https://doi.org/10.1140/epjb/e2007-00260-x
Speed of adaptation in structured populations
1
Departamento de Estatística e Informática, Universidade Federal Rural de Pernambuco, 52171-900, Dois Irmãos, Recife, PE, Brazil
2
Departamento de Física, CCEN, Universidade Federal da Paraíba, Caixa Postal 5008, 58051-970 João Pessoa, PB, Brazil
3
Departamento de Física, Universidade Federal Rural de Pernambuco, 52171-900, Dois Irmãos, Recife, PE, Brazil
Corresponding authors: a viviane@deinfo.ufrpe.br - b arosas@fisica.ufpb.br - c paulo.campos@df.ufrpe.br
Received:
12
February
2007
Revised:
9
August
2007
Published online:
5
October
2007
Adaptation of populations takes place with the occurrence and subsequent fixation of mutations that confer some selective advantage to the individuals which acquire it. For this reason, the study of the process of fixation of advantageous mutations has a long history in the population genetics literature. Particularly, the previous investigations aimed to find out the main evolutionary forces affecting the strength of natural selection in the populations. In the current work, we investigate the dynamics of fixation of beneficial mutations in a subdivided population. The subpopulations (demes) can exchange migrants among their neighbors, in a migration network which is assumed to have either a random graph or a scale-free topology. We have observed that the migration rate drastically affects the dynamics of mutation fixation, despite of the fact that the probability of fixation is invariant on the migration rate, accordingly to Maruyama's conjecture. In addition, we have noticed a topological dependence of the adaptive evolution of the population when clonal interference becomes effective.
PACS: 87.23.Kg – Dynamics of evolution / 87.15.Aa – Theory and modeling; computer simulation
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007