Low but significant genetic differentiation underlies biologically meaningful phenotypic divergence in a large Atlantic salmon population
Despite decades of research assessing the genetic structure of natural populations, the biological meaning of low yet significant genetic divergence often remains unclear due to a lack of associated phenotypic and ecological information. At the same time, structured populations with low genetic dive...
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ftluke:oai:jukuri.luke.fi:10024/531584 2023-10-09T21:49:56+02:00 Low but significant genetic differentiation underlies biologically meaningful phenotypic divergence in a large Atlantic salmon population Aykanat, Tutku Johnston, Susan E. Orell, Panu Niemelä, Eero Erkinaro, Jaakko Primmer, Craig R. Division of Genetics and Physiology, Department of Biology, University of Turku Institute of Evolutionary Biology, University of Edinburgh Luke / Luonnonvarat ja biotuotanto / Elinympäristö ja ekologia / Akvaattinen ekologia (100303) Luke / Luonnonvarat ja biotuotanto / Elinympäristö ja ekologia / Rakennetut vesistöt (100307) Luke / Luonnonvarat ja biotuotanto / Kala-, riista- ja metsäseurannat / Meri- ja vaelluskalaseurannat (100501) 100303 100307 100501 Sekä painettu, että verkkojulkaisu 5158-5174 false http://jukuri.luke.fi/handle/10024/531584 eng eng Blackwell Oxford gb Molecular ecology 10.1111/mec.13383 0962-1083 20 24 http://jukuri.luke.fi/handle/10024/531584 1365-294X age at maturity cryptic population structure growth life history variation population genetics single nucleotide polymorphisms fi=A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä|sv=A1 Originalartikel i en vetenskaplig tidskrift|en=A1 Journal article (refereed), original research| 0 Ei Open access -julkaisu ftluke 2023-09-12T20:24:17Z Despite decades of research assessing the genetic structure of natural populations, the biological meaning of low yet significant genetic divergence often remains unclear due to a lack of associated phenotypic and ecological information. At the same time, structured populations with low genetic divergence and overlapping boundaries can potentially provide excellent models to study adaptation and reproductive isolation in cases where high-resolution genetic markers and relevant phenotypic and life history information are available. Here, we combined single nucleotide polymorphism (SNP)-based population inference with extensive phenotypic and life history data to identify potential biological mechanisms driving fine-scale subpopulation differentiation in Atlantic salmon (Salmo salar) from the Teno River, a major salmon river in Europe. Two sympatrically occurring subpopulations had low but significant genetic differentiation (F-ST=0.018) and displayed marked differences in the distribution of life history strategies, including variation in juvenile growth rate, age at maturity and size within age classes. Large, late-maturing individuals were virtually absent from one of the two subpopulations, and there were significant differences in juvenile growth rates and size at age after oceanic migration between individuals in the respective subpopulations. Our findings suggest that different evolutionary processes affect each subpopulation and that hybridization and subsequent selection may maintain low genetic differentiation without hindering adaptive divergence. 2015 Article in Journal/Newspaper Atlantic salmon Salmo salar Natural Resources Institute Finland: Jukuri Teno ENVELOPE(25.690,25.690,68.925,68.925) |
institution |
Open Polar |
collection |
Natural Resources Institute Finland: Jukuri |
op_collection_id |
ftluke |
language |
English |
topic |
age at maturity cryptic population structure growth life history variation population genetics single nucleotide polymorphisms |
spellingShingle |
age at maturity cryptic population structure growth life history variation population genetics single nucleotide polymorphisms Aykanat, Tutku Johnston, Susan E. Orell, Panu Niemelä, Eero Erkinaro, Jaakko Primmer, Craig R. Low but significant genetic differentiation underlies biologically meaningful phenotypic divergence in a large Atlantic salmon population |
topic_facet |
age at maturity cryptic population structure growth life history variation population genetics single nucleotide polymorphisms |
description |
Despite decades of research assessing the genetic structure of natural populations, the biological meaning of low yet significant genetic divergence often remains unclear due to a lack of associated phenotypic and ecological information. At the same time, structured populations with low genetic divergence and overlapping boundaries can potentially provide excellent models to study adaptation and reproductive isolation in cases where high-resolution genetic markers and relevant phenotypic and life history information are available. Here, we combined single nucleotide polymorphism (SNP)-based population inference with extensive phenotypic and life history data to identify potential biological mechanisms driving fine-scale subpopulation differentiation in Atlantic salmon (Salmo salar) from the Teno River, a major salmon river in Europe. Two sympatrically occurring subpopulations had low but significant genetic differentiation (F-ST=0.018) and displayed marked differences in the distribution of life history strategies, including variation in juvenile growth rate, age at maturity and size within age classes. Large, late-maturing individuals were virtually absent from one of the two subpopulations, and there were significant differences in juvenile growth rates and size at age after oceanic migration between individuals in the respective subpopulations. Our findings suggest that different evolutionary processes affect each subpopulation and that hybridization and subsequent selection may maintain low genetic differentiation without hindering adaptive divergence. 2015 |
author2 |
Division of Genetics and Physiology, Department of Biology, University of Turku Institute of Evolutionary Biology, University of Edinburgh Luke / Luonnonvarat ja biotuotanto / Elinympäristö ja ekologia / Akvaattinen ekologia (100303) Luke / Luonnonvarat ja biotuotanto / Elinympäristö ja ekologia / Rakennetut vesistöt (100307) Luke / Luonnonvarat ja biotuotanto / Kala-, riista- ja metsäseurannat / Meri- ja vaelluskalaseurannat (100501) 100303 100307 100501 |
format |
Article in Journal/Newspaper |
author |
Aykanat, Tutku Johnston, Susan E. Orell, Panu Niemelä, Eero Erkinaro, Jaakko Primmer, Craig R. |
author_facet |
Aykanat, Tutku Johnston, Susan E. Orell, Panu Niemelä, Eero Erkinaro, Jaakko Primmer, Craig R. |
author_sort |
Aykanat, Tutku |
title |
Low but significant genetic differentiation underlies biologically meaningful phenotypic divergence in a large Atlantic salmon population |
title_short |
Low but significant genetic differentiation underlies biologically meaningful phenotypic divergence in a large Atlantic salmon population |
title_full |
Low but significant genetic differentiation underlies biologically meaningful phenotypic divergence in a large Atlantic salmon population |
title_fullStr |
Low but significant genetic differentiation underlies biologically meaningful phenotypic divergence in a large Atlantic salmon population |
title_full_unstemmed |
Low but significant genetic differentiation underlies biologically meaningful phenotypic divergence in a large Atlantic salmon population |
title_sort |
low but significant genetic differentiation underlies biologically meaningful phenotypic divergence in a large atlantic salmon population |
publisher |
Blackwell |
url |
http://jukuri.luke.fi/handle/10024/531584 |
long_lat |
ENVELOPE(25.690,25.690,68.925,68.925) |
geographic |
Teno |
geographic_facet |
Teno |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
Molecular ecology 10.1111/mec.13383 0962-1083 20 24 http://jukuri.luke.fi/handle/10024/531584 1365-294X |
_version_ |
1779312990422564864 |