Conspecific sperm precedence is a reproductive barrier between free-spawning marine mussels in the northwest atlantic mytilus hybrid zone.
Reproductive isolation at the gamete stage has become a focus of speciation research because of its potential to evolve rapidly between closely related species. Conspecific sperm precedence (CSP), a type of gametic isolation, has been demonstrated in a number of taxa, both marine and terrestrial, wi...
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ftdoajarticles:oai:doaj.org/article:4732e88616f94de7b401070c17786e52 2023-05-15T17:45:44+02:00 Conspecific sperm precedence is a reproductive barrier between free-spawning marine mussels in the northwest atlantic mytilus hybrid zone. Lara K J Klibansky Michael A McCartney 2014-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0108433 https://doaj.org/article/4732e88616f94de7b401070c17786e52 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC4182449?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0108433 https://doaj.org/article/4732e88616f94de7b401070c17786e52 PLoS ONE, Vol 9, Iss 9, p e108433 (2014) Medicine R Science Q article 2014 ftdoajarticles https://doi.org/10.1371/journal.pone.0108433 2022-12-31T07:30:54Z Reproductive isolation at the gamete stage has become a focus of speciation research because of its potential to evolve rapidly between closely related species. Conspecific sperm precedence (CSP), a type of gametic isolation, has been demonstrated in a number of taxa, both marine and terrestrial, with the potential to play an important role in speciation. Free-spawning marine invertebrates are ideal subjects for the study of CSP because of a likely central role for gametic barriers in reproductive isolation. The western Atlantic Mytilus blue mussel hybrid zone, ranging from the Atlantic Canada to eastern Maine, exhibits characteristics conducive to the study of CSP. Previous studies have shown that gametic incompatibility is incomplete, variable in strength and the genotype distribution is bimodal-dominated by the parental species, with a low frequency of hybrids. We conducted gamete crossing experiments using M. trossulus and M. edulis individuals collected from natural populations during the spring spawning season in order to detect the presence or absence of CSP within this hybrid zone. We detected CSP, defined here as a reduction in heterospecific offspring from competitive fertilizations in vitro compared to that seen in non-competitive fertilizations, in five of the twelve crosses in which conspecific crosses were detectable. This is the first finding of CSP in a naturally hybridizing population of a free-spawning marine invertebrate. Our findings support earlier predictions that CSP can promote assortative fertilization in bimodal hybrid zones, further advancing their hypothesized progression towards full speciation. Despite strong CSP numerous heterospecific fertilizations remain, reinforcing the hypothesis that compatible females are a source of hybrid offspring in mixed natural spawns. Article in Journal/Newspaper Northwest Atlantic Directory of Open Access Journals: DOAJ Articles Canada PLoS ONE 9 9 e108433 |
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Medicine R Science Q |
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Medicine R Science Q Lara K J Klibansky Michael A McCartney Conspecific sperm precedence is a reproductive barrier between free-spawning marine mussels in the northwest atlantic mytilus hybrid zone. |
topic_facet |
Medicine R Science Q |
description |
Reproductive isolation at the gamete stage has become a focus of speciation research because of its potential to evolve rapidly between closely related species. Conspecific sperm precedence (CSP), a type of gametic isolation, has been demonstrated in a number of taxa, both marine and terrestrial, with the potential to play an important role in speciation. Free-spawning marine invertebrates are ideal subjects for the study of CSP because of a likely central role for gametic barriers in reproductive isolation. The western Atlantic Mytilus blue mussel hybrid zone, ranging from the Atlantic Canada to eastern Maine, exhibits characteristics conducive to the study of CSP. Previous studies have shown that gametic incompatibility is incomplete, variable in strength and the genotype distribution is bimodal-dominated by the parental species, with a low frequency of hybrids. We conducted gamete crossing experiments using M. trossulus and M. edulis individuals collected from natural populations during the spring spawning season in order to detect the presence or absence of CSP within this hybrid zone. We detected CSP, defined here as a reduction in heterospecific offspring from competitive fertilizations in vitro compared to that seen in non-competitive fertilizations, in five of the twelve crosses in which conspecific crosses were detectable. This is the first finding of CSP in a naturally hybridizing population of a free-spawning marine invertebrate. Our findings support earlier predictions that CSP can promote assortative fertilization in bimodal hybrid zones, further advancing their hypothesized progression towards full speciation. Despite strong CSP numerous heterospecific fertilizations remain, reinforcing the hypothesis that compatible females are a source of hybrid offspring in mixed natural spawns. |
format |
Article in Journal/Newspaper |
author |
Lara K J Klibansky Michael A McCartney |
author_facet |
Lara K J Klibansky Michael A McCartney |
author_sort |
Lara K J Klibansky |
title |
Conspecific sperm precedence is a reproductive barrier between free-spawning marine mussels in the northwest atlantic mytilus hybrid zone. |
title_short |
Conspecific sperm precedence is a reproductive barrier between free-spawning marine mussels in the northwest atlantic mytilus hybrid zone. |
title_full |
Conspecific sperm precedence is a reproductive barrier between free-spawning marine mussels in the northwest atlantic mytilus hybrid zone. |
title_fullStr |
Conspecific sperm precedence is a reproductive barrier between free-spawning marine mussels in the northwest atlantic mytilus hybrid zone. |
title_full_unstemmed |
Conspecific sperm precedence is a reproductive barrier between free-spawning marine mussels in the northwest atlantic mytilus hybrid zone. |
title_sort |
conspecific sperm precedence is a reproductive barrier between free-spawning marine mussels in the northwest atlantic mytilus hybrid zone. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2014 |
url |
https://doi.org/10.1371/journal.pone.0108433 https://doaj.org/article/4732e88616f94de7b401070c17786e52 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
PLoS ONE, Vol 9, Iss 9, p e108433 (2014) |
op_relation |
http://europepmc.org/articles/PMC4182449?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0108433 https://doaj.org/article/4732e88616f94de7b401070c17786e52 |
op_doi |
https://doi.org/10.1371/journal.pone.0108433 |
container_title |
PLoS ONE |
container_volume |
9 |
container_issue |
9 |
container_start_page |
e108433 |
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