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The Influence Of Dispersal And Diet Breadth On Patterns Of Genetic Isolation By Distance In Phytophagous Insects, Merrill A. Peterson
The Influence Of Dispersal And Diet Breadth On Patterns Of Genetic Isolation By Distance In Phytophagous Insects, Merrill A. Peterson
Biology Faculty and Staff Publications
To determine the effects of dispersal ability and diet breadth on population-genetic structure, we reviewed the allozyme literature and estimated genetic isolation by distance (IBD) for 43 species/host races of phytophagous insects. Subsequently, we tested two opposing hypotheses regarding the influence of dispersal ability on IBD: that IBD slopes do not vary with mobility, but that intercepts increase with mobility, and, alternatively, that IBD slopes vary with dispersal ability. We found that from tens of kilometers to more than 1,000 km, IBD is weak in sedentary and highly mobile species but pronounced in moderately mobile species. We attribute the weak …