| RRC ID |
79332
|
| Author |
Marcionetti A, Bertrand JAM, Cortesi F, Donati GFA, Heim S, Huyghe F, Kochzius M, Pellissier L, Salamin N.
|
| Title |
Recurrent gene flow events occurred during the diversification of clownfishes of the skunk complex.
|
| Journal |
Mol Ecol
|
| Abstract |
Clownfish (subfamily Amphiprioninae) are an iconic group of coral reef fish that evolved a mutualistic interaction with sea anemones, which triggered the adaptive radiation of the clade. Within clownfishes, the "skunk complex" is particularly interesting. Besides ecological speciation, interspecific gene flow and hybrid speciation are thought to have shaped the evolution of the group. We investigated the mechanisms characterizing the diversification of this complex. By taking advantage of their disjunct geographical distribution, we obtained whole-genome data of sympatric and allopatric populations of the three main species of the complex (Amphiprion akallopisos, A. perideraion and A. sandaracinos). We examined population structure, genomic divergence and introgression signals and performed demographic modelling to identify the most realistic diversification scenario. We excluded scenarios of strict isolation or hybrid origin of A. sandaracinos. We discovered moderate gene flow from A. perideraion to the ancestor of A. akallopisos + A. sandaracinos and weak gene flow between the species in the Indo-Australian Archipelago throughout the diversification of the group. We identified introgressed regions in A. sandaracinos and detected in A. perideraion two large regions of high divergence from the two other species. While we found that gene flow has occurred throughout the species' diversification, we also observed that recent admixture was less pervasive than initially thought, suggesting a role of host repartition or behavioural barriers in maintaining the genetic identity of the species in sympatry.
|
| Pages |
e17347
|
| Published |
2024-4-16
|
| DOI |
10.1111/mec.17347
|
| PMID |
38624248
|
| MeSH |
Animals
Australia
Coral Reefs
Gene Flow*
Genetic Speciation*
Genetics, Population*
Perciformes* / genetics
Phylogeny
Symbiosis / genetics
Sympatry
|
| IF |
5.163
|
| Resource |
| GBIF |
Vertebrate specimens of Kumamoto City Museum
Image Database of Fishes in the Kanagawa Prefectural Museum of Natural History
Fish collection of the Kagoshima University Museum
Fish Collection of Yokosuka City Museum
Fish Collection of Hokkaido University
Fish Specimens of Tokushima Prefectural Museum, Japan
Fish Specimens of Graduate School of Bioresources Mie University
Fish specimen database of Osaka Museum of Natural History
Fish collection of National Museum of Nature and Science
Fish Collection of Natural History Museum and Institute, Chiba
Fish Collection of Kanagawa Prefectural Museum of Natural History |
