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Adult plant stem rust resistance in durum wheat Glossy Huguenot: mapping, marker development and validation

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A Correction to this article was published on 17 November 2022

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Abstract

Key message

Adult plant stem rust resistance locus, QSrGH.cs-2AL, was identified in durum wheat Glossy Huguenot and mendelised as Sr63. Markers closely linked with Sr63 were developed.

Abstract

An F3 population from a Glossy Huguenot (GH)/Bansi cross used in a previous Australian study was advanced to F6 for molecular mapping of adult plant stem rust resistance. Maturity differences among F6 lines confounded assessments of stem rust response. GH was crossed with a stem rust susceptible F6 recombinant inbred line (RIL), GHB14 (M14), with similar maturity and an F6:7 population was developed through single seed descent method. F7 and F8 RILs were tested along with the parents at different locations. The F6 individual plants and both parents were genotyped using the 90 K single nucleotide polymorphism (SNP) wheat array. Stem rust resistance QTL on the long arms of chromosomes 1B (QSrGH.cs-1BL) and 2A (QSrGH.cs-2AL) were detected. QSrGH.cs-1BL and QSrGH.cs-2AL were both contributed by GH and explained 22% and 18% adult plant stem rust response variation, respectively, among GH/M14 RIL population. RILs carrying combinations of these QTL reduced more than 14% stem rust severity compared to those that possessed QSrGH.cs-1BL and QSrGH.cs-2AL individually. QSrGH.cs1BL was demonstrated to be the same as Sr58/Lr46/Yr29/Pm39 through marker genotyping. Lines lacking QSrGH.cs-1BL were used to Mendelise QSrGH.cs-2AL. Based on genomic locations of previously catalogued stem rust resistance genes and the QSrGH.cs-2AL map, it appeared to represent a new APR locus and was permanently named Sr63. SNP markers associated with Sr63 were converted to kompetetive allele-specific PCR (KASP) assays and were validated on a set of durum cultivars.

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90 k SNP data is available on request.

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Acknowledgements

We thank Dr W. Spielmeyer for helpful suggestions and Dr R. Hare for providing GH/B F3 population. This project was supported by funds provided through Grains Research and Development Corporation, Australia (CSP00161).

Funding

This project was supported by funds provided through Grains Research and Development Corporation, Australia (CSP00161)

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Authors

Contributions

HB and ES conceived and designed the study and initiated the crosses and phenotyping. RM generated the GHxM14 RILs. MR, J H-E, BB, and RPS did phenotyping. KF and MH did 90 k SNP genotyping. AW did the initial QTL analysis. XX and SC prepared DNA and XX and GP helped with KASP marker analysis. CC and UB performed QTL and statistical analysis and generated the maps. RM wrote the manuscript. All authors read and approved the manuscript.

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Correspondence to Rohit Mago, Harbans Bariana or Evans Lagudah.

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The authors declare that they have no conflict of interest.

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Communicated by Lingrang Kong.

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Mago, R., Chen, C., Xia, X. et al. Adult plant stem rust resistance in durum wheat Glossy Huguenot: mapping, marker development and validation. Theor Appl Genet 135, 1541–1550 (2022). https://doi.org/10.1007/s00122-022-04052-9

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  • DOI: https://doi.org/10.1007/s00122-022-04052-9

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