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Population genetics of swamp eel in the Yangtze River: comparative analyses between mitochondrial and microsatellite data provide novel insights

The swamp eel (Monopterus albus) is a typical sex reversal fish with high economic value. Several phylogeographic studies have been performed using various markers but comparative research between mitochondrial and nuclear markers is rare. Here, a fine-scale study was performed across six sites alon...

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Autores principales: Zhou, Huaxing, Hu, Yuting, Jiang, He, Duan, Guoqing, Ling, Jun, Pan, Tingshuang, Chen, Xiaolei, Wang, Huan, Zhang, Ye
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6979408/
https://www.ncbi.nlm.nih.gov/pubmed/31998563
http://dx.doi.org/10.7717/peerj.8415
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author Zhou, Huaxing
Hu, Yuting
Jiang, He
Duan, Guoqing
Ling, Jun
Pan, Tingshuang
Chen, Xiaolei
Wang, Huan
Zhang, Ye
author_facet Zhou, Huaxing
Hu, Yuting
Jiang, He
Duan, Guoqing
Ling, Jun
Pan, Tingshuang
Chen, Xiaolei
Wang, Huan
Zhang, Ye
author_sort Zhou, Huaxing
collection PubMed
description The swamp eel (Monopterus albus) is a typical sex reversal fish with high economic value. Several phylogeographic studies have been performed using various markers but comparative research between mitochondrial and nuclear markers is rare. Here, a fine-scale study was performed across six sites along the Yangtze River including three sites on the main stem and three sites from tributaries. A total of 180 swamp eel individuals were collected. Genetic structure and demographic history were explored using data from two mitochondrial genes and eight microsatellite loci. The results revealed the samples from tributary sites formed three separate clades which contained site-specific lineages. Geographic isolation and the habitat patchiness caused by seasonal cutoff were inferred to be the reasons for this differentiation. Strong gene flow was detected among the sites along the main stem. Rapid flow of the river main stem may provide the dynamic for the migration of swamp eel. Interestingly, the comparative analyses between the two marker types was discordant. Mitochondrial results suggested samples from three tributary sites were highly differentiated. However, microsatellite analyses indicated the tributary samples were moderately differentiated. We conclude this discordance is mainly caused by the unique life history of sex reversal fish. Our study provides novel insights regarding the population genetics of sex reversal fish.
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spelling pubmed-69794082020-01-29 Population genetics of swamp eel in the Yangtze River: comparative analyses between mitochondrial and microsatellite data provide novel insights Zhou, Huaxing Hu, Yuting Jiang, He Duan, Guoqing Ling, Jun Pan, Tingshuang Chen, Xiaolei Wang, Huan Zhang, Ye PeerJ Aquaculture, Fisheries and Fish Science The swamp eel (Monopterus albus) is a typical sex reversal fish with high economic value. Several phylogeographic studies have been performed using various markers but comparative research between mitochondrial and nuclear markers is rare. Here, a fine-scale study was performed across six sites along the Yangtze River including three sites on the main stem and three sites from tributaries. A total of 180 swamp eel individuals were collected. Genetic structure and demographic history were explored using data from two mitochondrial genes and eight microsatellite loci. The results revealed the samples from tributary sites formed three separate clades which contained site-specific lineages. Geographic isolation and the habitat patchiness caused by seasonal cutoff were inferred to be the reasons for this differentiation. Strong gene flow was detected among the sites along the main stem. Rapid flow of the river main stem may provide the dynamic for the migration of swamp eel. Interestingly, the comparative analyses between the two marker types was discordant. Mitochondrial results suggested samples from three tributary sites were highly differentiated. However, microsatellite analyses indicated the tributary samples were moderately differentiated. We conclude this discordance is mainly caused by the unique life history of sex reversal fish. Our study provides novel insights regarding the population genetics of sex reversal fish. PeerJ Inc. 2020-01-21 /pmc/articles/PMC6979408/ /pubmed/31998563 http://dx.doi.org/10.7717/peerj.8415 Text en ©2020 Zhou et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Aquaculture, Fisheries and Fish Science
Zhou, Huaxing
Hu, Yuting
Jiang, He
Duan, Guoqing
Ling, Jun
Pan, Tingshuang
Chen, Xiaolei
Wang, Huan
Zhang, Ye
Population genetics of swamp eel in the Yangtze River: comparative analyses between mitochondrial and microsatellite data provide novel insights
title Population genetics of swamp eel in the Yangtze River: comparative analyses between mitochondrial and microsatellite data provide novel insights
title_full Population genetics of swamp eel in the Yangtze River: comparative analyses between mitochondrial and microsatellite data provide novel insights
title_fullStr Population genetics of swamp eel in the Yangtze River: comparative analyses between mitochondrial and microsatellite data provide novel insights
title_full_unstemmed Population genetics of swamp eel in the Yangtze River: comparative analyses between mitochondrial and microsatellite data provide novel insights
title_short Population genetics of swamp eel in the Yangtze River: comparative analyses between mitochondrial and microsatellite data provide novel insights
title_sort population genetics of swamp eel in the yangtze river: comparative analyses between mitochondrial and microsatellite data provide novel insights
topic Aquaculture, Fisheries and Fish Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6979408/
https://www.ncbi.nlm.nih.gov/pubmed/31998563
http://dx.doi.org/10.7717/peerj.8415
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