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Whole-genome resequencing confirms reproductive isolation between sympatric demes of brown trout (Salmo trutta) detected with allozymes.
Saha, Atal; Andersson, Anastasia; Kurland, Sara; Keehnen, Naomi L P; Kutschera, Verena E; Hössjer, Ola; Ekman, Diana; Karlsson, Sten; Kardos, Marty; Ståhl, Gunnar; Allendorf, Fred W; Ryman, Nils; Laikre, Linda.
Afiliación
  • Saha A; Division of Population Genetics, Department of Zoology, Stockholm University, Stockholm, Sweden.
  • Andersson A; Division of Population Genetics, Department of Zoology, Stockholm University, Stockholm, Sweden.
  • Kurland S; Division of Population Genetics, Department of Zoology, Stockholm University, Stockholm, Sweden.
  • Keehnen NLP; Division of Population Genetics, Department of Zoology, Stockholm University, Stockholm, Sweden.
  • Kutschera VE; Department of Biochemistry and Biophysics, National Bioinformatics Infrastructure Sweden, Science for Life Laboratory, Stockholm University, Solna, Sweden.
  • Hössjer O; Department of Mathematics, Stockholm University, Stockholm, Sweden.
  • Ekman D; Department of Biochemistry and Biophysics, National Bioinformatics Infrastructure Sweden, Science for Life Laboratory, Stockholm University, Solna, Sweden.
  • Karlsson S; Norwegian Institute for Nature Research (NINA), Trondheim, Norway.
  • Kardos M; Flathead Lake Biological Station, University of Montana, Montana, USA.
  • Ståhl G; National Marine Fisheries Service, Northwest Fisheries Science Center, National Oceanic and Atmospheric Administration, Seattle, Washington, USA.
  • Allendorf FW; Biolab, Skärholmen, Sweden.
  • Ryman N; Division of Biological Sciences, University of Montana, Missoula, Montana, USA.
  • Laikre L; Division of Population Genetics, Department of Zoology, Stockholm University, Stockholm, Sweden.
Mol Ecol ; 31(2): 498-511, 2022 01.
Article en En | MEDLINE | ID: mdl-34699656
The sympatric existence of genetically distinguishable populations of the same species remains a puzzle in ecology. Coexisting salmonid fish populations are known from over 100 freshwater lakes. Most studies of sympatric populations have used limited numbers of genetic markers making it unclear if genetic divergence involves certain parts of the genome. We returned to the first reported case of salmonid sympatry, initially detected through contrasting homozygosity at a single allozyme locus (coding for lactate dehydrogenase A) in brown trout in the small Lakes Bunnersjöarna, Sweden. First, we verified the existence of the two coexisting demes using a 96-SNP fluidigm array. We then applied whole-genome resequencing of pooled DNA to explore genome-wide diversity within and between these demes; nucleotide diversity was higher in deme I than in deme II. Strong genetic divergence is observed with genome-wide FST  ≈ 0.2. Compared with data from populations of similar small lakes, this divergence is of similar magnitude as that between reproductively isolated populations. Individual whole-genome resequencing of two individuals per deme suggests higher inbreeding in deme II versus deme I, indicating different degree of isolation. We located two gene-copies for LDH-A and found divergence between demes in a regulatory section of one of these genes. However, we did not find a perfect fit between the sequence data and previous allozyme results, and this will require further research. Our data demonstrates genome-wide divergence governed mostly by genetic drift but also by diversifying selection in coexisting populations. This type of hidden biodiversity needs consideration in conservation management.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Aislamiento Reproductivo / Simpatría Límite: Animals / Humans Idioma: En Revista: Mol Ecol Asunto de la revista: BIOLOGIA MOLECULAR / SAUDE AMBIENTAL Año: 2022 Tipo del documento: Article País de afiliación: Suecia Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Aislamiento Reproductivo / Simpatría Límite: Animals / Humans Idioma: En Revista: Mol Ecol Asunto de la revista: BIOLOGIA MOLECULAR / SAUDE AMBIENTAL Año: 2022 Tipo del documento: Article País de afiliación: Suecia Pais de publicación: Reino Unido