Isolation over 35 years in a heated biotest basin causes selection on MHC class IIß genes in the European perch (Perca fluviatilis L.)

Björklund, Mats; Aho, Teija; Behrmann-Godel, Jasminca

Isolation over 35 years in a heated biotest basin causes selection on MHC class IIß genes in the European perch (Perca fluviatilis L.)

Dateien

Bjoerklund_0-284573.pdfGröße: 1022.42 KBDownloads: 246

Datum

2015

Autor:innen

Björklund, Mats

Aho, Teija

Behrmann-Godel, Jasminca

Open Access-Veröffentlichung

Open Access Gold

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Ecology and Evolution. 2015, 5(7), pp. 1440-1455. eISSN 2045-7758. Available under: doi: 10.1002/ece3.1426

Zusammenfassung

Genes that play key roles in host immunity such as the major histocompatibility complex (MHC) in vertebrates are expected to be major targets of selection. It is well known that environmental conditions can have an effect on host–parasite interactions and may thus influence the selection on MHC. We analyzed MHC class IIß variability over 35 years in a population of perch (Perca fluviatilis) from the Baltic Sea that was split into two populations separated from each other. One population was subjected to heating from cooling water of a nuclear power plant and was isolated from the surrounding environment in an artificial lake, while the other population was not subjected to any change in water temperature (control). The isolated population experienced a change of the allelic composition and a decrease in allelic richness of MHC genes compared to the control population. The two most common MHC alleles showed cyclic patterns indicating ongoing parasite–host coevolution in both populations, but the alleles that showed a cyclic behavior differed between the two populations. No such patterns were observed at alleles from nine microsatellite loci, and no genetic differentiation was found between populations. We found no indications for a genetic bottleneck in the isolated population during the 35 years. Additionally, differences in parasitism of the current perch populations suggest that a change of the parasite communities has occurred over the isolation period, although the evidence in form of in-depth knowledge of the change of the parasite community over time is lacking. Our results are consistent with the hypothesis of a selective sweep imposed by a change in the parasite community.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Zitieren

ISO 690

BJÖRKLUND, Mats, Teija AHO, Jasminca BEHRMANN-GODEL, 2015. Isolation over 35 years in a heated biotest basin causes selection on MHC class IIß genes in the European perch (Perca fluviatilis L.). In: Ecology and Evolution. 2015, 5(7), pp. 1440-1455. eISSN 2045-7758. Available under: doi: 10.1002/ece3.1426

BibTex

@article{Bjorklund2015Isola-30795,
  year={2015},
  doi={10.1002/ece3.1426},
  title={Isolation over 35 years in a heated biotest basin causes selection on MHC class IIß genes in the European perch (Perca fluviatilis L.)},
  number={7},
  volume={5},
  journal={Ecology and Evolution},
  pages={1440--1455},
  author={Björklund, Mats and Aho, Teija and Behrmann-Godel, Jasminca}
}

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