EVIDENCE FOR HISTORICAL INTROGRESSION ALONG A CONTACT ZONE BETWEEN TWO SPECIES OF CHAR (PISCES: SALMONIDAE) IN NORTHWESTERN NORTH AMERICA
Phylogeographic analyses can yield valuable insights into the geographic and historical contexts of contact and hybridization between taxa. Two species of char (Salmonidae), Dolly Varden (Salvelinus malma) and bull trout (S. confluentus) have largely parapatric distributions in watersheds of northwe...
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The Society for the Study of Evolution
2002
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ftbioone:10.1554/0014-3820(2002)056[1021:EFHIAA]2.0.CO;2 2023-07-30T04:04:14+02:00 EVIDENCE FOR HISTORICAL INTROGRESSION ALONG A CONTACT ZONE BETWEEN TWO SPECIES OF CHAR (PISCES: SALMONIDAE) IN NORTHWESTERN NORTH AMERICA Z. Redenbach Eric B. Taylor Z. Redenbach Eric B. Taylor world 2002-05-01 text/HTML https://doi.org/10.1554/0014-3820(2002)056[1021:EFHIAA]2.0.CO;2 en eng The Society for the Study of Evolution doi:10.1554/0014-3820(2002)056[1021:EFHIAA]2.0.CO;2 All rights reserved. https://doi.org/10.1554/0014-3820(2002)056[1021:EFHIAA]2.0.CO;2 Text 2002 ftbioone https://doi.org/10.1554/0014-3820(2002)056[1021:EFHIAA]2.0.CO;2 2023-07-09T09:25:45Z Phylogeographic analyses can yield valuable insights into the geographic and historical contexts of contact and hybridization between taxa. Two species of char (Salmonidae), Dolly Varden (Salvelinus malma) and bull trout (S. confluentus) have largely parapatric distributions in watersheds of northwestern North America. They are, however, sympatric in several localities and hybridization and some introgression occurs across a broad area of contact. We conducted a comparative phylogenetic analysis of Dolly Varden and bull trout to gain a historical perspective of hybridization between these species and to test for footprints of historical introgression. We resolved two major Dolly Varden mitochondrial DNA (mtDNA) clades (with 1.4–2.2% sequence divergence between haplotypes) that had different geographical distributions. Clade N is distributed across most of the range of Dolly Varden, from southern British Columbia through to the Kuril Islands in Asia. Clade S had a much more limited distribution, from Washington state, at the southern limit of the Dolly Varden range, to the middle of Vancouver Island. The distribution and inferred ages of the mtDNA clades suggested that Dolly Varden survived the Wisconsinan glaciation in a previously unsuspected refuge south of the ice sheet, and that Dolly Varden and bull trout were probably in continuous contact over most of the last 100,000 years. When bull trout were included in the phylogenetic analysis, however, the mtDNA of neither species was monophyletic: Clade S Dolly Varden clustered within the bull trout mtDNA clade. This pattern was discordant with two nuclear phylogenies produced (growth hormone 2 and rRNA internal transcribed sequence 1), in which Dolly Varden and bull trout were reciprocally monophyletic. This discordance between mtDNA- and nDNA-based phylogenies indicates that historical introgression of bull trout mtDNA into Dolly Varden occurred. Percent sequence divergence within these introgressed Dolly Varden (clade S) was 0.2–0.6%, implying that the ... Text Ice Sheet BioOne Online Journals Varden ENVELOPE(7.656,7.656,62.534,62.534) |
institution |
Open Polar |
collection |
BioOne Online Journals |
op_collection_id |
ftbioone |
language |
English |
description |
Phylogeographic analyses can yield valuable insights into the geographic and historical contexts of contact and hybridization between taxa. Two species of char (Salmonidae), Dolly Varden (Salvelinus malma) and bull trout (S. confluentus) have largely parapatric distributions in watersheds of northwestern North America. They are, however, sympatric in several localities and hybridization and some introgression occurs across a broad area of contact. We conducted a comparative phylogenetic analysis of Dolly Varden and bull trout to gain a historical perspective of hybridization between these species and to test for footprints of historical introgression. We resolved two major Dolly Varden mitochondrial DNA (mtDNA) clades (with 1.4–2.2% sequence divergence between haplotypes) that had different geographical distributions. Clade N is distributed across most of the range of Dolly Varden, from southern British Columbia through to the Kuril Islands in Asia. Clade S had a much more limited distribution, from Washington state, at the southern limit of the Dolly Varden range, to the middle of Vancouver Island. The distribution and inferred ages of the mtDNA clades suggested that Dolly Varden survived the Wisconsinan glaciation in a previously unsuspected refuge south of the ice sheet, and that Dolly Varden and bull trout were probably in continuous contact over most of the last 100,000 years. When bull trout were included in the phylogenetic analysis, however, the mtDNA of neither species was monophyletic: Clade S Dolly Varden clustered within the bull trout mtDNA clade. This pattern was discordant with two nuclear phylogenies produced (growth hormone 2 and rRNA internal transcribed sequence 1), in which Dolly Varden and bull trout were reciprocally monophyletic. This discordance between mtDNA- and nDNA-based phylogenies indicates that historical introgression of bull trout mtDNA into Dolly Varden occurred. Percent sequence divergence within these introgressed Dolly Varden (clade S) was 0.2–0.6%, implying that the ... |
author2 |
Z. Redenbach Eric B. Taylor |
format |
Text |
author |
Z. Redenbach Eric B. Taylor |
spellingShingle |
Z. Redenbach Eric B. Taylor EVIDENCE FOR HISTORICAL INTROGRESSION ALONG A CONTACT ZONE BETWEEN TWO SPECIES OF CHAR (PISCES: SALMONIDAE) IN NORTHWESTERN NORTH AMERICA |
author_facet |
Z. Redenbach Eric B. Taylor |
author_sort |
Z. Redenbach |
title |
EVIDENCE FOR HISTORICAL INTROGRESSION ALONG A CONTACT ZONE BETWEEN TWO SPECIES OF CHAR (PISCES: SALMONIDAE) IN NORTHWESTERN NORTH AMERICA |
title_short |
EVIDENCE FOR HISTORICAL INTROGRESSION ALONG A CONTACT ZONE BETWEEN TWO SPECIES OF CHAR (PISCES: SALMONIDAE) IN NORTHWESTERN NORTH AMERICA |
title_full |
EVIDENCE FOR HISTORICAL INTROGRESSION ALONG A CONTACT ZONE BETWEEN TWO SPECIES OF CHAR (PISCES: SALMONIDAE) IN NORTHWESTERN NORTH AMERICA |
title_fullStr |
EVIDENCE FOR HISTORICAL INTROGRESSION ALONG A CONTACT ZONE BETWEEN TWO SPECIES OF CHAR (PISCES: SALMONIDAE) IN NORTHWESTERN NORTH AMERICA |
title_full_unstemmed |
EVIDENCE FOR HISTORICAL INTROGRESSION ALONG A CONTACT ZONE BETWEEN TWO SPECIES OF CHAR (PISCES: SALMONIDAE) IN NORTHWESTERN NORTH AMERICA |
title_sort |
evidence for historical introgression along a contact zone between two species of char (pisces: salmonidae) in northwestern north america |
publisher |
The Society for the Study of Evolution |
publishDate |
2002 |
url |
https://doi.org/10.1554/0014-3820(2002)056[1021:EFHIAA]2.0.CO;2 |
op_coverage |
world |
long_lat |
ENVELOPE(7.656,7.656,62.534,62.534) |
geographic |
Varden |
geographic_facet |
Varden |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
https://doi.org/10.1554/0014-3820(2002)056[1021:EFHIAA]2.0.CO;2 |
op_relation |
doi:10.1554/0014-3820(2002)056[1021:EFHIAA]2.0.CO;2 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1554/0014-3820(2002)056[1021:EFHIAA]2.0.CO;2 |
_version_ |
1772815517198843904 |