. Department of Plant Sciences; Estados Unidos. Howard Hughes Medical Institute; Estados Unidoses_AR
dc.description.filFil: Pfluger, Laura Alicia. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentinaes_AR
dc.description.filFil: Chen, Xianming. Washington State Univ. Wheat Health, Genetics and Quality Research Unit. Department of Plant Pathology; Estados Unidoses_AR
dc.description.filFil: Dubcovsky, Jorge. University of California. Department of Plant Sciences; Estados Unidos. Howard Hughes Medical Institute; Estados Unidoses_AR
dc.subtypecientifico


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