Lan Yi, Sun Jin, Bartlett Douglas H, Rouse Greg W, Tabata Harry G, Qian Pei-Yuan
Division of Life Science, Hong Kong University of Science and Technology, Hong Kong, China.
Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, USA.
Mitochondrial DNA B Resour. 2016 Nov 22;1(1):802-803. doi: 10.1080/23802359.2016.1214549.
is an amphipod that is a dominant animal resident living in the Challenger Deep (∼11,000m depth) of the Mariana Trench, which is the world deepest point in the ocean. Here we report a nearly complete mitochondrial genome of , the world deepest mitogenome. The genome consists of two contigs with lengths of 8,603 bp and 6,984 bp, respectively, and it includes 13 complete protein-coding genes, 2 rRNA genes, and 21 tRNA genes. The ends of both contigs are highly repetitive and AT rich. The gene order of is similar to another amphipod () in the same superfamily, Lysianassoidea. Phylogenetic analysis showed that Lysianassoidea is grouped with Gammaroidea and Calliopioidea in the same clade. Our result also suggested that the collected from Izu-Bonin Trench and Japan Trench are indeed the same species as those from the Mariana Trench. These results will contribute to a better understanding of the phylogeny of amphipod and other hadal species.
是一种生活在世界海洋最深处——马里亚纳海沟挑战者深渊（深度约11000米）的优势栖居动物，属于端足目。在此，我们报道了其近乎完整的线粒体基因组，这是世界上最深的有丝分裂基因组。该基因组由两个重叠群组成，长度分别为8603 bp和6984 bp，包含13个完整的蛋白质编码基因、2个rRNA基因和21个tRNA基因。两个重叠群的末端高度重复且富含AT。的基因排列顺序与同超科的另一种端足目动物（）相似，属于深虾总科。系统发育分析表明，深虾总科与钩虾总科和美人虾总科归为同一进化枝。我们的结果还表明，从伊豆-小笠原海沟和日本海沟采集的与从马里亚纳海沟采集的确实是同一物种。这些结果将有助于更好地理解端足目动物和其他超深渊物种的系统发育。
