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The Mitogenomic Landscape of Hexacorallia Corals: Insight into Their Slow Evolution

文献类型： 外文期刊

作者： Wei, Zhanfei 1 ; Yang, Yang 2 ; Meng, Lihui 4 ; Zhang, Nannan 2 ; Liu, Shanshan 2 ; Meng, Liang 2 ; Li, Yang 5 ; Shao, Changwei 1 ;

作者机构： 1.Yellow Sea Fisheries Res Inst, Chinese Acad Fishery Sci, State Key Lab Mariculture Biobreeding & Sustainabl, Qingdao 266071, Peoples R China

2.BGI Shenzhen, BGI Qingdao, Qingdao 266555, Peoples R China

3.Ocean Univ China, Coll Marine Life Sci, Qingdao 266100, Peoples R China

4.Qingdao Agr Univ, Sch Marine Sci & Engn, Qingdao 266109, Peoples R China

5.Chinese Acad Sci, Lab Marine Organism Taxon & Phylogeny, Inst Oceanol, Qingdao 266071, Peoples R China

关键词： deep-sea corals; Hexacorallia; mitogenomes; phylogenetics

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.6 ）

ISSN： 1661-6596

年卷期： 2024 年 25 卷 15 期

页码：

收录情况： SCI

摘要： The utility of the mitochondrial genomes (mitogenomes) in analyzing the evolutionary history of animals has been proven. Five deep-sea corals (Bathypathes sp.1, Bathypathes sp.2, Schizopathidae 1, Trissopathes sp., and Leiopathes sp.) were collected in the South China Sea (SCS). Initially, the structures and collinearity of the five deep-sea coral mitogenomes were analyzed. The gene arrangements in the five deep-sea coral mitogenomes were similar to those in the order Antipatharia, which evidenced their conservation throughout evolutionary history. Additionally, to elucidate the slow evolutionary rates in Hexacorallia mitogenomes, we conducted comprehensive analyses, including examining phylogenetic relationships, performing average nucleotide identity (ANI) analysis, and assessing GC-skew dissimilarity combining five deep-sea coral mitogenomes and 522 reference Hexacorallia mitogenomes. Phylogenetic analysis using 13 conserved proteins revealed that species clustered together at the order level, and they exhibited interspersed distributions at the family level. The ANI results revealed that species had significant similarities (identity > 85%) within the same order, while species from different orders showed notable differences (identity < 80%). The investigation of the Hexacorallia mitogenomes also highlighted that the GC-skew dissimilarity was highly significant at the order level, but not as pronounced at the family level. These results might be attributed to the slow evolution rate of Hexacorallia mitogenomes and provide evidence of mitogenomic diversity. Furthermore, divergence time analysis revealed older divergence times assessed via mitogenomes compared with nuclear data, shedding light on significant evolutionary events shaping distinct orders within Hexacorallia corals. Those findings provide new insights into understanding the slow evolutionary rates of deep-sea corals in all lineages of Hexacorallia using their mitogenomes.

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