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    A one-island selection-migration model is used to study the periodic immigration of a population of fixed allele frequency into a natural population. Density-dependent selection and immigration are the primary factors affecting the demographic genetic change in the island population. With the assumptions of complete dominance (CD) or no dominance (ND) and homozygote superiority in fitness, the existence and location of global attractors are established. analysis of this model provides rudimentary information about the migration of transgenes into a natural population.

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    Selgrade, James F.; Roberds, James H. 2007. Global attractors for a discrete selection model with periodic immigration. Journal of Difference Equations and Applications, Vol. 13(4): 275-287


    natural selection, periodic immigration, complete dominance, no dominance, global attractor

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