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The escalatory Red Queen: Population extinction and replacement following arms race dynamics in poplar rust
The escalatory Red Queen: Population extinction and replacement following arms race dynamics in poplar rust
- Source :
- Molecular Ecology, Molecular Ecology, Wiley, 2017, 26 (7), pp.1902-1918. ⟨10.1111/mec.13980⟩
- Publication Year :
- 2017
- Publisher :
- HAL CCSD, 2017.
-
Abstract
- Host–parasite systems provide convincing examples of Red Queen co-evolutionary dynamics. Yet, a key process underscored in Van Valen's theory – that arms race dynamics can result in extinction – has never been documented. One reason for this may be that most sampling designs lack the breadth needed to illuminate the rapid pace of adaptation by pathogen populations. In this study, we used a 25-year temporal sampling to decipher the demographic history of a plant pathogen: the poplar rust fungus, Melampsora larici-populina. A major adaptive event occurred in 1994 with the breakdown of R7 resistance carried by several poplar cultivars widely planted in Western Europe since 1982. The corresponding virulence rapidly spread in M. larici-populina populations and nearly reached fixation in northern France, even on susceptible hosts. Using both temporal records of virulence profiles and temporal population genetic data, our analyses revealed that (i) R7 resistance breakdown resulted in the emergence of a unique and homogeneous genetic group, the so-called cultivated population, which predominated in northern France for about 20 years, (ii) selection for Vir7 individuals brought with it multiple other virulence types via hitchhiking, resulting in an overall increase in the population-wide number of virulence types and (iii) – above all – the emergence of the cultivated population superseded the initial population which predominated at the same place before R7 resistance breakdown. Our temporal analysis illustrates how antagonistic co-evolution can lead to population extinction and replacement, hence providing direct evidence for the escalation process which is at the core of Red Queen dynamics.
- Subjects :
- 0301 basic medicine
Genotype
Demographic history
rouille du peuplier
[SDV]Life Sciences [q-bio]
Population
antagonisme
Biology
GENETIC-STRUCTURE
F-STATISTICS
Evolution, Molecular
03 medical and health sciences
Belgium
Genetics
évolution des populations
DURABLE RESISTANCE
Selection, Genetic
education
PARASITE COEVOLUTION
Ecology, Evolution, Behavior and Systematics
Plant Diseases
analyse temporelle
education.field_of_study
ALLELE FREQUENCY DATA
Extinction
Virulence
Ecology
Basidiomycota
MELAMPSORA-LARICI-POPULINA
HOST-PATHOGEN METAPOPULATION
Adaptation, Physiological
antagonism
interaction hôte parasite
Fixation (population genetics)
Genetic hitchhiking
030104 developmental biology
Genetics, Population
Populus
melampsora larici populina
F-statistics
Red Queen hypothesis
WHEAT YELLOW RUST
time analysis
Host-Pathogen Interactions
COMPUTER-PROGRAM
France
Adaptation
VENTURIA-INAEQUALIS
Microsatellite Repeats
Subjects
Details
- Language :
- English
- ISSN :
- 09621083 and 1365294X
- Database :
- OpenAIRE
- Journal :
- Molecular Ecology, Molecular Ecology, Wiley, 2017, 26 (7), pp.1902-1918. ⟨10.1111/mec.13980⟩
- Accession number :
- edsair.doi.dedup.....2297fc30950699b4dd6729bce5d315d9
- Full Text :
- https://doi.org/10.1111/mec.13980⟩