Molecular Plant-Microbe Interactions (2007) 20, 1271-1283

From Pestinfo-Wiki
Revision as of 17:27, 16 September 2022 by Bernhard Zelazny (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Ioannis Stergiopoulos, Maarten J.D. De Kock, Pim Lindhout and Pierre J.G.M. De Wit (2007)
Allelic variation in the effector genes of the tomato pathogen Cladosporium fulvum reveals different modes of adaptive evolution
Molecular Plant-Microbe Interactions 20 (10), 1271-1283
Abstract: The allelic variation in four avirulence (Avr) and four extracellular protein (Ecp)-encoding genes of the tomato pathogen Cladosporium fulvum was analyzed for a worldwide collection of strains. The majority of polymorphisms observed in the Avr genes are deletions, point mutations, or insertions of transposon-like elements that are associated with transitions from avirulence to virulence, indicating adaptive evolution of the Avr genes to the cognate C. fulvum resistance genes that are deployed in commercial tomato lines. Large differences in types of polymorphisms between the Avr genes were observed, especially between Avr2 (indels) and Avr4 (amino-acid substitutions), indicating that selection pressure favors different types of adaptation. In contrast, only a limited number of polymorphisms were observed in the Ecp genes, which mostly involved synonymous modifications. A haplotype network based on the polymorphisms observed in the effector genes revealed a complex pattern of evolution marked by reticulations that suggests the occurrence of genetic recombination in this presumed asexual fungus. This, as well as the identification of strains with identical polymorphisms in Avr and Ecp genes but with opposite mating-type genes, suggests that development of complex races can be the combined result of positive selection and genetic recombination.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Ioannis Stergiopoulos

Research topic(s) for pests/diseases/weeds:
molecular biology - genes
resistance/tolerance/defence of host

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Fulvia fulva
Retrieved from "https://wiki.pestinfo.org/w/index.php?title=Molecular_Plant-Microbe_Interactions_(2007)_20,_1271-1283&oldid=572409"