On Wright's mechanism for intergroup selection.

  title={On Wright's mechanism for intergroup selection.},
  author={Henry C. Harpending and Alan R. Rogers},
  journal={Journal of theoretical biology},
  volume={127 1},
A haploid model of Wright's (1945) intergroup selection is described. Several approximate analyses as well as Monte Carlo simulation show that Wright's mechanism leads to powerful selection for group advantageous traits in the face of strong local selection against them. Intergroup selection is favored by small local subpopulation size and by high, not low, rates of immigration into local groups, although the dependence on migration rate is not strong. These results and others cast doubt on the… CONTINUE READING

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