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Local adaptation and population structure at a micro‐geographical scale of a fungal parasite on its host plant
Author(s) -
CAPELLE J.,
NEEMA C.
Publication year - 2005
Publication title -
journal of evolutionary biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.289
H-Index - 128
eISSN - 1420-9101
pISSN - 1010-061X
DOI - 10.1111/j.1420-9101.2005.00951.x
Subject(s) - biology , local adaptation , pathosystem , adaptation (eye) , gene flow , host (biology) , population , amplified fragment length polymorphism , ecology , evolutionary biology , genetic diversity , genetics , gene , genetic variation , demography , neuroscience , sociology
Local adaptation, which has been detected for several wild pathosystems is influenced by gene flow and recombination. In this study, we investigate local adaptation and population structure at a fine scale in wild populations of a plant‐pathogen fungus. We sampled hierarchically strains of Colletotrichum lindemuthianum in a wild population of its host. The analysis of AFLP patterns obtained for 86 strains indicated that: (i) many different haplotypes can be discriminated, although occurrence of recombination could not be shown; (ii) migration between adjacent plants seemed rare during the season; and (iii) neutral diversity is structured according to groups of plants and individual host plants. Furthermore, we tested for the occurrence of local adaptation using a cross‐inoculation experiment. Our results showed local adaptation at the scale of the individual host plant. These results indicate that fine‐scale dynamics has evolutionary consequences in this pathosystem.