Sr65: a widely effective gene for stem rust resistance in wheat

Article


Norman, Michael, Chen, Chunhong, Miah, Hanif, Patpour, Mehran, Sørensen, Chris, Hovmøller, Mogens, Forrest, Kerrie, Kumar, Subodh, Prasad, Pramod, Gangwar, Om Prakash, Bhardwaj, Subhash, Bariana, Harbans, Periyannan, Sambasivam and Bansal, Urmil. 2024. "Sr65: a widely effective gene for stem rust resistance in wheat." Theoretical and Applied Genetics: international journal of plant breeding research. 137 (1). https://doi.org/10.1007/s00122-023-04507-7
Article Title

Sr65: a widely effective gene for stem rust resistance in wheat

ERA Journal ID2411
Article CategoryArticle
AuthorsNorman, Michael, Chen, Chunhong, Miah, Hanif, Patpour, Mehran, Sørensen, Chris, Hovmøller, Mogens, Forrest, Kerrie, Kumar, Subodh, Prasad, Pramod, Gangwar, Om Prakash, Bhardwaj, Subhash, Bariana, Harbans, Periyannan, Sambasivam and Bansal, Urmil
Journal TitleTheoretical and Applied Genetics: international journal of plant breeding research
Journal Citation137 (1)
Article Number1
Number of Pages10
Year2024
PublisherSpringer
Place of PublicationGermany
ISSN0040-5752
1432-2242
Digital Object Identifier (DOI)https://doi.org/10.1007/s00122-023-04507-7
Web Address (URL)https://link.springer.com/article/10.1007/s00122-023-04507-7
AbstractStem rust, caused by Puccinia graminis f. sp. tritici (Pgt), threatened global wheat production with the appearance of widely virulent races that included TTKSK and TTRTF. Indian landrace Hango-2 showed resistance to Pgt races in India and Australia. Screening of a Hango-2/Avocet ‘S’ (AvS) recombinant inbred line population identified two stem rust resistance genes, a novel gene (temporarily named as SrH2) from Hango-2 and Sr26 from AvS. A mapping population segregating for SrH2 alone was developed from two recombinant lines. SrH2 was mapped on the short arm of chromosome 1A, where it was flanked by KASP markers KASP_7944 (proximal) and KASP_12147 (distal). SrH2 was delimited to an interval of 1.8–2.3 Mb on chromosome arm 1AS. The failure to detect candidate genes through MutRenSeq and comparative genomic analysis with the pan-genome dataset indicated the necessity to generate a Hango-2 specific assembly for detecting the gene sequence linked with SrH2 resistance. MutRenSeq however enabled identification of SrH2-linked KASP marker sunCS_265. Markers KASP_12147 and sunCS_265 showed 92% and 85% polymorphism among an Australian cereal cultivar diversity panel and can be used for marker-assisted selection of SrH2 in breeding programs. The effectiveness of SrH2 against Pgt races from Europe, Africa, India, and Australia makes it a valuable resource for breeding stem rust-resistant wheat cultivars. Since no wheat-derived gene was previously located in chromosome arm 1AS, SrH2 represents a new locus and named as SR65.
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020300103. Agricultural molecular engineering of nucleic acids and proteins
Public NotesFiles associated with this item cannot be displayed due to copyright restrictions.
Byline AffiliationsUniversity of Sydney
Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia
Aarhus University, Denmark
Agriculture Victoria
Indian Council of Agricultural Research, India
Western Sydney University
School of Agriculture and Environmental Science
Centre for Crop Health
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