Flatfish monophyly refereed by the relationship of Psettodes in Carangimorphariae
Abstract Background The monophyly of flatfishes has not been supported in many molecular phylogenetic studies. The monophyly of Pleuronectoidei, which comprises all but one family of flatfishes, is broadly supported. However, the Psettodoidei, comprising the single family Psettodidae, is often found...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2018-05-01
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| Series: | BMC Genomics |
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| Online Access: | http://link.springer.com/article/10.1186/s12864-018-4788-5 |
| _version_ | 1811235872234799104 |
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| author | Wei Shi Shixi Chen Xiaoyu Kong Lizhen Si Li Gong Yanchun Zhang Hui Yu |
| author_facet | Wei Shi Shixi Chen Xiaoyu Kong Lizhen Si Li Gong Yanchun Zhang Hui Yu |
| author_sort | Wei Shi |
| collection | DOAJ |
| description | Abstract Background The monophyly of flatfishes has not been supported in many molecular phylogenetic studies. The monophyly of Pleuronectoidei, which comprises all but one family of flatfishes, is broadly supported. However, the Psettodoidei, comprising the single family Psettodidae, is often found to be most closely related to other carangimorphs based on substantial sequencing efforts and diversely analytical methods. In this study, we examined why this particular result is often obtained. Results The mitogenomes of five flatfishes were determined. Select mitogenomes of representative carangimorph species were further employed for phylogenetic and molecular clock analyses. Our phylogenetic results do not fully support Psettodes as a sister group to pleuronectoids or other carangimorphs. And results also supported the evidence of long-branch attraction between Psettodes and the adjacent clades. Two chronograms, derived from Bayesian relaxed-clock methods, suggest that over a short period in the early Paleocene, a series of important evolutionary events occurred in carangimorphs. Conclusion Based on insights provided by the molecular clock, we propose the following evolutionary explanation for the difficulty in determining the phylogenetic position of Psettodes: The initial diversification of Psettodes was very close in time to the initial diversification of carangimorphs, and the primary diversification time of pleuronectoids, the other suborder of flatfishes, occurred later than that of some percomorph taxa. Additionally, the clade of Psettodes is long and naked branch, which supports the uncertainty of its phylogenetic placement. Finally, we confirmed the monophyly of flatfishes, which was accepted by most ichthyologists. |
| first_indexed | 2024-04-12T11:59:33Z |
| format | Article |
| id | doaj.art-c9c578f873e04fe8af5657bc57d7f5bc |
| institution | Directory Open Access Journal |
| issn | 1471-2164 |
| language | English |
| last_indexed | 2024-04-12T11:59:33Z |
| publishDate | 2018-05-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Genomics |
| spelling | doaj.art-c9c578f873e04fe8af5657bc57d7f5bc2022-12-22T03:33:55ZengBMCBMC Genomics1471-21642018-05-0119111110.1186/s12864-018-4788-5Flatfish monophyly refereed by the relationship of Psettodes in CarangimorphariaeWei Shi0Shixi Chen1Xiaoyu Kong2Lizhen Si3Li Gong4Yanchun Zhang5Hui Yu6College of Life Science, Foshan UniversityCAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of SciencesCAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of SciencesCAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of SciencesCAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of SciencesCAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of SciencesCollege of Life Science, Foshan UniversityAbstract Background The monophyly of flatfishes has not been supported in many molecular phylogenetic studies. The monophyly of Pleuronectoidei, which comprises all but one family of flatfishes, is broadly supported. However, the Psettodoidei, comprising the single family Psettodidae, is often found to be most closely related to other carangimorphs based on substantial sequencing efforts and diversely analytical methods. In this study, we examined why this particular result is often obtained. Results The mitogenomes of five flatfishes were determined. Select mitogenomes of representative carangimorph species were further employed for phylogenetic and molecular clock analyses. Our phylogenetic results do not fully support Psettodes as a sister group to pleuronectoids or other carangimorphs. And results also supported the evidence of long-branch attraction between Psettodes and the adjacent clades. Two chronograms, derived from Bayesian relaxed-clock methods, suggest that over a short period in the early Paleocene, a series of important evolutionary events occurred in carangimorphs. Conclusion Based on insights provided by the molecular clock, we propose the following evolutionary explanation for the difficulty in determining the phylogenetic position of Psettodes: The initial diversification of Psettodes was very close in time to the initial diversification of carangimorphs, and the primary diversification time of pleuronectoids, the other suborder of flatfishes, occurred later than that of some percomorph taxa. Additionally, the clade of Psettodes is long and naked branch, which supports the uncertainty of its phylogenetic placement. Finally, we confirmed the monophyly of flatfishes, which was accepted by most ichthyologists.http://link.springer.com/article/10.1186/s12864-018-4788-5Mitochondrial genomesPsettodesPleuronectiformesMolecular clockPhylogeny |
| spellingShingle | Wei Shi Shixi Chen Xiaoyu Kong Lizhen Si Li Gong Yanchun Zhang Hui Yu Flatfish monophyly refereed by the relationship of Psettodes in Carangimorphariae BMC Genomics Mitochondrial genomes Psettodes Pleuronectiformes Molecular clock Phylogeny |
| title | Flatfish monophyly refereed by the relationship of Psettodes in Carangimorphariae |
| title_full | Flatfish monophyly refereed by the relationship of Psettodes in Carangimorphariae |
| title_fullStr | Flatfish monophyly refereed by the relationship of Psettodes in Carangimorphariae |
| title_full_unstemmed | Flatfish monophyly refereed by the relationship of Psettodes in Carangimorphariae |
| title_short | Flatfish monophyly refereed by the relationship of Psettodes in Carangimorphariae |
| title_sort | flatfish monophyly refereed by the relationship of psettodes in carangimorphariae |
| topic | Mitochondrial genomes Psettodes Pleuronectiformes Molecular clock Phylogeny |
| url | http://link.springer.com/article/10.1186/s12864-018-4788-5 |
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