, 215:29 | Cite as

Mapping and DNA marker development for Lr33 from the leaf rust resistant line KU168-2

  • Mingzhe Che
  • Colin W. Hiebert
  • Curt A. McCartney
  • Zhongjun Zhang
  • Brent D. McCallumEmail author


A wheat accession from the Kyoto University Collection, KU168-2, was identified as carrying good resistance to leaf rust and stem rust. To analyze this resistance a doubled haploid (DH) population was produced from hybrids of the cross KU168-2 with the leaf rust susceptible line RL6071. The DH population, of 116 lines, was evaluated for leaf rust resistance in the greenhouse at the seedling and adult plant stages, and in three field environments. Significant effects for reduction in leaf rust severity in the field were found on chromosome 1BL, most likely Lr33, which was also identified in the seedling tests, and on 7DS, which was identified as Lr34 in greenhouse adult plant tests and confirmed with a predictive molecular marker. In field trials, both Lr33 and Lr34 reduced the severity of leaf rust, while the lines with both resistance genes showed additivity of resistance. Similar results were consistently found from 2003 to 2017 testing Thatcher near-isogenic lines with Lr33, Lr34, and Lr33 + Lr34. A genetic map of the Lr33 region was developed and linked SNP markers were converted to KASP markers for the selection of Lr33 in wheat breeding programs. Two additional seedling resistance genes were found, one originating from KU168-2 on 6AL, and one from RL6071 on 7BL, but these genes did not contribute to field resistance.


Leaf rust Lr33 Marker-assisted selection Genes combination Durable resistance 



We would like to thank Elsa Reimer, Winnie McNabb, Mira Popovic, Ghassan Mardli, Suzanne Enns, Leslie Bezte and Devin Edwards for technical assistance. This study was supported by the “Building High Level University Program”/“MOE-AAFC Research Fellowship Program” authorised by China Scholarship Council, AAFC and China Agricultural University.

Authors contribution

MC, CWH, CAM, BDM conceived, designed and managed the experiments. MC evaluated the population, contributed to the construction of the genetic maps, analyzed the data, wrote the first draft, and revised the manuscript. BDM evaluated the populations, analyzed the data, and revised the manuscript. CWH constructed the genetic maps, developed populations and KASP markers, and revised the manuscript. CAM performed the statistical and QTL analyses, and revised the manuscript. BDM, CWH, CAM and ZZ contributed to the grant proposals.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interests.

Statement of human and animal rights

This study did not include human or animal subjects.

Supplementary material

10681_2019_2343_MOESM1_ESM.docx (32 kb)
Supplementary material 1 (DOCX 31 kb)
10681_2019_2343_MOESM2_ESM.docx (277 kb)
Supplementary material 2 (DOCX 277 kb)
10681_2019_2343_MOESM3_ESM.xlsx (61 kb)
Supplementary material 3 (XLSX 61 kb)


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Copyright information

© Crown 2019

Authors and Affiliations

  • Mingzhe Che
    • 1
  • Colin W. Hiebert
    • 2
  • Curt A. McCartney
    • 2
  • Zhongjun Zhang
    • 1
  • Brent D. McCallum
    • 2
    Email author
  1. 1.Department of Plant PathologyChina Agricultural UniversityBeijingPeople’s Republic of China
  2. 2.Morden Research and Development CentreAgriculture and Agri-Food CanadaMordenCanada

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