Comparing microsatellite variation in north‐east Atlantic cod ( Gadus morhua L.) to genetic structuring as revealed by the pantophysin ( Pan I) locus
Variation at seven microsatellite loci was compared with variation observed at Pan I, a single copy nuclear DNA gene coding for pantophysin, in 14 samples of Atlantic cod ( Gadus morhua ) stretching from Spitsbergen to the North Sea. Population structuring indicated by the two types of markers was c...
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crwiley:10.1111/j.1095-8649.2007.01456.x 2024-06-23T07:48:57+00:00 Comparing microsatellite variation in north‐east Atlantic cod ( Gadus morhua L.) to genetic structuring as revealed by the pantophysin ( Pan I) locus Skarstein, T. H. Westgaard, J.‐I. Fevolden, S.‐E. 2007 http://dx.doi.org/10.1111/j.1095-8649.2007.01456.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2007.01456.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2007.01456.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 70, issue sc, page 271-290 ISSN 0022-1112 1095-8649 journal-article 2007 crwiley https://doi.org/10.1111/j.1095-8649.2007.01456.x 2024-06-13T04:21:26Z Variation at seven microsatellite loci was compared with variation observed at Pan I, a single copy nuclear DNA gene coding for pantophysin, in 14 samples of Atlantic cod ( Gadus morhua ) stretching from Spitsbergen to the North Sea. Population structuring indicated by the two types of markers was concordant and in agreement with the traditional grouping of cod in the study area into three main populations: north‐east Arctic cod (NEAC), Norwegian coastal cod (NCC) and North Sea cod (NSC). Microsatellites, however, revealed genetic heterogeneity not only within NCC, as did Pan I, but also within NEAC and NSC, which appeared to be homogenous when analysed for Pan I. Moreover, microsatellites displayed lower levels of differentiation than Pan I between NEAC and two other groups. Differences in the magnitude of differentiation for the two types of markers may be attributable to higher levels of polymorphism and alleged selective neutrality of microsatellites. Isolation by distance was clearly apparent for microsatellites but was less evident for Pan I, indicating that environmentally induced selection appears to shape the patterns of genetic differentiation for this marker. Even though the population structure of north‐east Atlantic cod, as revealed by microsatellites and Pan I, appears to be maintained largely by restricted gene flow, selection acting on a recent historical time scale probably contributes to the observed geographic pattern of Pan I frequencies. Article in Journal/Newspaper Arctic cod Arctic atlantic cod Gadus morhua North East Atlantic Spitsbergen Wiley Online Library Arctic Journal of Fish Biology 70 sc 271 290 |
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crwiley |
language |
English |
description |
Variation at seven microsatellite loci was compared with variation observed at Pan I, a single copy nuclear DNA gene coding for pantophysin, in 14 samples of Atlantic cod ( Gadus morhua ) stretching from Spitsbergen to the North Sea. Population structuring indicated by the two types of markers was concordant and in agreement with the traditional grouping of cod in the study area into three main populations: north‐east Arctic cod (NEAC), Norwegian coastal cod (NCC) and North Sea cod (NSC). Microsatellites, however, revealed genetic heterogeneity not only within NCC, as did Pan I, but also within NEAC and NSC, which appeared to be homogenous when analysed for Pan I. Moreover, microsatellites displayed lower levels of differentiation than Pan I between NEAC and two other groups. Differences in the magnitude of differentiation for the two types of markers may be attributable to higher levels of polymorphism and alleged selective neutrality of microsatellites. Isolation by distance was clearly apparent for microsatellites but was less evident for Pan I, indicating that environmentally induced selection appears to shape the patterns of genetic differentiation for this marker. Even though the population structure of north‐east Atlantic cod, as revealed by microsatellites and Pan I, appears to be maintained largely by restricted gene flow, selection acting on a recent historical time scale probably contributes to the observed geographic pattern of Pan I frequencies. |
format |
Article in Journal/Newspaper |
author |
Skarstein, T. H. Westgaard, J.‐I. Fevolden, S.‐E. |
spellingShingle |
Skarstein, T. H. Westgaard, J.‐I. Fevolden, S.‐E. Comparing microsatellite variation in north‐east Atlantic cod ( Gadus morhua L.) to genetic structuring as revealed by the pantophysin ( Pan I) locus |
author_facet |
Skarstein, T. H. Westgaard, J.‐I. Fevolden, S.‐E. |
author_sort |
Skarstein, T. H. |
title |
Comparing microsatellite variation in north‐east Atlantic cod ( Gadus morhua L.) to genetic structuring as revealed by the pantophysin ( Pan I) locus |
title_short |
Comparing microsatellite variation in north‐east Atlantic cod ( Gadus morhua L.) to genetic structuring as revealed by the pantophysin ( Pan I) locus |
title_full |
Comparing microsatellite variation in north‐east Atlantic cod ( Gadus morhua L.) to genetic structuring as revealed by the pantophysin ( Pan I) locus |
title_fullStr |
Comparing microsatellite variation in north‐east Atlantic cod ( Gadus morhua L.) to genetic structuring as revealed by the pantophysin ( Pan I) locus |
title_full_unstemmed |
Comparing microsatellite variation in north‐east Atlantic cod ( Gadus morhua L.) to genetic structuring as revealed by the pantophysin ( Pan I) locus |
title_sort |
comparing microsatellite variation in north‐east atlantic cod ( gadus morhua l.) to genetic structuring as revealed by the pantophysin ( pan i) locus |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1111/j.1095-8649.2007.01456.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2007.01456.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2007.01456.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic cod Arctic atlantic cod Gadus morhua North East Atlantic Spitsbergen |
genre_facet |
Arctic cod Arctic atlantic cod Gadus morhua North East Atlantic Spitsbergen |
op_source |
Journal of Fish Biology volume 70, issue sc, page 271-290 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.2007.01456.x |
container_title |
Journal of Fish Biology |
container_volume |
70 |
container_issue |
sc |
container_start_page |
271 |
op_container_end_page |
290 |
_version_ |
1802639253025325056 |