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Vr 2 : a new apple scab resistance gene

Patocchi, A. ; Bigler, B. ; Koller, B. ; Kellerhals, M. ; Gessler, C.

In: Theoretical and Applied Genetics, 2004, vol. 109, no. 5, p. 1087-1092

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    Title
    • Vr 2
      a new apple scab resistance gene
    Author
    • Patocchi, A.. Plant Pathology Group, Institute of Plant Sciences, Swiss Federal Institute of Technology, 8092, Zürich, Switzerland
    • Bigler, B.. Plant Pathology Group, Institute of Plant Sciences, Swiss Federal Institute of Technology, 8092, Zürich, Switzerland
    • Koller, B.. Plant Pathology Group, Institute of Plant Sciences, Swiss Federal Institute of Technology, 8092, Zürich, Switzerland
    • Kellerhals, M.. Agroscope FAW Wädenswil, 8820, Wädenswil, Switzerland
    • Gessler, C.. Plant Pathology Group, Institute of Plant Sciences, Swiss Federal Institute of Technology, 8092, Zürich, Switzerland
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Theoretical and Applied Genetics, 2004, vol. 109, no. 5, p. 1087-1092. Springer-Verlag; http://www.springer.de
    Other Version
    Classification
    • Agriculture, Agronomy
    OAI-PMH Identifier
    • oai:doc.rero.ch:312118
    Summary
    Reports from several European countries of the breakdown of the Vf resistance, the most frequently used source of resistance in breeding programs against apple scab, emphasize the urgency of diversifying the basis of apple scab resistance and pyramiding different apple scab resistances with the use of their associated molecular markers. GMAL 2473 is an apple scab resistant selection thought to carry the resistance gene Vr. We report the identification by BSA of three AFLP markers and one RAPD marker associated with the GMAL 2473 resistance gene. SSRs associated with the resistance gene were found by (1) identifying the linkage group carrying the apple scab resistance and (2) testing the SSRs previously mapped in the same region. One such SSR, CH02c02a, mapped on linkage group 2, co-segregates with the resistance gene. GMAL 2473 was tested with molecular markers associated with other apple scab resistance genes, and accessions carrying known apple scab resistance genes were tested with the SSR linked to the resistance gene found in GMAL 2473. The results indicate that GMAL 2473 does not carry Vr, and that a new apple scab resistance gene, named Vr 2, has been identified