Evolvability is a Selectable Trait

Details Evolvability is a Selectable Trait Evolvability is a Selectable Trait

2004-07-07

arxiv.org/abs/q-bio/0407012v1

Biology

Quantitative Biology

Populations and Evolution

21 pages, 4 figures, to appear in Proc. Natl. Acad. Sci. USA

Scientific paper

10.1073/pnas.0404656101

Concomitant with the evolution of biological diversity must have been the evolution of mechanisms that facilitate evolution, due to the essentially infinite complexity of protein sequence space. We describe how evolvability can be an object of Darwinian selection, emphasizing the collective nature of the process. We quantify our theory with computer simulations of protein evolution. These simulations demonstrate that rapid or dramatic environmental change leads to selection for greater evolvability. The selective pressure for large scale genetic moves, such as DNA exchange, becomes increasingly strong as the environmental conditions become more uncertain. Our results demonstrate that evolvability is a selectable trait and allow for the explanation of a large body of experimental results.

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