Spatial genetic structure in populations of the green oak leaf roller, Tortrix viridana L. (Lepidoptera, Tortricidae) |
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| Authors: | Hilke Schroeder Bernd Degen |
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| Institution: | (1) Federal Research Institute for Rural Areas, Forestry and Fisheries, Institute for Forest Genetics, Johann Heinrich von Thuenen-Institute, Sieker Landstrasse 2, 22927 Grosshansdorf, Germany |
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| Abstract: | The green oak leaf roller (Tortrix viridana L.) is a major pest on oaks. The green oak leaf roller is one reason within a disease complex for the oak decline, and it
leads to defoliation of oaks in spring. In Germany, Quercus robur L. is mainly affected. The partitioning of genetic variation within and among populations of forest pests is linked to their
capacities for migration. And the capacity for migration is the basis for dispersal of the pest species to different host
trees and host populations and, therefore, for further outbreak events. Thus, the within population spatial genetic structure
(SGS) of T. viridana was investigated based on nuclear (AFLP) markers to analyse the dispersal capacity of this insect pest species at a very
small spatial scale. A total of 401 individuals of the green oak leaf roller from four stands in North Rhine-Westphalia (Western
Germany) were examined. In three of four populations, the AFLP markers revealed clearly SGS up to 40 m, which can be explained
by the mating behaviour within this species. |
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| Keywords: | Tortrix viridana AFLP SGS Dispersal behaviour |
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