细纹方蟹的线粒体基因组全序列：方蟹科的首个代表及在短尾下目内的系统发育位置。
The complete mitochondrial genome of Calappa bilineata: The first representative from the family Calappidae and its phylogenetic position within Brachyura.
机构信息
National Engineering Laboratory of Marine Germplasm Resources Exploration and Utilization, Zhejiang Ocean University, 316022 Zhoushan, China; Marine Science and Technology College, Zhejiang Ocean University, 316022 Zhoushan, China.
National Engineering Laboratory of Marine Germplasm Resources Exploration and Utilization, Zhejiang Ocean University, 316022 Zhoushan, China; Marine Science and Technology College, Zhejiang Ocean University, 316022 Zhoushan, China; Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning 530007, China.
出版信息
Genomics. 2020 May;112(3):2516-2523. doi: 10.1016/j.ygeno.2020.02.003. Epub 2020 Feb 8.
In this study, we determined the complete mitogenome sequence of Calappa bilineata, which is the first mitogenome of Calappidae up to now. The total length is 15,606 bp and includes 13 protein-coding genes, 22 transfer RNAs, two ribosomal RNAs and one control region. The genome composition is highly A + T biased (68.7%), and exhibits a negative AT-skew (-0.010) and GC-skew (-0.267). As with other invertebrate mitogenomes, the PCGs start with the standard ATN and stop with the standard TAN codons or incomplete T. Phylogenetic analysis showed that C. bilineata was most closely related to Matuta planipes (Matutidae), and these two species formed a sister clade, constituting a Calappoidea group and forming a sister clade with part of Eriphioidea. The existence of the polyphyletic families raised doubts over the traditional classification system. These results will help to better understand the features of the C. bilineata mitogenome and lay foundation for further evolutionary relationships within Brachyura.
在这项研究中，我们确定了中华鳖的完整线粒体基因组序列，这是迄今为止第一个中华鳖科的线粒体基因组。总长度为 15606bp，包括 13 个蛋白质编码基因、22 个转移 RNA、两个核糖体 RNA 和一个控制区。基因组组成高度偏向 A+T（68.7%），表现出负的 AT 偏斜（-0.010）和 GC 偏斜（-0.267）。与其他无脊椎动物的线粒体基因组一样，PCGs 以标准的 ATN 起始，以标准的 TAN 密码子或不完整的 T 终止。系统发育分析表明，中华鳖与 Matuta planipes（Matutidae）最为密切相关，这两个物种形成了姐妹分支，构成了 Calappoidea 组，并与部分 Eriphioidea 形成姐妹分支。多系科的存在对传统分类系统提出了质疑。这些结果将有助于更好地了解中华鳖线粒体基因组的特征，并为进一步研究短尾下目内部的进化关系奠定基础。
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