Gene Flow and Divergence under Disruptive Selection

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Science  29 Apr 1960:
Vol. 131, Issue 3409, pp. 1311-1312
DOI: 10.1126/science.131.3409.1311


Two halves of a population exposed to selection in opposing directions can diverge despite gene flow of the same amount as is given by random mating. Divergence was as great as it is with complete isolation. Isolation, therefore, is not a prerequisite of divergence under divergent selection pressures.