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Identification of isolate specific sources of scald resistance in Turkish barley (Hordeum vulgare) accessions

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Abstract

Disease reactions to specific Rhynchosporium secalis isolates from western Canada were characterized on forty Turkish Hordeum vulgare accessions. One accession, MEH151-1, exhibited resistance against isolate WRS1860 and was also resistant to isolates WRS1493 and WRS1824 which were avirulent to the Rh gene. A related line, MEH151-2 exhibited resistance to WRS1493 but not to WRS1860. Crosses between both MEH151-1 and MEH151-2, and the susceptible cultivar, Harrington, were used to demonstrate a linkage between resistance to WRS1493 and an allele specific amplicon, Falc666. Resistance to WRS1860 imparted by MEH151-1 was mapped to the other side of the Falc666 locus. Falc666 was previously shown to be located near the centromere on the long arm of chromosome 3. Characterization of the genetic basis for the scald resistance phenotype exhibited by these Turkish accessions, coupled with the identification of marker linkages, provides evidence for genetic variation in scald resistance in this chromosomal region.

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Authors and Affiliations

  1. Cereal Research Centre, Agriculture and Agri-Food Canada, 195 Dafoe Road, Winnipeg, Manitoba, Canada, R3T 2M9

    G.A. Penner & A. Tekauz

  2. Research Centre, Agriculture and Agri-Food Canada, P.O. Box 1000A, R.R. #5, Brandon Manitoba, Canada, R7A 5Y3

    W.G. Legge

Authors
  1. G.A. Penner
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  2. W.G. Legge
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  3. A. Tekauz
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Penner, G., Legge, W. & Tekauz, A. Identification of isolate specific sources of scald resistance in Turkish barley (Hordeum vulgare) accessions. Euphytica 99, 111–114 (1998). https://doi.org/10.1023/A:1018344826383

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  • DOI: https://doi.org/10.1023/A:1018344826383

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