Abstract
Stripe rust, caused by Puccinia striiformis f. sp. tritici, is a major threat to global wheat production. To explore new resistance resources, we screened 100 hexaploid triticale accessions using the predominant Chinese P. striiformis f. sp. tritici races CYR32, CYR33 and CYR34 and found that most accessions showed high resistance, with the cultivar Rozovskaya displaying near-immunity. Through map-based cloning, we identified a resistance gene located on chromosome 6RL. Analysis of resequencing data from 117 rye accessions revealed two major haplotypes, both of which conferred near-immunity and broadly effective resistance to stripe rust in transgenic wheat. Sequence analysis and virus-induced gene silencing collectively confirmed the identity of this gene as Yr83. Yr83 encodes an atypical nucleotide-binding and leucine-rich repeat protein (NLR) fused to a Harbinger transposase-derived nuclease domain (HTDND). Truncation of the HTDND abolishes resistance, indicating that this domain is essential for Yr83-mediated immune function. Phylogenetic analysis showed that NLR–HTDND proteins are restricted to the Pooideae subfamily. For breeding applications, we employed a small 6RL translocation line that shows excellent agronomic performance, not only conferring strong resistance but also increasing spikelet number and grain number per spike. Our study reveals a transposase-integrated NLR as a valuable resource for wheat stripe rust resistance breeding.
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Acknowledgements
We thank Z. Ni (China Agricultural University) for providing the triticale germplasm, C. Xu (IGDB, CAS) for providing the MiC-4 expression plasmid, Y. Chen (IGDB, CAS) for his contributions to the protein structure prediction and model assembly, Z. Liu (IGDB, CAS) for providing field mixtures of Pst and Q. Li (Northwest A&F University) for providing Pst races. This work was supported by the National Key Research and Development Program of China (grant no. 2022YFF1003303 to F.H.) and the ‘Biological Breeding—National Science and Technology Major Project’ (grant no. 2023ZD04025 to F.H.).
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F.H. and C.W. designed the research. C.W. contributed to the execution and analysis of most of the experiments. S.F. created the translocation line 6R/6A and characterized its agronomic traits. C.Y. and M.W. were responsible for the genome resequencing data and transcriptome analysis. Y.C. did the genetic transformation of wheat under the guidance of X.Y. C.Z., J.Y. and Y.L. provided assistance with GISH technology, genetic marker development and protein work, respectively. Z.W. and T.W. helped characterize stripe rust resistance in the field. R.F., Y.W., and W.Y. provided constructive suggestions for this work. F.H., X.Y. and Y.L. supervised this study. F.H., Y.L. and C.W. wrote the final version of the paper.
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Wang, C., Fu, S., Yi, C. et al. An NLR–transposase fusion gene from rye provides broadly effective resistance to stripe rust in wheat. Nat. Plants (2026). https://doi.org/10.1038/s41477-026-02248-1
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DOI: https://doi.org/10.1038/s41477-026-02248-1


