Mitochondrial genomes of Tapes dorsatus and Cardita variegata:insights into Heteroconchia phylogeny  

作　　者：Xumin WANG Hua ZHANG Xindong TENG Wenhui SUN Zhikai XING Shuang WANG Xiumei LIU Jiangyong QU Lijun WANG 

机构地区：[1]College of Life Science,Yantai University,Yantai 264005,China [2]Qingdao International Travel Healthcare Center,Qingdao 266071,China

出　　处：《Journal of Oceanology and Limnology》2024年第3期943-959,共17页海洋湖沼学报（英文）

基　　金：Supported by the Research and Development Program of Shandong Province,China(Major Science and Technology Innovation Project)(No.2021CXGC011306);the MNR Key Laboratory of Eco-Environmental Science and Technology,China(No.MEEST-2021-05);the Natural Science Foundation of Shandong Province(No.ZR2020MD002);the Doctoral Science Research Foundation of Yantai University(Nos.SM15B01,SM19B70,SM19B28);the“Double-Hundred Action”of Yantai City(No.2320004-SM20RC02)。

摘　　要：Heteroconchia,a widespread and abundant aquatic invertebrate,is an important clade of bivalve mollusks.The relationship between the three branches of Heteroconchia,Palaeoheterodonta,Archiheterodonta,and Euheterodonta has become a main controversy in molecular studies of the relationships between bivalves.In the present study,we assembled the complete mitochondrial genomes of Tapes dorsatus(Veneridae)and Cardita variegata(Carditidae)using high-throughput sequencing.C.variegata is the first mitochondrial genome belonging to the family Carditidae to be reported.We used 12 protein coding genes(excluding atp8)from the complete mitochondrial genomes of 146 species to recover the internal relationships of Heteroconchia.Our results support the traditional view of early branching of Palaeoheterodonta and the recovery of the monophyly of Palaeoheterodonta,Anomalodesmata,Imparidentia.Rearrangement analysis show that gene arrangement within Venerida was highly variable.Time-calibrated phylogenetic studies based on a relaxed molecular clock model suggested that Veneridae originated approximately 337.62 million years ago(Ma)and split into two major clades,whereas Carditidae originated approximately 510.09 Ma.Our results provide evidence of the internal relationships of Heteroconchia.

关 键 词：Tapes dorsatus Cardita variegata mitochondrial genome PHYLOGENY 

分 类 号：S917.4[农业科学—水产科学]