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Genetic mapping of a novel powdery mildew resistance gene in wild emmer wheat from “Evolution Canyon” in Mt. Carmel Israel

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Abstract

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A single dominant powdery mildew resistance gene MlNFS10 was identified in wild emmer wheat and mapped within a 0.3cM genetic interval spanning a 2.1Mb physical interval on chromosome arm 4AL.

Abstract

Wheat powdery mildew caused by Blumeria graminis forma specialis tritici (Bgt) is a globally devastating disease. The use of powdery mildew resistance genes from wild relatives of wheat is an effective method of disease management. Our previous research has shown that disruptive ecological selection has driven the discrete adaptations of the wild emmer wheat population on the south facing slope (SFS) and north facing slope (NFS) at the microsite of “Evolution Canyon” at Mount Carmel, Israel and demonstrated that 16 accessions in the NFS population display high resistance to 11 powdery mildew isolates (collected from different wheat fields in China). Here, we constructed bi-parental population by crossing the accession NFS-10 (resistant to 22 Bgt races collected from China in seedling resistance screen) and the susceptible line SFS2-12. Genetic analysis indicated that NFS-10 carries a single dominant gene, temporarily designated MlNFS10. Ultimately, 13 markers were successfully located within the long arm of chromosome 4A, thereby delineating MlNFS10 to a 0.3 cM interval covering 2.1 Mb (729275816-731365462) in the Chinese Spring reference sequence. We identified disease resistance-associated genes based on the RNA-seq analysis of both parents. The tightly linked InDel marker XWsdau73447 and SSR marker XWsdau72928 were developed and used for marker-assisted selection when MlNFS10 was introgressed into a hexaploid wheat background. Therefore, MlNFS10 can be used for improvement of germplasm in breeding programs for powdery mildew resistant cultivars.

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Acknowledgements

This study was performed at the State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai’an, China, and supported by the National Key Research and Development Program (2016YFD0100102-2), the National Key Program on Transgenic Research from the Ministry of Agriculture of China (2016ZX08002003-002, 2016ZX08009-003), a grant from the Agricultural Variety Improvement Project of Shandong Province (2019LZGC016), and the Foundation for High-level Talents of Qingdao Agriculture University (6631119057). Eviatar Nevo thanks the Ancell-Teicher Research Foundation for Genetics and Molecular Biology for financing all studies at Evolution Canyon I.

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Authors

Contributions

LK and HW designed the research; HY, PL, and YY conducted the research; PL, YY, and CB prepared the samples; HY, XF, FN, and YH analyzed the data; HY wrote the draft; LK, HW, AL, XL, XM, XD, and EN made the revision of the manuscript. All authors read and approved the manuscript.

Corresponding authors

Correspondence to Hongwei Wang, Eviatar Nevo or Lingrang Kong.

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The authors declare that they have no competing interests.

Ethical standards

I declare on behalf of my co-authors that the work described is original, previously unpublished research, and not under consideration for publication elsewhere. The experiments in this study comply with the current laws of China.

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Communicated by Beat Keller.

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Yin, H., Fang, X., Li, P. et al. Genetic mapping of a novel powdery mildew resistance gene in wild emmer wheat from “Evolution Canyon” in Mt. Carmel Israel. Theor Appl Genet 134, 909–921 (2021). https://doi.org/10.1007/s00122-020-03741-7

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  • DOI: https://doi.org/10.1007/s00122-020-03741-7

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