Theoretical and Applied Genetics

, Volume 93, Issue 8, pp 1310–1318 | Cite as

Components of resistance of leaf rust (Melamspora laricii epitea Kleb./Melampsora ribesii-viminalis Kleb.) in Salix viminalis L.

  • M. Lascoux
  • M. Ramstedt
  • B. Åström
  • U. Gullberg


Selection on partial resistance components, namely latent period, development rate of uredia and number and size of uredia, has been suggested as a means to achieve durable resistance. Three experiments were carried out in growth chambers to assess the impact of environmental and genetic factors on these components in the Salix-Melampsora host-pathogen system. They confirmed the environmental ability of the Melampsora-Salicaceae relationship and provided no definite answer on the possibility of attaining durable resistance through selection on partial resistance components. On the one hand, there is a large amount of heritable variation among clones for most components; on the other hand, all components were extremely sensitive to environmental conditions and isolates, making the development of standard selection methods difficult.

Key words

Durability Melampsora Resistance components Salix 


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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • M. Lascoux
    • 1
  • M. Ramstedt
    • 2
  • B. Åström
    • 2
  • U. Gullberg
    • 1
  1. 1.Department of Plant BreedingUppsala Genetic Center, Swedish University of Agricultural SciencesUppsalaSweden
  2. 2.Department of Plant and Forest ProtectionSwedish University of Agricultural SciencesUppsalaSweden

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