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The oat line Pc54 as a source of resistance to crown rust, stem rust and powdery mildew in Europe

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Summary

The oat line Pc54 was found to be resistant to powdery mildew under both field and glasshouse conditions. The ratio of resistant to susceptible F2 and F2 progeny of a cross between a selection from the Pc54 line (Cc7422) and a susceptible cultivar (Selma) showed that, in addition to carrying the crown rust resistance gene Pc54 and the pg15 gene for stem rust resistance, the mildew resistance of the Pc54 line was conditioned by a single incompletely dominant gene along with additional factors which modified the expression of resistance. Previous results, that there was no linkage between genes Pc54 and Pg15, were confirmed. In addition, there was no evidence of linkage between the mildew resistance gene and gene Pc54. Evaluation of selections from within the Pc54 line showed that the expression of both stem rust and mildew resistance was modified by, or linked to, plant height. The effectiveness of genes Pc54 and Pg15, as measured by virulence frequencies, in central and eastern Europe is described.

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Authors and Affiliations

  1. Research Institute for Crop Production, 16106 Praha 6, 507, Ruzyne, Czech Republic

    J. Sebesta

  2. AFRC Institute of Grassland and Environmental Research, Welsh Plant Breeding Station, Plas Gogerddan, SY23 3EB, Aberystwyth, U.K.

    H. W. Roderick

  3. Agriculture Canada Research Station, 195 Dafoe Road, R3T 2M9, Winnipeg, Manitoba, Canada

    J. Chong & D. E. Harder

Authors
  1. J. Sebesta
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  2. H. W. Roderick
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  3. J. Chong
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  4. D. E. Harder
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Sebesta, J., Roderick, H.W., Chong, J. et al. The oat line Pc54 as a source of resistance to crown rust, stem rust and powdery mildew in Europe. Euphytica 71, 91–97 (1993). https://doi.org/10.1007/BF00023471

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  • DOI: https://doi.org/10.1007/BF00023471

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