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Mitogenomic phylogeny, biogeography, and cryptic divergence of the genus Silurus (Siluriformes: Siluridae)

文献类型： 外文期刊

作者： Chen, Weitao 1 ; Hubert, Nicolas 5 ; Li, Yuefei 1 ; Zhu, Shuli 1 ; Wang, Jun 6 ; Xiang, Denggao 1 ; Gao, Shang 1 ; Wang, Chunni Kou Jilong 7 ; Wang, Tai 8 ; Liang, Zhiqiang 9 ; Wu, Junjie 1 ; Li, Xinhui 1 ; Li, Jie 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Guangzhou 510380, Guangdong, Peoples R China

2.Guangdong Prov Key Lab Aquat Anim Immune Technol G, Guangzhou 510380, Guangdong, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Prevent & Control Aquat Invas Alien Specie, Guangzhou 510380, Guangdong, Peoples R China

4.Sci Observing & Expt Stn Natl Fisheries Resources, Guangzhou 510380, Guangdong, Peoples R China

5.Inst Rech Dev, ISEM UM CNRS IRD, UMR 226, Montpellier, France

6.Xian Univ Technol, State Key Lab Ecohydraul Northwest Arid Reg China, Xian 710048, Shaanxi, Peoples R China

7.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Harbin 150076, Heilongjiang, Peoples R China

8.Gansu Fisheries Res Inst, Lanzhou 730030, Gansu, Peoples R China

9.Hunan Fisheries Sci Inst, Changsha 410153, Hunan, Peoples R China

10.Yunnan Inst Fishery Sci Res, Kunming 650111, Yunnan, Peoples R China

关键词： Maximum likelihood; Bayesian inferences; Ancestral area estimation; Cryptic diversity; Dispersal pathways; Mitogenomes; Sea levels

期刊名称：ZOOLOGICAL RESEARCH （ 影响因子：4.0； 五年影响因子：4.5 ）

ISSN： 2095-8137

年卷期： 2024 年 45 卷 4 期

页码：

收录情况： SCI

摘要： The genus Silurus , an important group of catfish, exhibits heterogeneous distribution in Eurasian freshwater systems. This group includes economically important and endangered species, thereby attracting considerable scientific interest. Despite this interest, the lack of a comprehensive phylogenetic framework impedes our understanding of the mechanisms underlying the extensive diversity found within this genus. Herein, we analyzed 89 newly sequenced and 20 previously published mitochondrial genomes (mitogenomes) from 13 morphological species to reconstruct the phylogenetic relationships, biogeographic history, and species diversity of Silurus . Our phylogenetic reconstructions identified eight clades, supported by both maximum-likelihood and Bayesian inference. Sequence-based species delimitation analyses yielded multiple molecular operational taxonomic units (MOTUs) in several taxa, including the Silurus asotus complex (four MOTUs) and Silurus microdorsalis (two MOTUs), suggesting that species diversity is underestimated in the genus. A reconstructed timecalibrated tree of Silurus species provided an age estimate of the most recent common ancestor of approximately 37.61 million years ago (Ma), with divergences among clades within the genus occurring between 11.56 Ma and 29.44 Ma, and divergences among MOTUs within species occurring between 3.71 Ma and 11.56 Ma. Biogeographic reconstructions suggested that the ancestral area for the genus likely encompassed China and the Korean Peninsula, with multiple inferred dispersal events to Europe and Central and Western Asia between 21.78 Ma and 26.67 Ma and to Japan between 2.51 Ma and 18.42 Ma. Key factors such as the Eocene-Oligocene extinction event, onset and intensification of the monsoon system, and glacial cycles associated with sea-level fluctuations have likely played significant roles in shaping the evolutionary history of the genus Silurus .

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