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The complete mitochondrial genomes of two octopods of the eastern Pacific Ocean: Octopus mimus and 'Octopus' fitchi (Cephalopoda: Octopodidae) and their phylogenetic position within Octopoda.
Molecular Biology Reports ( IF 2.8 ) Pub Date : 2019-11-22 , DOI: 10.1007/s11033-019-05186-8
Erika Magallón-Gayón 1 , Miguel Ángel Del Río-Portilla 1, 2 , Irene de Los Angeles Barriga-Sosa 1
Affiliation  

The complete mitochondrial genomes of two important octopus species from the eastern Pacific were sequenced, obtaining their complete nucleotide sequences. Octopus mimus is the most important commercially catched species along the eastern Pacific, from Mexico to Chile, whereas 'Octopus' fitchi is a pigmy species with uncertain taxonomic genus. The mitogenomes of Octopus mimus and 'Octopus' fitchi were 15,696 and 15,780 base pairs (bp) in length with an A + T composition of 75.5% and 75.8%, respectively. Each genome contains 13 protein-coding genes, 22 tRNA genes, and two rRNA genes, as well as a control region. Gene order is maintained as reported for other species of the Octopodidae. The phylogenetic analysis based on the concatenated thirteen protein-coding genes confirms that O. mimus belongs to the genus Octopus, which is supported by the genetic distance (11-16%) whereas the position of 'O'. fitchi within this group it is not supported. The analysis also indicated that the phylogenetic position of 'O'. fitchi is closer to Callistoctopus than to the Cistopus or the Amphioctopus clades. Based on the tree topology and the high genetic distance observed (24-25%), we suggest that 'O'. fitchi might represent a different genus.

中文翻译:

东部太平洋的两个章鱼的完整线粒体基因组:章鱼和“章鱼”飞鱼(Cephalopoda:章鱼科)及其在章鱼内的系统发生位置。

对来自东太平洋的两个重要章鱼物种的完整线粒体基因组进行了测序,获得了它们的完整核苷酸序列。八达通是从墨西哥到智利,东太平洋沿岸最重要的商业捕捞物种,而“章鱼”菲奇则是具有不确定生物分类属的猪物种。章鱼和章鱼的有丝分裂基因组长度为15696和15780个碱基对(bp),A + T组成分别为75.5%和75.8%。每个基因组包含13个蛋白质编码基因,22个tRNA基因和两个rRNA基因,以及一个控制区。基因顺序得以保持,如其他八足类的报道。根据串联的13个蛋白质编码基因进行的系统发育分析证实,O。mimus属于章鱼属,这是由遗传距离(11-16%)支持的,而“ O”的位置。不支持该组中的fitchi。分析还表明“ O”的系统发生位置。fitchi比Cistopus或Amphioctopus进化枝更接近Callistoctopus。基于树的拓扑结构和观察到的高遗传距离(24-25%),我们建议使用“ O”。fitchi可能代表不同的属。
更新日期:2020-01-14
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