Evolution of a population of random Boolean networks

Details Evolution of a population of random Boolean networks Evolution of a population of random Boolean networks

2008-08-18

arxiv.org/abs/0808.2490v1

Biology

Quantitative Biology

Populations and Evolution

10 pages, 17 pictures

Scientific paper

10.1140/epjb/e2009-00032-8

We investigate the evolution of populations of random Boolean networks under selection for robustness of the dynamics with respect to the perturbation of the state of a node. The fitness landscape contains a huge plateau of maximum fitness that spans the entire network space. When selection is so strong that it dominates over drift, the evolutionary process is accompanied by a slow increase in the mean connectivity and a slow decrease in the mean fitness. Populations evolved with higher mutation rates show a higher robustness under mutations. This means that even though all the evolved populations exist close to the plateau of maximum fitness, they end up in different regions of network space.

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