Dying on the way: The influence of migrational mortality on neutral models of spatial variation

摘要: Migrational mortality is introduced into the classical Malecot model for migration, mutation, and random genetic drift. To assess influence of mortality, its effect on backward migration rates probabilities identity in allelic state are studied. Perhaps surprisingly, some former may increase, but as intuitive, their sum always decreases. As expected, island model, does not change pattern, it decreases rate. Furthermore, expected heterozygosity, increases diversity differentiation. The circular habitat unbounded, linear stepping-stone also illustrate general results. Arbitrary analyzed. If sufficiently weak, then diminishes every rate; heterozygosity similarity between demes. In strong-migration limit, raise or lower probability state. unexpectedly, under mild reasonable biological assumptions, alter diffusion limit identity.