描述四个完整的线粒基因组的Monolepta物种及其相关的遗传学影响
Rong-Rong Gao1, Qi-Long Lei2, Xu Jin1
1Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, College of Life Sciences, Anhui Normal University, Wuhu 241000, China.
Insects
|January 22, 2024
概括
这项研究对四个新的Monolepta线粒体进行了测序,揭示了Monolepta是非单体的. 线粒基因组数据澄清了Monoleptites部分内的关系,需要进行分类学修订.
科学领域:
- 昆虫学 昆虫学是一门学科.
- 基因组学就是基因组学.
- 人类遗传学 是一个学科.
背景情况:
- 属 *Monolepta *属于Galerucinae亚科,包括700多种.
- 对于分类学上的清晰度来说,了解"单烯石"部分的线粒基因组特征和分类学是至关重要的.
研究的目的:
- 测序和分析四种*Monolepta*物种的完整线粒体基因组 (线粒体基因组).
- 使用线粒基因组数据,研究"单烯"部分内的系遗传关系.
- 为了评估属 *Monolepta*.的单植物.
主要方法:
- 使用高通量测序获得了四个新的*Monolepta*线粒基因组.
- 对线粒基因组结构,基因含量和替代率进行比较分析 (例如, *ND6*, *COI*).
- 用最大概率 (ML) 和贝叶斯推理 (BI) 方法进行了家族遗传学分析,数据集包括*ND1*,15个线粒基因基因和13个蛋白质编码基因氨基酸序列.
主要成果:
- 这四个新的线粒基因组范围在15866至16965个基因组之间,它们具有典型的Coleoptera基因组织 (22个tRNA,13个PCG,2个rRNA,1个控制区域).
- *ND6*基因表现出最高的进化率,而*COI*显示出最低的进化率. 在蛋白质编码基因数据集中没有检测到替代和.
- 遗传学分析证实"Monoleptites"是单ophyletic的,但 *Monolepta *是非单ophyletic的. 根据线粒体基因组数据,新测序的物种与*Paleosepharia*聚集在一起.
- 天线段特征 (2短于3,或2长于3) 显示出复杂的进化模式,表明"天线段2长于3"特征的多个起源在真正的*Monolepta*.
结论:
- 线粒基因组在"Monoleptites"中提供了强大的原始基因分辨率,在超原始基因和物种水平.
- *单属 (Monolepta) 是一个非单属的群体,这表明了重要的分类学问题.
- 为了解决其复杂的进化历史和分类地位,需要对*Monolepta*和相关属进行全面的修订.
相关概念视频
Phylogenetic Trees
45.3K
Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
45.3K
Evolutionary Relationships through Genome Comparisons
5.7K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
5.7K
Gene Evolution - Fast or Slow?
7.1K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
In contrast, regions which code...
7.1K
Phylogeny
44.2K
Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
44.2K
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
12.5K
The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
12.5K
Synteny and Evolution
3.3K
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
3.3K


