Multi-mode fluctuating selection in host-parasite coevolution

Ben Ashby, Mike Boots

Research output: Contribution to journalArticle

  • 4 Citations

Abstract

Understanding fluctuating selection is important for our understanding of patterns of spatial and temporal diversity in nature. Host-parasite theory has classically assumed fluctuations either occur between highly specific genotypes (Matching Alleles: MA) or from specialism to generalism (Gene-for-Gene: GFG). However, while MA can only generate one mode of fluctuating selection, we show that GFG can in fact produce both rapid “within-range” fluctuations (among genotypes with identical levels of investment but which specialise on different subsets of the population) and slower cycling “between ranges” (different levels of investment), emphasising that MA is a subset of GFG. Our findings closely match empirical observations, although sampling rates need to be high to detect these novel dynamics empirically. Within-range cycling is an overlooked process by which fluctuating selection can occur in nature, suggesting that fluctuating selection may be a more common and important process than previously thought in generating and maintaining diversity.
LanguageEnglish
Pages357-365
JournalEcology Letters
Volume20
Issue number3
Early online date29 Jan 2017
DOIs
StatusPublished - Mar 2017

Fingerprint

Coevolution
coevolution
parasite
Genes
parasites
genotype
Cycling
Genotype
genes
Range of data
Fluctuations
Sampling
Gene
alleles
Subset
gene
allele
sampling
Parasites

Keywords

  • host-parasite systems
  • coevolution
  • fluctuating selection
  • infection genetics

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Applied Mathematics

Cite this

Multi-mode fluctuating selection in host-parasite coevolution. / Ashby, Ben; Boots, Mike.

In: Ecology Letters, Vol. 20, No. 3, 03.2017, p. 357-365.

Research output: Contribution to journalArticle

Ashby, Ben ; Boots, Mike. / Multi-mode fluctuating selection in host-parasite coevolution. In: Ecology Letters. 2017 ; Vol. 20, No. 3. pp. 357-365
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