Mitochondrial DNA Variation and Introgression in Siberian Taimen Hucho taimen
Siberian taimen Hucho taimen is the largest representative of the family Salmonidae inhabiting rivers of northern Eurasia. The species is under intensive aquaculture activity. To monitor natural taimen populations we have sequenced a portion (8,141 bp) of the mitochondrial (mt) genome in 28 specimen...
Published in: | PLoS ONE |
---|---|
Main Authors: | , , , |
Format: | Text |
Language: | English |
Published: |
Public Library of Science
2013
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3741329 http://www.ncbi.nlm.nih.gov/pubmed/23951096 https://doi.org/10.1371/journal.pone.0071147 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:3741329 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:3741329 2023-05-15T16:34:58+02:00 Mitochondrial DNA Variation and Introgression in Siberian Taimen Hucho taimen Balakirev, Evgeniy S. Romanov, Nikolai S. Mikheev, Pavel B. Ayala, Francisco J. 2013-08-12 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3741329 http://www.ncbi.nlm.nih.gov/pubmed/23951096 https://doi.org/10.1371/journal.pone.0071147 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3741329 http://www.ncbi.nlm.nih.gov/pubmed/23951096 http://dx.doi.org/10.1371/journal.pone.0071147 This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2013 ftpubmed https://doi.org/10.1371/journal.pone.0071147 2013-09-05T03:45:38Z Siberian taimen Hucho taimen is the largest representative of the family Salmonidae inhabiting rivers of northern Eurasia. The species is under intensive aquaculture activity. To monitor natural taimen populations we have sequenced a portion (8,141 bp) of the mitochondrial (mt) genome in 28 specimens of H. taimen from six localities in the Amur River basin. Nucleotide variability is low (π = 0.0010), but structured in two divergent haplotype groups. A comparison of the data with the GenBank H. taimen mt genome (HQ897271) reveals significant differences between them in spite of the fact that the fish specimens come from neighboring geographical areas. The distribution of divergence is non-uniform with two highly pronounced divergent regions centered on two genes, ND3 and ND6. To clarify the pattern of divergence we sequenced the corresponding portion of the mt genome of lenok Brachymystax tumensis and analyzed the GenBank complete mt genomes of related species. We have found that the first and second divergent regions are identical between the GenBank H. taimen and two lenok subspecies, B. lenok and B. lenok tsinlingensis, respectively. Consequently, both divergent regions represent introgressed mtDNA resulting from intergeneric hybridization between the two lenok subspecies and H. taimen. Introgression is, however, not detected in our specimens. This plus the precise identity of the introgressed fragments between the donor and the recipient GenBank sequence suggests that the introgression is local and very recent, probably due to artificial manipulations involving taimen – lenok intergeneric hybridization. Human-mediated hybridization may become a major threat to aquatic biodiversity. Consequently we suggest that due attention needs to be given to this threat by means of responsible breeding program management, so as to prevent a potential spread of hybrid fishes that could jeopardize the resilience of locally adapted gene pools of the native H. taimen populations. Text Hucho taimen Siberian taimen PubMed Central (PMC) PLoS ONE 8 8 e71147 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Research Article |
spellingShingle |
Research Article Balakirev, Evgeniy S. Romanov, Nikolai S. Mikheev, Pavel B. Ayala, Francisco J. Mitochondrial DNA Variation and Introgression in Siberian Taimen Hucho taimen |
topic_facet |
Research Article |
description |
Siberian taimen Hucho taimen is the largest representative of the family Salmonidae inhabiting rivers of northern Eurasia. The species is under intensive aquaculture activity. To monitor natural taimen populations we have sequenced a portion (8,141 bp) of the mitochondrial (mt) genome in 28 specimens of H. taimen from six localities in the Amur River basin. Nucleotide variability is low (π = 0.0010), but structured in two divergent haplotype groups. A comparison of the data with the GenBank H. taimen mt genome (HQ897271) reveals significant differences between them in spite of the fact that the fish specimens come from neighboring geographical areas. The distribution of divergence is non-uniform with two highly pronounced divergent regions centered on two genes, ND3 and ND6. To clarify the pattern of divergence we sequenced the corresponding portion of the mt genome of lenok Brachymystax tumensis and analyzed the GenBank complete mt genomes of related species. We have found that the first and second divergent regions are identical between the GenBank H. taimen and two lenok subspecies, B. lenok and B. lenok tsinlingensis, respectively. Consequently, both divergent regions represent introgressed mtDNA resulting from intergeneric hybridization between the two lenok subspecies and H. taimen. Introgression is, however, not detected in our specimens. This plus the precise identity of the introgressed fragments between the donor and the recipient GenBank sequence suggests that the introgression is local and very recent, probably due to artificial manipulations involving taimen – lenok intergeneric hybridization. Human-mediated hybridization may become a major threat to aquatic biodiversity. Consequently we suggest that due attention needs to be given to this threat by means of responsible breeding program management, so as to prevent a potential spread of hybrid fishes that could jeopardize the resilience of locally adapted gene pools of the native H. taimen populations. |
format |
Text |
author |
Balakirev, Evgeniy S. Romanov, Nikolai S. Mikheev, Pavel B. Ayala, Francisco J. |
author_facet |
Balakirev, Evgeniy S. Romanov, Nikolai S. Mikheev, Pavel B. Ayala, Francisco J. |
author_sort |
Balakirev, Evgeniy S. |
title |
Mitochondrial DNA Variation and Introgression in Siberian Taimen Hucho taimen |
title_short |
Mitochondrial DNA Variation and Introgression in Siberian Taimen Hucho taimen |
title_full |
Mitochondrial DNA Variation and Introgression in Siberian Taimen Hucho taimen |
title_fullStr |
Mitochondrial DNA Variation and Introgression in Siberian Taimen Hucho taimen |
title_full_unstemmed |
Mitochondrial DNA Variation and Introgression in Siberian Taimen Hucho taimen |
title_sort |
mitochondrial dna variation and introgression in siberian taimen hucho taimen |
publisher |
Public Library of Science |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3741329 http://www.ncbi.nlm.nih.gov/pubmed/23951096 https://doi.org/10.1371/journal.pone.0071147 |
genre |
Hucho taimen Siberian taimen |
genre_facet |
Hucho taimen Siberian taimen |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3741329 http://www.ncbi.nlm.nih.gov/pubmed/23951096 http://dx.doi.org/10.1371/journal.pone.0071147 |
op_rights |
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0071147 |
container_title |
PLoS ONE |
container_volume |
8 |
container_issue |
8 |
container_start_page |
e71147 |
_version_ |
1766025082603307008 |