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Euphytica

, Volume 92, Issue 3, pp 367–374 | Cite as

The genetic basis of scald resistance in western Canadian barley cultivars

  • G. A. Penner
  • A. Tekauz
  • E. Reimer
  • G. J. Scoles
  • B. G. Rossnagel
  • P. E. Eckstein
  • W. G. Legge
  • P. A. Burnett
  • T. Ferguson
  • J. F. Helm
Article

Summary

The genetic basis of resistance to scald (Rhynchosporium secalis) within barley breeding populations is poorly understood. The design of effective genetically based resistance strategies is predicated on knowledge of the identity of the resistance genes carried by potential parents. The resistance exhibited by a broad selection of western Canadian barley lines was investigated by evaluating their reactions to five R. secalis isolates. Results were compared to the resistance exhibited by previously characterized lines. This comparison, combined with pedigree analysis indicated that there are two different resistance genes present inwwestern Canadian cultivars. These genes were shown to be independent through analysis of a segregating population derived from a cross between Falcon and CDC Silky. This evidence, along with observed linkage of the gene in CDC Silky with an allele specific amplicon developed for a Rhynchosporium secalis resistance locus on chromosome 3, provides evidence that the gene in Falcon is the Rh2 gene derived from Atlas, and the gene (s) in CDC Silky is located within the Rh/Rh3/Rh4 cluster and is similar to the Rh gene in Hudson.

Key words

marker-assisted selection genetics barley Hordeum vulgare scald Rhynchosporium secalis Canada 

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • G. A. Penner
    • 1
  • A. Tekauz
    • 1
  • E. Reimer
    • 1
  • G. J. Scoles
    • 2
  • B. G. Rossnagel
    • 3
  • P. E. Eckstein
    • 2
  • W. G. Legge
    • 4
  • P. A. Burnett
    • 5
  • T. Ferguson
    • 6
  • J. F. Helm
    • 7
  1. 1.Agriculture and Agri-Food Canada, Winnipeg Research CentreWinnipegCanada
  2. 2.Department of Crop Science and Plant EcologyUniversity of SaskatchewanSaskatoonCanada
  3. 3.Crop Development CentreUniversity of SaskatchewanSaskatoonCanada
  4. 4.Agriculture and Agri-Food Canada, Brandon Research CentreBrandonCanada
  5. 5.Agriculture and Agri-Food Canada, Lacombe Research CentreLacombeCanada
  6. 6.Alberta Wheat PoolCalgaryCanada
  7. 7.Field Crop Development Centre, Alberta AgricultureLacombeCanada

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