PARTIAL RESISTANCE IN THE LINUM-MELAMPSORA HOST–PATHOGEN SYSTEM: DOES PARTIAL RESISTANCE MAKE THE RED QUEEN RUN SLOWER?
Article first published online: 5 NOV 2010
© 2010 The Author(s). Evolution© 2010 The Society for the Study of Evolution
Volume 65, Issue 2, pages 512–522, February 2011
How to Cite
Antonovics, J., Thrall, P. H., Burdon, J. J. and Laine, A.-L. (2011), PARTIAL RESISTANCE IN THE LINUM-MELAMPSORA HOST–PATHOGEN SYSTEM: DOES PARTIAL RESISTANCE MAKE THE RED QUEEN RUN SLOWER?. Evolution, 65: 512–522. doi: 10.1111/j.1558-5646.2010.01146.x
- Issue published online: 27 JAN 2011
- Article first published online: 5 NOV 2010
- Accepted manuscript online: 1 OCT 2010 06:58AM EST
- Received November 20, 2009, Accepted August 31, 2010
- plant disease
Five levels of disease expression were scored in a cross-inoculation study of 120 host and 60 pathogen lines of wild flax Linum marginale and its rust fungus Melampsora lini sampled from six natural populations. Patterns of partial resistance showed clear evidence of gene-for-gene interactions, with particular levels of partial resistance occurring in specific host–pathogen combinations. Sympatric and putatively more highly coevolved host–pathogen combinations had a lower frequency of partial resistance types relative to allopatric combinations. Sympatric host–pathogen combinations also showed a lower diversity of resistance responses, but there was a trend toward a greater fraction of this variance being determined by pathogen-genotype × host-genotype interactions. In this system, there was no evidence that partial resistances slow host–pathogen coevolution. The analyses show that if variation is generated by among population host or pathogen dispersal, then coevolution occurs largely by pathogens overcoming the partial resistances that are generated.