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A multiple resistance locus on chromosome arm 3BS in wheat confers resistance to stem rust (Sr2), leaf rust (Lr27) and powdery mildew

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Abstract

Sr2 is the only known durable, race non-specific adult plant stem rust resistance gene in wheat. The Sr2 gene was shown to be tightly linked to the leaf rust resistance gene Lr27 and to powdery mildew resistance. An analysis of recombinants and mutants suggests that a single gene on chromosome arm 3BS may be responsible for resistance to these three fungal pathogens. The resistance functions of the Sr2 locus are compared and contrasted with those of the adult plant resistance gene Lr34.

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Acknowledgments

We thank Xiaodi Xia and Sutha Chandramohan for their excellent technical assistance. We acknowledge support from Grains Research Development Corporation (GRDC) which is co-funding rust research at CSIRO. We thank Dr Jaroslav Dolezel, Dr Hana Simkova and Dr Catherine Feuillet, who facilitated early access to the chromosome 3B-specific BAC library and 3B physical map information, and Prof Rudi Appels for coordinating the sequencing and annotation of the BAC clones.

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Correspondence to W. Spielmeyer.

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Communicated by F. Ordon.

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Mago, R., Tabe, L., McIntosh, R.A. et al. A multiple resistance locus on chromosome arm 3BS in wheat confers resistance to stem rust (Sr2), leaf rust (Lr27) and powdery mildew. Theor Appl Genet 123, 615–623 (2011). https://doi.org/10.1007/s00122-011-1611-y

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  • DOI: https://doi.org/10.1007/s00122-011-1611-y

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