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Summary: Evolutionary dynamics and population biology of a polymorphic
insect
E. I. SVENSSON & J. ABBOTT
Section for Animal Ecology, Lund University, Lund, Sweden
Introduction
How selection and other forces such as genetic drift,
mutation and migration mould patterns of genetic
variation in natural populations is a central topic in
population genetics and evolutionary biology. These
questions attracted considerable interest among early
theoretical population geneticists (Fisher, 1930; Wright,
1931; Lewontin, 1974) and they continue to be in focus
of current evolutionary studies (Lynch & Walsh, 1998).
The fitness consequences and extent of adaptive genetic
variation in natural populations is of much interest to
ecologists and evolutionary biologists, which is exempli-
fied by many recent long-term field studies and
reciprocal transplant experiments in different taxa
(Mousseau et al., 2000). Several recent empirical studies
have demonstrated rapid evolutionary change and the
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