Genetic Drift in a Cline |
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| Authors: | Montgomery Slatkin and Takeo Maruyama |
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| Institution: | Department of Biophysics and Theoretical Biology, The University of Chicago, 920 East 58th Street, Chicago, Illinois 60637;National Institute of Genetics, Yata 1,111, Misima, Sizuoka-ken 411, Japan |
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| Abstract: | A model is developed of genetic drift in a cline maintained by spatially varying natural selection and local dispersal of individuals. The model is analyzed by an approximation scheme which is valid for weak selection and small migration rates. The results, which are based on numerical iterations of the approximate equations, are that the cline is less steep than predicted on the basis of the deterministic theory but that for weak selection the correlation between random fluctuations in neighboring colonies is approximately the same as in models of migration and drift in the absence of selection. |
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