Allelic polymorphism in MHC class IIB in four populations of Atlantic salmon (Salmo salar)
We sequenced exon 2 of the MHC class II B gene in Atlantic salmon from the Baltic Sea and identified 17 different exon 2 alleles among 22 different restriction fragment length polymorphism haplotypes. The sequences differed at between I and 34 bases. Two different tests were used to estimate the imp...
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ftulundlup:oai:lup.lub.lu.se:a1d888fe-cd98-426d-a067-eabb47c1698d 2023-05-15T15:30:59+02:00 Allelic polymorphism in MHC class IIB in four populations of Atlantic salmon (Salmo salar) Langefors, Åsa Lohm, Jakob von Schantz, Torbjörn 2001 https://lup.lub.lu.se/record/145744 https://doi.org/10.1007/s002510100329 eng eng Springer https://lup.lub.lu.se/record/145744 http://dx.doi.org/10.1007/s002510100329 scopus:0034911730 Immunogenetics; 53(4), pp 329-336 (2001) ISSN: 1432-1211 Biological Sciences Ecology contributiontojournal/article info:eu-repo/semantics/article text 2001 ftulundlup https://doi.org/10.1007/s002510100329 2023-02-01T23:28:26Z We sequenced exon 2 of the MHC class II B gene in Atlantic salmon from the Baltic Sea and identified 17 different exon 2 alleles among 22 different restriction fragment length polymorphism haplotypes. The sequences differed at between I and 34 bases. Two different tests were used to estimate the importance of recombination in the generation of new alleles. Recombination events appear to have occurred between three and nine times. Only two pairs of sequences differed by less than five nucleotides', minimizing the importance of point mutations for generating new alleles. Phylogenetic analysis showed that sequences did not cluster according to populations, and genetic distances between populations were small compared to those obtained by allele frequency data. These results, together with the similarity found between exon 2 sequences from Baltic salmon and Norwegian salmon, indicate that all of the identified alleles were present in the ancient salmon population colonizing the Baltic rivers after the last glaciation. Article in Journal/Newspaper Atlantic salmon Salmo salar Lund University Publications (LUP) Immunogenetics 53 4 329 336 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Biological Sciences Ecology |
spellingShingle |
Biological Sciences Ecology Langefors, Åsa Lohm, Jakob von Schantz, Torbjörn Allelic polymorphism in MHC class IIB in four populations of Atlantic salmon (Salmo salar) |
topic_facet |
Biological Sciences Ecology |
description |
We sequenced exon 2 of the MHC class II B gene in Atlantic salmon from the Baltic Sea and identified 17 different exon 2 alleles among 22 different restriction fragment length polymorphism haplotypes. The sequences differed at between I and 34 bases. Two different tests were used to estimate the importance of recombination in the generation of new alleles. Recombination events appear to have occurred between three and nine times. Only two pairs of sequences differed by less than five nucleotides', minimizing the importance of point mutations for generating new alleles. Phylogenetic analysis showed that sequences did not cluster according to populations, and genetic distances between populations were small compared to those obtained by allele frequency data. These results, together with the similarity found between exon 2 sequences from Baltic salmon and Norwegian salmon, indicate that all of the identified alleles were present in the ancient salmon population colonizing the Baltic rivers after the last glaciation. |
format |
Article in Journal/Newspaper |
author |
Langefors, Åsa Lohm, Jakob von Schantz, Torbjörn |
author_facet |
Langefors, Åsa Lohm, Jakob von Schantz, Torbjörn |
author_sort |
Langefors, Åsa |
title |
Allelic polymorphism in MHC class IIB in four populations of Atlantic salmon (Salmo salar) |
title_short |
Allelic polymorphism in MHC class IIB in four populations of Atlantic salmon (Salmo salar) |
title_full |
Allelic polymorphism in MHC class IIB in four populations of Atlantic salmon (Salmo salar) |
title_fullStr |
Allelic polymorphism in MHC class IIB in four populations of Atlantic salmon (Salmo salar) |
title_full_unstemmed |
Allelic polymorphism in MHC class IIB in four populations of Atlantic salmon (Salmo salar) |
title_sort |
allelic polymorphism in mhc class iib in four populations of atlantic salmon (salmo salar) |
publisher |
Springer |
publishDate |
2001 |
url |
https://lup.lub.lu.se/record/145744 https://doi.org/10.1007/s002510100329 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Immunogenetics; 53(4), pp 329-336 (2001) ISSN: 1432-1211 |
op_relation |
https://lup.lub.lu.se/record/145744 http://dx.doi.org/10.1007/s002510100329 scopus:0034911730 |
op_doi |
https://doi.org/10.1007/s002510100329 |
container_title |
Immunogenetics |
container_volume |
53 |
container_issue |
4 |
container_start_page |
329 |
op_container_end_page |
336 |
_version_ |
1766361461362262016 |