First Complete Mitochondrial Genome of a Tanaidacean Crustacean (Arctotanais alascensis)
First Complete Mitochondrial Genome of a Tanaidacean Crustacean (Arctotanais alascensis)
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DOI：
10.2108/zs200167
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发表时间：
2021-04
影响因子：
0.9
通讯作者：
K. Kakui;Y. Kano
中科院分区：
文献类型：
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作者：
K. Kakui;Y. Kano
我们提出了一个完整的线粒体基因组序列的Tanaidacean Arctotanais alascensis（Richardson，1899），这是第一个完整的有丝分裂基因组报道从Tanaidacea。有丝分裂基因组长13，988 bp，包含13个蛋白质编码基因和两个核糖体RNA基因（动物有丝分裂基因组的典型基因），以及22个转运RNA中的21个;我们没有检测到异亮氨酸转运RNA（trnI）基因。的基因顺序显着不同的假设的地面模式Pancrustacea;只有四个集群（trnM + nad 2; trnC + trnY + cox 1 + trnL 2 + cox 2; trnD + atp 8 + atp 6 + cox 3; trnH + nad 4 + nad 4l）祖先的存在被保留。在软介类系统发育树重建的有丝分裂基因组数据，基本的关系是勉强支持或不一致的传统的基于形态的分类和最新的系统发育重建从大型转录数据集。在我们的树中，涉及最近分歧的关系得到了更好的支持，这表明完整的有丝分裂基因组序列更适合于软甲介目（可能包括Tanaidacea）的系统发育分析。
We present a complete mitochondrial genomic sequence for the tanaidacean Arctotanais alascensis (Richardson, 1899); this is the first complete mitogenome reported from the order Tanaidacea. The mitogenome is 13,988 bp long and contains 13 protein coding and two ribosomal RNA genes (as is typical for animal mitogenomes), and 21 of 22 transfer RNAs; we did not detect an isoleucine transfer RNA (trnI) gene. The gene order differed markedly from the hypothetical ground pattern for Pancrustacea; only four clusters (trnM + nad2; trnC + trnY + cox1 + trnL2 + cox2; trnD + atp8 + atp6 + cox3; trnH + nad4 + nad4l) ancestrally present were retained. In a malacostracan phylogenetic tree reconstructed from mitogenome data, basal relationships were marginally supported or incongruent with the traditional morphology-based classification and the latest phylogenetic reconstructions from large transcriptomic datasets. Relationships involving more recent divergences were better supported in our tree, suggesting that complete mitogenome sequences are more suitable for phylogenetic analyses within malacostracan orders, presumably including Tanaidacea.