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来自土耳其的长尾仓鼠的完整线粒体基因组及其系统发育关系。

Whole mitochondrial genome of long-clawed mole vole (Prometheomys schaposchnikowi) from Turkey, with its phylogenetic relationships.

机构信息

Department of Agricultural Biotechnology, Faculty of Agriculture, Erciyes University, Kayseri, Turkey; Genome and Stem Cell Center (GENKOK), Erciyes University, Kayseri, Turkey.

Department of Biology, Faculty of Art and Sciences, Ondokuz Mayıs University, Samsun, Turkey.

出版信息

Genomics. 2020 Sep;112(5):3247-3255. doi: 10.1016/j.ygeno.2020.06.008. Epub 2020 Jun 6.

Abstract

The mitogenome of Prometheomys schaposchnikowi was characterized for the first time as a circular DNA molecule (16.284 bp), containing 37 coding and 2 non-coding regions. In the mitogenome, ND6 and 8 tRNA genes were encoded on the light chain, while 12 PCGs, 14 tRNAs, 2 rRNAs, D-loop and O were encoded on the heavy chain. The most common initiation codon in PCGs was ATG. As in many mammals, incomplete stop codons in P. schaposchnikowi were in the COX3, ND1 and ND4. Phylogenetic relationships were revealed using Bayesian method and the 13 PCGs. Seven genera (Arvicola, Dicrostonyx, Lasiopodomys, Myodes, Ondatra, Proedromys and Prometheomys) formed a monophyletic group, while Eothenomys, Microtus and Neodon were paraphyletic. P. schaposchnikowi constituted the most basal group within Arvicolinae. Divergence time estimation suggested that P. schaposchnikowi diversified during the Miocene (16.28 Mya). Further molecular studies are needed to test the distinctiveness and diversity of the genus Prometheomys.

摘要

首次对沙氏田鼠的线粒体基因组进行了特征描述,它是一个圆形 DNA 分子(16.284bp),包含 37 个编码区和 2 个非编码区。在线粒体基因组中,ND6 和 8 个 tRNA 基因编码在轻链上,而 12 个 PCGs、14 个 tRNA、2 个 rRNA、D-loop 和 O 则编码在重链上。PCGs 中最常见的起始密码子是 ATG。与许多哺乳动物一样,沙氏田鼠的 COX3、ND1 和 ND4 中存在不完全终止密码子。使用贝叶斯方法和 13 个 PCGs 揭示了系统发育关系。7 个属(黑线姬鼠属、林姬鼠属、大足鼠属、小林姬鼠属、水鼠属、麝鼠属和沙氏田鼠属)形成一个单系群,而东方田鼠属、黑线仓鼠属和新仓鼠属则为并系群。沙氏田鼠属在田鼠亚科中处于最基部的位置。分化时间估计表明,沙氏田鼠属在中新世(16.28Mya)发生了多样化。需要进一步的分子研究来检验沙氏田鼠属的独特性和多样性。

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