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沙鼠的比较线粒体基因组分析及沙鼠亚科(啮齿目:鼠科)的线粒体基因组系统发育。

Comparative Mitogenome Analysis of Gerbils and the Mitogenome Phylogeny of Gerbillinae (Rodentia: Muridae).

机构信息

School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China.

School of Life Sciences, Lanzhou University, Lanzhou, 730000, China.

出版信息

Biochem Genet. 2022 Dec;60(6):2226-2249. doi: 10.1007/s10528-022-10213-8. Epub 2022 Mar 21.

Abstract

To enrich the mitogenomic database of Gerbillinae (Rodentia: Muridae), mitogenomes of three gerbils from different genera, Meriones tamariscinus (16,393 bp), Brachiones przewalskii (16,357 bp), and Rhombomys opimus (16,352 bp), were elaborated and compared with those of other gerbils in the present study. The three gerbil mitogenomes consisted of 2 ribosomal RNA genes, 13 protein-coding genes (PCGs), 22 transfer RNA genes, and one control region. Here, gerbil mitogenomes have shown unique characteristics in terms of base composition, codon usage, non-coding region, and the replication origin of the light strand. There was no significant correlation between the nucleotide percentage of G + C and the phylogenetic status in gerbils, and between the GC content of PCGs and the leucine count. Phylogenetic relationships of the subfamily Gerbillinae were reconstructed by 7 gerbils that represented four genera based on concatenated mitochondrial DNA data using both Bayesian Inference and Maximum Likelihood. The phylogenetic analysis indicated that M. tamariscinus was phylogenetically distant from the genus Meriones, but has a close relationship with R. opimus. B. przewalskii was closely related to the genus Meriones rather than that of R. opimus.

摘要

为了丰富沙鼠科(啮齿目:鼠科)的线粒体基因组数据库,本研究详细阐述了来自三个不同属的三种沙鼠的线粒体基因组,即子午沙鼠(Meriones tamariscinus)(16,393bp)、普氏原羚(Brachiones przewalskii)(16,357bp)和长爪沙鼠(Rhombomys opimus)(16,352bp),并将其与其他沙鼠的线粒体基因组进行了比较。这三种沙鼠的线粒体基因组包括 2 个核糖体 RNA 基因、13 个蛋白质编码基因(PCGs)、22 个转移 RNA 基因和一个控制区。在这里,沙鼠的线粒体基因组在碱基组成、密码子使用、非编码区和轻链复制起点方面表现出独特的特征。沙鼠的核苷酸 G+C 百分比与系统发育地位之间以及 PCGs 的 GC 含量与亮氨酸计数之间没有显著相关性。基于来自四个属的 7 种沙鼠的线粒体 DNA 数据,通过贝叶斯推断和最大似然法构建了沙鼠亚科的系统发育关系。系统发育分析表明,子午沙鼠在系统发育上与子午沙鼠属相距较远,但与长爪沙鼠属关系密切。普氏原羚与子午沙鼠属关系密切,而与长爪沙鼠属关系不密切。

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