Population genetics and comparative mitogenomic analyses reveal cryptic diversity of Amphioctopus neglectus (Cephalopoda: Octopodidae)
Population genetics and comparative mitogenomic analyses reveal cryptic diversity of Amphioctopus neglectus (Cephalopoda: Octopodidae)
复制标题
群体遗传学和比较线粒体基因组分析揭示了忽略文章鱼（头足类：章鱼科）的隐秘多样性
DOI：
10.1016/j.ygeno.2020.06.036
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发表时间：
2020-11-01
期刊：
影响因子：
4.4
通讯作者：
Sunxie, Feige
中科院分区：
文献类型：
--
作者：
Tang, Yan;Zheng, Xiaodong;Sunxie, Feige
本研究展示了圆章鱼种群的 96 个 cox1 和 76 个 cox3 基因。使用单倍型构建的系统发育树和网络形成了三个不同的谱系。对从群体遗传学中分离出来的两个谱系代表的忽略蚊-a和忽略蚊-b进行线粒体基因组测序，并在基因组水平上与忽略蚊进行比较。文章鱼-a与文章鱼表现出显着差异，主要体现在基因长度、基因间区域和串联重复基序的二级结构上。值得注意的是，两个代表种的线粒体基因组在主要非编码区的不同位置均检测到了两处序列缺失，这是与忽略菌最明显的差异。配对遗传距离和系统发育分析支持(A.ignoreus-a+(A.ignoreus+A.ignoreus-b))的关系。这项研究表明，A.ignoreus-a应被视为该复合体的潜在隐秘物种，而A.ignoreus-b则需要进一步验证才能确定。
This study presented 96 cox1 and 76 cox3 genes of Amphioctopus neglectus populations. Three distinct lineages were formed from phylogenetic trees and networks constructed using haplotypes. Mitogenomes of A. neglectus-a and A. neglectus-b as the representatives of two lineages separated from population genetics were sequenced to compare with A. neglectus at the genome-level. Amphioctopus neglectus-a showed significant differences with A. neglectus, mainly reflected in gene length, intergenic regions and the secondary structure of tandem repeat motifs. Notably, two sequence deletions in mitogenomes of the two representative species were detected in different positions of major non-coding regions, which were the most distinct differences with A. neglectus. Pairwise genetic distances and the phylogenetic analysis supported the relationship of (A. neglectus-a + (A. neglectus + A. neglectus-b)). This study suggested that A. neglectus-a should be considered as a potential cryptic species of this complex, while A. neglectus-b needed further verification to be defined.