Molecular genetic examination of the polymorphic Arctic charr Salvelinus alpinus of Thingvallavatn, Iceland
Abstract Thingvallavatn, Iceland contains two sympatric morphotypes (benthic and limnetic) of Arctic charr Salvelinus alpinus . Each morphotype is composed of two morphs and these differ markedly in ecology, behaviour and life history. We used molecular genetic approaches to test whether (i) genetic...
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crwiley:10.1111/j.1365-294x.1996.tb00372.x 2024-06-02T08:00:04+00:00 Molecular genetic examination of the polymorphic Arctic charr Salvelinus alpinus of Thingvallavatn, Iceland VOLPE, J. P. FERGUSON, M. M. 1996 http://dx.doi.org/10.1111/j.1365-294x.1996.tb00372.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.1996.tb00372.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.1996.tb00372.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Molecular Ecology volume 5, issue 6, page 763-772 ISSN 0962-1083 1365-294X journal-article 1996 crwiley https://doi.org/10.1111/j.1365-294x.1996.tb00372.x 2024-05-03T11:18:35Z Abstract Thingvallavatn, Iceland contains two sympatric morphotypes (benthic and limnetic) of Arctic charr Salvelinus alpinus . Each morphotype is composed of two morphs and these differ markedly in ecology, behaviour and life history. We used molecular genetic approaches to test whether (i) genetic heterogeneity exists among morphs and (ii) if morphs arose in allopatry and came into secondary contact or arose sympatrically within the lake through genetic segregation and/or phenotypic plasticity. Direct sequencing of 275 bp of the mitochondrial DNA (mtDNA) control region, mtDNA restriction fragment length polymorphisms and single locus minisatellite analyses detected insufficient variation to test our hypotheses. Analysis of multilocus minisatellite band sharing detected no significant differences between morphs within the same morphotype. However, significant differences among morphs belonging to different morphotypes suggest some genetic heterogeneity in Thingvallavatn charr. Limnetic charr from Thingvallavatn were more similar to sympatric benthic charr than to allopatric limnetics from two other Icelandic lakes. This suggests that the Thingvallavatn morphs arose sympatrically within the lake rather than in allopatry followed by secondary contact. Article in Journal/Newspaper Arctic charr Arctic Iceland Salvelinus alpinus Wiley Online Library Arctic Molecular Ecology 5 6 763 772 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Thingvallavatn, Iceland contains two sympatric morphotypes (benthic and limnetic) of Arctic charr Salvelinus alpinus . Each morphotype is composed of two morphs and these differ markedly in ecology, behaviour and life history. We used molecular genetic approaches to test whether (i) genetic heterogeneity exists among morphs and (ii) if morphs arose in allopatry and came into secondary contact or arose sympatrically within the lake through genetic segregation and/or phenotypic plasticity. Direct sequencing of 275 bp of the mitochondrial DNA (mtDNA) control region, mtDNA restriction fragment length polymorphisms and single locus minisatellite analyses detected insufficient variation to test our hypotheses. Analysis of multilocus minisatellite band sharing detected no significant differences between morphs within the same morphotype. However, significant differences among morphs belonging to different morphotypes suggest some genetic heterogeneity in Thingvallavatn charr. Limnetic charr from Thingvallavatn were more similar to sympatric benthic charr than to allopatric limnetics from two other Icelandic lakes. This suggests that the Thingvallavatn morphs arose sympatrically within the lake rather than in allopatry followed by secondary contact. |
format |
Article in Journal/Newspaper |
author |
VOLPE, J. P. FERGUSON, M. M. |
spellingShingle |
VOLPE, J. P. FERGUSON, M. M. Molecular genetic examination of the polymorphic Arctic charr Salvelinus alpinus of Thingvallavatn, Iceland |
author_facet |
VOLPE, J. P. FERGUSON, M. M. |
author_sort |
VOLPE, J. P. |
title |
Molecular genetic examination of the polymorphic Arctic charr Salvelinus alpinus of Thingvallavatn, Iceland |
title_short |
Molecular genetic examination of the polymorphic Arctic charr Salvelinus alpinus of Thingvallavatn, Iceland |
title_full |
Molecular genetic examination of the polymorphic Arctic charr Salvelinus alpinus of Thingvallavatn, Iceland |
title_fullStr |
Molecular genetic examination of the polymorphic Arctic charr Salvelinus alpinus of Thingvallavatn, Iceland |
title_full_unstemmed |
Molecular genetic examination of the polymorphic Arctic charr Salvelinus alpinus of Thingvallavatn, Iceland |
title_sort |
molecular genetic examination of the polymorphic arctic charr salvelinus alpinus of thingvallavatn, iceland |
publisher |
Wiley |
publishDate |
1996 |
url |
http://dx.doi.org/10.1111/j.1365-294x.1996.tb00372.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.1996.tb00372.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.1996.tb00372.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Iceland Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Iceland Salvelinus alpinus |
op_source |
Molecular Ecology volume 5, issue 6, page 763-772 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-294x.1996.tb00372.x |
container_title |
Molecular Ecology |
container_volume |
5 |
container_issue |
6 |
container_start_page |
763 |
op_container_end_page |
772 |
_version_ |
1800744091544190976 |