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Journal of Insect Conservation

, Volume 7, Issue 4, pp 207–213 | Cite as

Pattern of genetic differentiation in two Isophya species (Orthoptera: Tettigonoidea) in north-east Hungary

  • Katalin PecsenyeEmail author
  • Edit Vadkerti
  • Zoltán Varga
Article

Abstract

Allozyme polymorphism was studied in two populations of Isophya kraussi and Isophya stysi. Both species are flightless and have low dispersal ability. As a consequence, we expected high level of genetic differentiation among their local populations. Samples were collected in three regions of Hungary. Enzyme polymorphism was investigated at 10 loci (Aldox, Est, Got, αGpdh, Hk, Idh, Mdh, Me, Pgi and Pgm) in both species. High levels of polymorphism were detected in all samples. αGpdh proved to be diagnostic as there were no common alleles in the two species. At four further loci (Got, Hk, Mdh and Me), the two species had one common allele together with one or more differentiating alleles. We detected high FIT values implying a high level of genetic variation. The positive FIS values suggested a tendency of heterozygote deficiency in both species. The highly significant overall FST values indicated clear genetic differentiation among the local populations. Thus our results confirmed the taxonomic status of these two species. The dendrogram constructed on the basis of Nei's genetic distances and the results of the PCA analyses fully confirmed those obtained by F-statistics.

Enzyme polymorphism Genetic differentiation Hungary Isophya 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Katalin Pecsenye
    • 1
    Email author
  • Edit Vadkerti
    • 2
  • Zoltán Varga
    • 1
  1. 1.Department of Evolutionary Zoology and Human BiologyUniversity of DebrecenUSA
  2. 2.Department of Zootaxonomy and SynzoologyInstitute of Biology, University of PécsUSA

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