Dresden 2017 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 22: Posters - Statistical Physics of Biological Systems

DY 22.4: Poster

Dienstag, 21. März 2017, 14:00–16:00, P1A

Recombination and Speciation on Fitness Landscapes — •Alexander Klug and Joachim Krug — Institut für Theoretische Physik, Universität zu Köln, Germany

Deterministic evolution models with selection, mutation and recombination display multiple stable stationary states in one realisation of a fitness landscape [1]. These distinct stationary states are mostly sharply peaked, which implies that the major part of the population of one stationary state has the same genotype, even in the presence of mutation. The populated genotypes of different stationary states can then be thought of as different species, because they differ in a number of loci and are stable. We are investigating various aspects of these stationary states, such as the number of distinct stationary states that exist in different landscapes models (House-of-Cards model, percolation model [2]) and the properties of their basins of attraction under the deterministic dynamics. The results are interpreted in the context of the concepts of Dobzhansky-Muller incompatibility [1] and mutational robustness [3].

[1] T. Paixao, K. E. Bassler, R. B. R. Azevedo, bioRxiv 008268

[2] S. Gavrilets, Trends Ecol. Evol. 12:307-12 (1997)

[3] E. van Nimwegen, J. P. Crutchfield, M. Huynen, PNAS 96:9716-9720 (1999)