Phase Diagrams of Quasispecies Theory with Recombination and Horizontal Gene Transfer

Details Phase Diagrams of Quasispecies Theory with Recombination and Horizontal Gene Transfer Phase Diagrams of Quasispecies Theory with Recombination and Horizontal Gene Transfer

2006-12-14

arxiv.org/abs/q-bio/0612027v1

Biology

Quantitative Biology

Populations and Evolution

5 pages, 1 figure, to appear in Physics Review Letters

Scientific paper

10.1103/PhysRevLett.98.058101

We consider how transfer of genetic information between individuals influences the phase diagram and mean fitness of both the Eigen and the parallel, or Crow-Kimura, models of evolution. In the absence of genetic transfer, these physical models of evolution consider the replication and point mutation of the genomes of independent individuals in a large population. A phase transition occurs, such that below a critical mutation rate an identifiable quasispecies forms. We generalize these models of quasispecies evolution to include horizontal gene transfer. We show how transfer of genetic information changes the phase diagram and mean fitness and introduces metastability in quasispecies theory, via an analytic field theoretic mapping.

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