Population genetics models of transposable elements

@article{Brookfield2004PopulationGM,
  title={Population genetics models of transposable elements},
  author={John F. Y. Brookfield and Richard Badge},
  journal={Genetica},
  year={2004},
  volume={100},
  pages={281-294}
}
The control of transposable element copy number is of considerable theoretical and empirical interest. Under simple models, copy numbers may increase without limit. Mechanisms that can prevent such an increase include those in which the effect of selection increases with copy number, those in which the rate of transposition decreases with copy number, and those where unlimited increase in copy number is prevented by the consequences of functional heterogeneity in the transposable element family… 
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It is proposed that the size of pi RNA clusters may be at an equilibrium between evolutionary forces that act to expand and contract piRNA clusters, which is possibly even threatening the persistence of some populations.
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