Template coexistence in prebiotic vesicle models

Details Template coexistence in prebiotic vesicle models Template coexistence in prebiotic vesicle models

2005-05-25

arxiv.org/abs/q-bio/0505048v2

Eur. Phys. J. B 47, 423-429 (2005)

Biology

Quantitative Biology

Populations and Evolution

7 pages, 8 figures

Scientific paper

10.1140/epjb/e2005-00346-5

The coexistence of distinct templates is a common feature of the diverse proposals advanced to resolve the information crisis of prebiotic evolution. However, achieving robust template coexistence turned out to be such a difficult demand that only a class of models, the so-called package models, seems to have met it so far. Here we apply Wright's Island formulation of group selection to study the conditions for the coexistence of two distinct template types confined in packages (vesicles) of finite capacity. In particular, we show how selection acting at the level of the vesicles can neutralize the pressures towards the fixation of any one of the template types (random drift) and of the type with higher replication rate (deterministic competition). We give emphasis to the role of the distinct generation times of templates and vesicles as yet another obstacle to coexistence.

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