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Related Experiment Video

Updated: Jul 6, 2026

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Published on: March 13, 2014

Environmental heterogeneity enhances clonal interference.

Paulo R A Campos¹, Pedro S C A Neto, Viviane M de Oliveira

¹Departamento de Física, Universidade Federal Rural De Pernambuco 52171-900, Dois Irmãos, Recife-Pe, Brazil. paulo.campos@df.ufrpe.br

Evolution; International Journal of Organic Evolution

|March 28, 2008

Summary

This summary is machine-generated.

Clonal interference (CI) in asexual microbes is influenced by gene flow and spatial variation. Low migration and high environmental heterogeneity enhance CI, impacting adaptive evolution rates.

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Area of Science:

Evolutionary Biology
Population Genetics

Background:

Clonal interference (CI) is a significant factor in the adaptation of large asexual populations with high mutation rates.
Understanding the interplay of gene flow and spatial heterogeneity is crucial for predicting microbial evolution.

Purpose of the Study:

To investigate how gene flow and spatial variation in selection strength affect clonal interference and adaptation in asexual populations.
To determine the conditions under which spatial heterogeneity enhances or diminishes the rate of adaptive evolution.

Main Methods:

A theoretical model of a subdivided asexual population with migration between patches.
Analysis of adaptation driven by new beneficial mutations with patch-dependent fitness effects.
Examination of the impact of varying migration rates and environmental heterogeneity levels.

Main Results:

Spatial variation in selection pressure alters the rate of adaptive evolution, with effects contingent on gene flow levels.
Low migration rates combined with high environmental heterogeneity intensify clonal interference.
High migration rates can lead to a higher fixation rate of adaptive mutations in heterogeneous environments.

Conclusions:

Gene flow and spatial heterogeneity are key modulators of clonal interference and adaptive evolution in asexual microbes.
Environmental heterogeneity can either enhance or counteract clonal interference depending on migration dynamics.
Complex interactions between migration, heterogeneity, and selection shape the evolutionary trajectories of asexual populations.