Liu Kuiyan, Liu Shuya, Chen Yang, Liu Feng, Zhao Yongfang, Chen Nansheng
CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.
Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
Mitochondrial DNA B Resour. 2021 Apr 26;6(4):1560-1562. doi: 10.1080/23802359.2021.1916409.
is a species-rich genus with about 170 described species, many of which are harmful algal species with significant negative ecological impact. However, genome data of these species remain limited. In this study, the complete mitochondrial genome of (Hendey) Hasle 1973 was determined for the first time. The circular genome was 40,470 bp in length with GC content of 30.98%. It encodes 63 genes including 36 protein-coding genes (PCGs), 25 tRNA genes, and two rRNA genes. Phylogenetic analysis using concatenated PCGs suggested that had a closer evolutionary relationship with of a different family (Skeletonemataceae) than , suggesting complex evolutionary relationship among species in these two families. Colinearity analysis also revealed fewer genome rearrangements between and than that between and . This study suggests that mitochondrial genomes of many more species in the Thalassiosiraceae and Skeletonemataceae families are needed to disentangle the complex evolutionary relationships in the order of Thalassiosirales.
是一个物种丰富的属，约有170个已描述的物种，其中许多是具有重大负面生态影响的有害藻类物种。然而，这些物种的基因组数据仍然有限。在本研究中，首次确定了（亨迪）哈斯勒1973年的完整线粒体基因组。环状基因组长度为40470 bp，GC含量为30.98%。它编码63个基因，包括36个蛋白质编码基因（PCG）、25个tRNA基因和两个rRNA基因。使用串联PCG进行的系统发育分析表明，与不同科（骨条藻科）的相比，与的进化关系更密切，这表明这两个科的物种之间存在复杂的进化关系。共线性分析还显示，与之间的基因组重排比与之间的少。这项研究表明，需要更多硅藻科和骨条藻科物种的线粒体基因组来理清硅藻目的复杂进化关系。
