Journal Article10.1111/J.0014-3820.2001.TB00633.X
Genetic variation in a host-parasite association: potential for coevolution and frequency-dependent selection.
TL;DR: In correspondence analysis, some host clones, although distinguishable with neutral genetic markers, were susceptible to the same set of parasite isolates and thus probably shared resistance genes, consistent with the idea that parasites track specific host genotypes under natural conditions.
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Abstract: Models of host-parasite coevolution assume the presence of genetic variation for host resistance and parasite infectivity, as well as genotype-specific interactions. We used the freshwater crustacean Daphnia magna and its bacterial microparasite Pasteuria ramosa to study genetic variation for host susceptibility and parasite infectivity within each of two populations. We sought to answer the following questions: Do host clones differ in their susceptibility to parasite isolates? Do parasite isolates differ in their ability to infect different host clones? Are there host clone-parasite isolate interactions? The analysis revealed considerable variation in both host resistance and parasite infectivity. There were significant host clone-parasite isolate interactions, such that there was no single host clone that was superior to all other clones in the resistance to every parasite isolate. Likewise, there was no parasite isolate that was superior to all other isolates in infectivity to every host clone. This form of host clone-parasite isolate interaction indicates the potential for coevolution based on frequency-dependent selection. Infection success of original host clone-parasite isolate combinations (i.e., those combinations that were isolated together) was significantly higher than infection success of novel host clone-parasite isolate combinations (i.e., those combinations that were created in the laboratory). This finding is consistent with the idea that parasites track specific host genotypes under natural conditions. In addition, correspondence analysis revealed that some host clones, although distinguishable with neutral genetic markers, were susceptible to the same set of parasite isolates and thus probably shared resistance genes.
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Citations
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References
•Book
The Coevolutionary Process
John N. Thompson
- 15 Nov 1994
TL;DR: The geographic mosaic theory of coevolution was proposed by Thompson as discussed by the authors to understand the development of reciprocal adaptations and specializations in interdependent species, using examples of species interaction from a range of taxa.
2K
Sex versus non-sex versus parasite
TL;DR: It is shown that with frequency dependence sufficiently intense such models generate cycles, and that in certain states of cycling sexual species easily obtain higher long-term geometric mean fitness than any competing monotypic asexual species or mixture of such.
1.3K
Sexual reproduction as an adaptation to resist parasites (a review)
TL;DR: P parasite coevolution is superior to previous models of the evolution of sex by supporting the stability of sex under the following challenging conditions: very low fecundity, realistic patterns of genotype fitness and changing environment, and frequent mutation to parthenogenesis, even while sex pays the full 2-fold cost.
1.3K
Correspondence Analysis Handbook
Benzecri
- 22 Jan 1992
TL;DR: A numerical example of correspondence - analysis exercise illustrating the theory reading and interpretation of the listings analysis and interpretation cluster analysis - agglomerative hierarchical clustering.
860
ADaM, an artificial freshwater for the culture of zooplankton
TL;DR: An artificial freshwater for the culture of zooplankton was developed that guarantees the same successful long-term rearing of stock cultures and high fitness of the animals as natural water and has the advantages of standardization and reproducibility.
673