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Genetic mapping of Stb19, a new resistance gene to Zymoseptoria tritici in wheat

Yang, Nannan; McDonald, Megan; Solomon, Peter; Milgate, Andrew

Description

A new and dominant R gene Stb19 is identified from a soft wheat cultivar 'Lorikeet' and was mapped on the distal region of chromosome 1DS. Two tightly linked KASP markers were also discovered and validated for molecular-assisted breeding programs. A new R gene, designated as Stb19, provides resistance to Zymoseptoria tritici in wheat. This new dominant gene resides on the short arm of chromosome 1D, exhibiting complete resistance to three Z. tritici isolates, WAI332, WAI251, and WAI161, at the...[Show more]

dc.contributor.authorYang, Nannan
dc.contributor.authorMcDonald, Megan
dc.contributor.authorSolomon, Peter
dc.contributor.authorMilgate, Andrew
dc.date.accessioned2019-07-22T06:41:10Z
dc.identifier.issn0040-5752
dc.identifier.urihttp://hdl.handle.net/1885/164651
dc.description.abstractA new and dominant R gene Stb19 is identified from a soft wheat cultivar 'Lorikeet' and was mapped on the distal region of chromosome 1DS. Two tightly linked KASP markers were also discovered and validated for molecular-assisted breeding programs. A new R gene, designated as Stb19, provides resistance to Zymoseptoria tritici in wheat. This new dominant gene resides on the short arm of chromosome 1D, exhibiting complete resistance to three Z. tritici isolates, WAI332, WAI251, and WAI161, at the seedling stage. A genetic linkage map, based on an F2:3 population of 'Lorikeet' and 'Summit,' found the Stb19 gene at a 9.3 cM region on 1DS, closely linked with two Kompetitive Allele-Specific PCR markers, snp_4909967 and snp_1218021. Further, the two markers were tested and validated in another F2:3 population and 266 different wheat accessions, which gave over 95% accuracy of resistance/susceptibility prediction. Combined with the physical location of the identified SNPs and the previous evidence of gene order on chromosome 1DS (centromere-Sr45-Sr33-Lr21-telomere), Stb19 is proposed to be located between Sr33 and Lr21. Thus, the newly discovered Stb19 along with the KASP markers represents an increase in genetic resources available for wheat breeding resistance to Z. tritici.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherSpringer
dc.rights© Crown 2018
dc.sourceTheoretical and Applied Genetics
dc.titleGenetic mapping of Stb19, a new resistance gene to Zymoseptoria tritici in wheat
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume131
dc.date.issued2018
local.identifier.absfor060704 - Plant Pathology
local.identifier.absfor070308 - Crop and Pasture Protection (Pests, Diseases and Weeds)
local.identifier.ariespublicationu3102795xPUB31
local.publisher.urlhttps://link.springer.com
local.type.statusPublished Version
local.contributor.affiliationYang, Nannan, NSW Department of Primary Industries
local.contributor.affiliationMcDonald, Megan, College of Science, ANU
local.contributor.affiliationSolomon, Peter, College of Science, ANU
local.contributor.affiliationMilgate, Andrew, NSW Department of Primary Industries
local.description.embargo2037-12-31
local.bibliographicCitation.issue12
local.bibliographicCitation.startpage2765
local.bibliographicCitation.lastpage2773
local.identifier.doi10.1007/s00122-018-3189-0
local.identifier.absseo820507 - Wheat
dc.date.updated2019-03-31T07:20:41Z
local.identifier.scopusID2-s2.0-85053834391
CollectionsANU Research Publications

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