ArticleScientific reports2018
Coupling molecular data and experimental crosses sheds light about species delineation: a case study with the genus Ciona.
Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed.
- Adaptive alien genes are maintained amid a vanishing introgression footprint in a sea squirt.Evolution letters · 2024Article
- Chromosomal Inversion Polymorphisms in Two Sympatric Ascidian Lineages.Genome biology and evolution · 2021Article
- Anthropogenic hybridization at sea: three evolutionary questions relevant to invasive species management.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2020Review
- Asymmetric Fitness of Second-Generation Interspecific Hybrids BetweenG3 (Bethesda, Md.) · 2020Article
- Delineating species in the speciation continuum: A proposal.Evolutionary applications · 2019Review
- A Framework for Understanding Marine Cosmopolitanism in the Anthropocene.Frontiers in Marine Science · 2018Article
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3 authors.
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Abstract
Molecular studies sometimes reveal evolutionary divergence within accepted species. Such findings can initiate taxonomic revision, as exemplified in the formerly recognized species Ciona intestinalis. While an increasing number of studies have examined the ecology, reproductive barriers and genetics of C. intestinalis and C. robusta, there are still much uncertainties regarding other species of this genus. Using experimental crosses and mitochondrial data, we investigated the evolutionary relationships among four native and introduced Ciona spp., found in sympatry in the Mediterranean Sea or English Channel. Outcome of 62 bi-parental reciprocal crosses between C. intestinalis, C. robusta, C. roulei and C. edwardsi showed that C. edwardsi is reproductively isolated from the other taxa, which is in agreement with its distinct location in the phylogenetic tree. Conversely, hybrids are easily obtained in both direction when crossing C. intestinalis and C. roulei, reinforcing the hypothesis of two genetically differentiated lineages but likely being from a same species. Altogether, this study sheds light on the evolutionary relationship in this complex genus. It also calls for further investigation notably based on genome-wide investigation to better describe the evolutionary history within the genus Ciona, a challenging task in a changing world where biological introductions are shuffling species distribution.
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