Partial resistance in the Linum-Melampsora host-pathogen system: does partial resistance make the red queen run slower?

ABSTRACT: 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 w

SUBMITTER: Antonovics J 

PROVIDER: S-EPMC3155823 | biostudies-literature | 2011 Feb

REPOSITORIES: biostudies-literature