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Genetic investigations on Ips typographus populations in authochthonus and allochthonous areas.

Project Leader
Stauffer Christian, Project Leader
Duration:
01.01.1995-31.12.1997
Type of Research
Applied Research
Project partners
University Sopron, Sopron, Hungary.
Function of the Project Partner: Koordinator
Staff
BOKU Research Units
Institute of Forest Entomology, Forest Pathology and Forest Protection
Funded by
Austrian Development Agency (ADA), Zelinkagasse , 1010 Wien, Austria
Abstract
Final Report by Lakatos: The genetic structure of Ips typographus (L.) populations from autochthonous and allochthonous Picea abies ((L.) Karsten) stands in West-Hungary was investigated using isozyme electrophoresis. 38 % of the investigated loci were polymorphic. As our study showed, the genetic structure of the I. typographus populations was homogenous. Differentiation among populations were estimated using heterozygosity calculations, FST statistics and by the estimation of gene flow. The FST statistics indicates that 1.1% of the variance is due genetic differentiation among populations and 98.9% of the variance is within the population. The inbreeding coefficients (FIS FIT) is significantly higher in the I. typographus populations from allochthonous spruce stands than from autochthonous ones. The estimation of gene flow after Slatkin's graphical method (1978) differed between autochthonous and allochthonous spruce stands. The allochthonous regions of P. abies may be geographical restricted for I. typographus because the diffuse presence of the host plant, which appear also in the genetic structure of the beetle populations. Theory is presented for the genetic process influencing the physiological population structure depending on the beetle migration. The possible role of genetic dissimilarities in the autochthonous and allochthonous stands according the bark beetle outbreaks are discussed.
Keywords
forest protection;
Ips typographus;
Publications

Hösle, P., Führer, E., Stauffer, C. (2000): Molecular and ethological analysis of Ips typographus populations (Coleoptera, Scolytidae)..

In: Hasenauer, H. (Ed.): Proceedings of the International Conference on Forest Ecosystem Restoration. Ecological and Economical Impacts of Restoration Processes in Secondary Coniferous Forests

Stauffer, C. (1999): Ecological genetics of European Ips species..

In: Hayes, J., Raffa, K. (eds.): Proceedings of a workshop on bark beetle genetics: Current status of bark beetle genetic research. 15-19, Madison, WI. Gen. Tech. Rep. PNW-GTR-466, Portland, Oregon, US

Lakatos, F., Stauffer, C., Blecha, R. (1996): Phylogeographical analysis of European Ips typographus (L.) (Col., Scolytidae) populations with special concern on the border zones..

5th International Congress of Systematic and Evolutionary Biology, Budapest

Lakatos, F., Stauffer, C. (1995): Genetic and ecological aspects of scolytid infestations in native and non-autochtonous Picea abies stands..

In: Forests and insects. London

Vorträge
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