panmixis


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Related to panmixis: panmictic

panmixis

[pan′mik·səs]
(biology)
Random mating within a breeding population; in a closed population this results in a high degree of uniformity.
References in periodicals archive ?
These values theoretically bound the region between samples in which gene flow is less important than random genetic drift and those in which gene flow should be dominant, producing panmixis.
For example, selection among divergent gene combinations fixed in different demes may allow the species to either adapt faster or reach a higher fitness peak than would be possible with panmixis, regardless of whether divergence was due to drift (as postulated by the SBT) or to selection.
The net effect is to increase the effective population size of the mt-genome, when the species population as a whole is considered, because alternate haplotypes become locally fixed, resulting in the species population being more polymorphic than expected if there were specieswide panmixis.
The rapid divergence permissable under the diffusion-modified Fisher process effectively acts as a temporal barrier to gene flow, with divergence at particular points in space occuring over a time scale well below that of panmixis.
Third, in populations close to panmixis, alleles at different loci are likely to show similar patterns of variation only if they are subject to similar selection pressures.
The intercept of the regression serves as an estimator of Wright's (1946) neighborhood size, or the number of individuals in an area of panmixis (Slatkin and Maddison 1990; Slatkin 1993).