ArticlePlant biotechnology journal2022
Identification and characterization of Sr22b, a new allele of the wheat stem rust resistance gene Sr22 effective against the Ug99 race group.
Article in Plant biotechnology journal, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed, 34 citations in OpenAlex.
- Characterization of Durum-Einkorn Amphiploids for Introgression of Powdery Mildew Resistance from Einkorn into Common Wheat.Pathogens (Basel, Switzerland) · 2026Article
- LOX-A4 shapes Triticum urartu gene pools and contributions to the A subgenome of polyploid wheat.Nature communications · 2026Article
- Pm37 as a susceptible Sr22 allele confers resistance to wheat powdery mildew and leaf rust.Nature communications · 2026Article
- Discovery of functional NLRs using expression level, high-throughput transformation and large-scale phenotyping.Nature plants · 2025Article
- Fine mapping ofMolecular breeding : new strategies in plant improvement · 2025Article
- Identification ofPlants (Basel, Switzerland) · 2024Article
- Wheat improvement through advances in single nucleotide polymorphism (SNP) detection and genotyping with a special emphasis on rust resistance.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2024Review
- Exploring the Frontier of Wheat Rust Resistance: Latest Approaches, Mechanisms, and Novel Insights.Plants (Basel, Switzerland) · 2024Review
- Mapping and Candidate Gene Analysis of an All-Stage Stem Rust Resistance Gene in Durum Wheat Landrace PI 94701.Plants (Basel, Switzerland) · 2024Article
- Genome-wide atlas of rust resistance loci in wheat.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2024Review
- A near-complete genome sequence of einkorn wheat provides insight into the evolution of wheat A subgenomes.Plant communications · 2024Article
- Molecular Mechanisms of the Co-Evolution of Wheat and Rust Pathogens.Plants (Basel, Switzerland) · 2023Review
- High-resolution mapping of SrTm4, a recessive resistance gene to wheat stem rust.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2023Article
- Identification of wheat stem rust resistance genes in wheat cultivars from Hebei province, China.Frontiers in plant science · 2023Article
- Wheat Genes Associated with Different Types of Resistance against Stem Rust (Pathogens (Basel, Switzerland) · 2022Review
- Identification and characterization of Sr22b, a new allele of the wheat stem rust resistance gene Sr22 effective against the Ug99 race group.Plant biotechnology journal · 2022Article
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Authors and funding
11 authors at 6 institutions in 3 countries.
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Abstract
Wheat stem (or black) rust, caused by Puccinia graminis f. sp. tritici (Pgt), has been historically among the most devastating global fungal diseases of wheat. The recent occurrence and spread of new virulent races such as Ug99 have prompted global efforts to identify and isolate more effective stem rust resistance (Sr) genes. Here, we report the map-based cloning of the Ug99-effective SrTm5 gene from diploid wheat Triticum monococcum accession PI 306540 that encodes a typical coiled-coil nucleotide-binding leucine-rich repeat protein. This gene, designated as Sr22b, is a new allele of Sr22 with a rare insertion of a large (13.8-kb) retrotransposon into its second intron. Biolistic transformation of an ~112-kb circular bacterial artificial chromosome plasmid carrying Sr22b into the susceptible wheat variety Fielder was sufficient to confer resistance to stem rust. In a survey of 168 wheat genotypes, Sr22b was present only in cultivated T. monococcum subsp. monococcum accessions but absent in all tested tetraploid and hexaploid wheat lines. We developed a diagnostic molecular marker for Sr22b and successfully introgressed a T. monococcum chromosome segment containing this gene into hexaploid wheat to accelerate its deployment and pyramiding with other Sr genes in wheat breeding programmes. Sr22b can be a valuable component of gene pyramids or transgenic cassettes combining different resistance genes to control this devastating disease.
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