Adaptive evolution in a spatially structured asexual population

We study the process of adaptation in a spatially structured asexual haploid population. The model assumes a local competition for replication, where each organism interacts only with its nearest neighbors. We observe that the substitution rate of beneficial mutations is smaller for a spatially stru...

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Bibliographic Details
Published in:Genetica 2006-05, Vol.127 (1-3), p.217-229
Main Authors: Gordo, Isabel, Campos, Paulo R A
Format: Article
Language:English
Subjects:
Adaptation, Biological - genetics
Amino Acid Substitution - genetics
Competition
Competitive Behavior
Demography
Evolution
Evolution & development
Evolution, Molecular
Models, Genetic
Mutation
Mutation - physiology
Poisson Distribution
Probability
Reproduction, Asexual - physiology
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Summary:We study the process of adaptation in a spatially structured asexual haploid population. The model assumes a local competition for replication, where each organism interacts only with its nearest neighbors. We observe that the substitution rate of beneficial mutations is smaller for a spatially structured population than that seen for populations without structure. The difference between structured and unstructured populations increases as the adaptive mutation rate increases. Furthermore, the substitution rate decreases as the number of neighbors for local competition is reduced. We have also studied the impact of structure on the distribution of adaptive mutations that fix during adaptation.
ISSN:0016-6707
1573-6857
DOI:10.1007/s10709-005-4012-9