Genetically monomorphic brown trout (Salmo trutta L.) populations, as revealed by mitochondrial DNA, multilocus and single-locus minisatellite (VNTR) analyses

Paulo A. Prodöhl, Andrew F. Walker, Rosaleen Hynes, John B. Taggart, Andrew Ferguson*

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Normally, populations of brown trout are genetically highly variable. Two adjacent populations from north-west Scotland, which had previously been found to be monomorphic for 46 protein-coding loci, were studied by higher resolution techniques. Analyses of mitochondrial DNA, multilocus DNA fingerprints and eight specific minisatellite loci revealed no genetic variation among individuals or genetic differences between the two populations. Continual low effective population sizes or severe repeated bottlenecks, as a result of low or variable recruitment, probably explain the atypical absence of genetic variation in these trout populations. Growth data do not provide any evidence of a reduction in fitness in trout from these populations.

Original languageEnglish
Pages (from-to)208-213
Number of pages6
JournalHeredity
Volume79
Issue number2
DOIs
Publication statusPublished - 01 Jan 1997

Keywords

  • Brown trout
  • Inbreeding depression
  • Minisatellite DNA
  • Mitochondrial DNA
  • Monomorphism

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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