Data from: Assessing pre- and post-zygotic barriers between North Atlantic eels (Anguilla anguilla and A. rostrata)
Elucidating barriers to gene flow is important for understanding the dynamics of speciation. Here we investigate pre- and post-zygotic mechanisms acting between the two hybridizing species of Atlantic eels: Anguilla anguilla and A. rostrata. Temporally varying hybridization was examined by analyzing...
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ftdryad:oai:v1.datadryad.org:10255/dryad.124308 2023-05-15T13:27:22+02:00 Data from: Assessing pre- and post-zygotic barriers between North Atlantic eels (Anguilla anguilla and A. rostrata) Jacobsen, Magnus W. Smedegaard, Line Sørensen, Sune R. Pujolar, José M. Munk, Peter Jónsson, Bjarni Magnussen, Eyðfinn Hansen, Michael M. North American North Europe Sargasso Sea 2000-2014 2016-08-29T13:39:39Z http://hdl.handle.net/10255/dryad.124308 https://doi.org/10.5061/dryad.v5m24 unknown doi:10.5061/dryad.v5m24/1 doi:10.5061/dryad.v5m24/2 doi:10.1038/hdy.2016.96 doi:10.5061/dryad.v5m24 Jacobsen MW, Smedegaard L, Sørensen SR, Pujolar JM, Munk P, Jónsson B, Magnussen E, Hansen MM (2017) Assessing pre- and post-zygotic barriers between North Atlantic eels (Anguilla anguilla and A. rostrata). Heredity 118(3): 266-275. 0018-067X http://hdl.handle.net/10255/dryad.124308 gene flow selection cytonuclear incompatibility hybrids speciation Atlantic eels Article 2016 ftdryad https://doi.org/10.5061/dryad.v5m24 https://doi.org/10.5061/dryad.v5m24/1 https://doi.org/10.5061/dryad.v5m24/2 https://doi.org/10.1038/hdy.2016.96 2020-01-01T15:39:24Z Elucidating barriers to gene flow is important for understanding the dynamics of speciation. Here we investigate pre- and post-zygotic mechanisms acting between the two hybridizing species of Atlantic eels: Anguilla anguilla and A. rostrata. Temporally varying hybridization was examined by analyzing 85 species-diagnostic single-nucleotide polymorphisms (SNPs; FST greater than or equal to0.95) in eel larvae sampled in the spawning region in the Sargasso Sea in 2007 (N=92) and 2014 (N=460). We further investigated whether genotypes at these SNPs were nonrandomly distributed in post-F1 hybrids, indicating selection. Finally, we sequenced the mitochondrial ATP6 and nuclear ATP5c1 genes in 19 hybrids, identified using SNP and restriction site associated DNA (RAD) sequencing data, to test a previously proposed hypothesis of cytonuclear incompatibility leading to adenosine triphosphate (ATP) synthase dysfunction and selection against hybrids. No F1 hybrids but only later backcrosses were observed in the Sargasso Sea in 2007 and 2014. This suggests that interbreeding between the two species only occurs in some years, possibly controlled by environmental conditions at the spawning grounds, or that interbreeding has diminished through time as a result of a declining number of spawners. Moreover, potential selection was found at the nuclear and the cytonuclear levels. Nonetheless, one glass eel individual showed a mismatch, involving an American ATP6 haplotype and European ATP5c1 alleles. This contradicted the presence of cytonuclear incompatibility but may be explained by that (1) cytonuclear incompatibility is incomplete, (2) selection acts at a later life stage or (3) other genes are important for protein function. In total, the study demonstrates the utility of genomic data when examining pre- and post-zyotic barriers in natural hybrids. Article in Journal/Newspaper Anguilla anguilla North Atlantic Dryad Digital Repository (Duke University) |
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Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
gene flow selection cytonuclear incompatibility hybrids speciation Atlantic eels |
spellingShingle |
gene flow selection cytonuclear incompatibility hybrids speciation Atlantic eels Jacobsen, Magnus W. Smedegaard, Line Sørensen, Sune R. Pujolar, José M. Munk, Peter Jónsson, Bjarni Magnussen, Eyðfinn Hansen, Michael M. Data from: Assessing pre- and post-zygotic barriers between North Atlantic eels (Anguilla anguilla and A. rostrata) |
topic_facet |
gene flow selection cytonuclear incompatibility hybrids speciation Atlantic eels |
description |
Elucidating barriers to gene flow is important for understanding the dynamics of speciation. Here we investigate pre- and post-zygotic mechanisms acting between the two hybridizing species of Atlantic eels: Anguilla anguilla and A. rostrata. Temporally varying hybridization was examined by analyzing 85 species-diagnostic single-nucleotide polymorphisms (SNPs; FST greater than or equal to0.95) in eel larvae sampled in the spawning region in the Sargasso Sea in 2007 (N=92) and 2014 (N=460). We further investigated whether genotypes at these SNPs were nonrandomly distributed in post-F1 hybrids, indicating selection. Finally, we sequenced the mitochondrial ATP6 and nuclear ATP5c1 genes in 19 hybrids, identified using SNP and restriction site associated DNA (RAD) sequencing data, to test a previously proposed hypothesis of cytonuclear incompatibility leading to adenosine triphosphate (ATP) synthase dysfunction and selection against hybrids. No F1 hybrids but only later backcrosses were observed in the Sargasso Sea in 2007 and 2014. This suggests that interbreeding between the two species only occurs in some years, possibly controlled by environmental conditions at the spawning grounds, or that interbreeding has diminished through time as a result of a declining number of spawners. Moreover, potential selection was found at the nuclear and the cytonuclear levels. Nonetheless, one glass eel individual showed a mismatch, involving an American ATP6 haplotype and European ATP5c1 alleles. This contradicted the presence of cytonuclear incompatibility but may be explained by that (1) cytonuclear incompatibility is incomplete, (2) selection acts at a later life stage or (3) other genes are important for protein function. In total, the study demonstrates the utility of genomic data when examining pre- and post-zyotic barriers in natural hybrids. |
format |
Article in Journal/Newspaper |
author |
Jacobsen, Magnus W. Smedegaard, Line Sørensen, Sune R. Pujolar, José M. Munk, Peter Jónsson, Bjarni Magnussen, Eyðfinn Hansen, Michael M. |
author_facet |
Jacobsen, Magnus W. Smedegaard, Line Sørensen, Sune R. Pujolar, José M. Munk, Peter Jónsson, Bjarni Magnussen, Eyðfinn Hansen, Michael M. |
author_sort |
Jacobsen, Magnus W. |
title |
Data from: Assessing pre- and post-zygotic barriers between North Atlantic eels (Anguilla anguilla and A. rostrata) |
title_short |
Data from: Assessing pre- and post-zygotic barriers between North Atlantic eels (Anguilla anguilla and A. rostrata) |
title_full |
Data from: Assessing pre- and post-zygotic barriers between North Atlantic eels (Anguilla anguilla and A. rostrata) |
title_fullStr |
Data from: Assessing pre- and post-zygotic barriers between North Atlantic eels (Anguilla anguilla and A. rostrata) |
title_full_unstemmed |
Data from: Assessing pre- and post-zygotic barriers between North Atlantic eels (Anguilla anguilla and A. rostrata) |
title_sort |
data from: assessing pre- and post-zygotic barriers between north atlantic eels (anguilla anguilla and a. rostrata) |
publishDate |
2016 |
url |
http://hdl.handle.net/10255/dryad.124308 https://doi.org/10.5061/dryad.v5m24 |
op_coverage |
North American North Europe Sargasso Sea 2000-2014 |
genre |
Anguilla anguilla North Atlantic |
genre_facet |
Anguilla anguilla North Atlantic |
op_relation |
doi:10.5061/dryad.v5m24/1 doi:10.5061/dryad.v5m24/2 doi:10.1038/hdy.2016.96 doi:10.5061/dryad.v5m24 Jacobsen MW, Smedegaard L, Sørensen SR, Pujolar JM, Munk P, Jónsson B, Magnussen E, Hansen MM (2017) Assessing pre- and post-zygotic barriers between North Atlantic eels (Anguilla anguilla and A. rostrata). Heredity 118(3): 266-275. 0018-067X http://hdl.handle.net/10255/dryad.124308 |
op_doi |
https://doi.org/10.5061/dryad.v5m24 https://doi.org/10.5061/dryad.v5m24/1 https://doi.org/10.5061/dryad.v5m24/2 https://doi.org/10.1038/hdy.2016.96 |
_version_ |
1766397969654874112 |