桑尼库拉L. (Apiaceae) 属的家族形成和多样化:从塑基因组分析中获得的新见解
Bo-Ni Song1, Chang-Kun Liu1, An-Qi Zhao1
1Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China.
BMC plant biology
|January 23, 2024
概括
这项研究对15个Sanicula塑体进行了测序,揭示了保存的结构,并确定了12个DNA条形码用于物种识别. 遗传学分析提供了对属的进化历史和关系的见解.
科学领域:
- 植物基因组学 植物基因组学
- 人类遗传学 是一个学科.
- 进化生物学是进化的生物学.
背景情况:
- 桑尼库拉属 (Sanicula L.) 是一种具有医学意义的多年草,其分类学和进化史尚未解决,特别是中国的特有物种.
- 塑基因组提供了一种宝贵的工具,用于植物的基因因,因为它们的保存结构和有限的进化速度.
研究的目的:
- 用全面的塑基因组学阐明 Sanicula 属内的进化历史和遗传学关系.
- 为了识别潜在的DNA条形码,用于Sanicula属内的物种识别.
主要方法:
- 测序和组装十五个新的Sanicula完整塑体,结合两个之前报告的塑体.
- 对17个Sanicula塑料体进行结构保护,基因顺序和序列相似性的比较分析.
- 用塑体数据和内部转录间隔器 (ITS) 序列进行了基因组学重建.
- 分子约会以估计Sanicula属的起源和多样化时间.
主要成果:
- 十七个Sanicula塑体在结构,大小,GC含量,基因顺序和IR边界方面表现出高度的保存.
- 12个特定的突变热点被确定为Sanicula物种识别的潜在DNA条形码.
- 遗传学分析支持Saniculoideae和Apioideae的单一性,表明它们之间存在姐妹群关系.
- 桑尼库拉属起源于晚期伊欧纪 (大约. 37.84万年前) 和多样化在早期的米奥生 (约. 18.38 Ma) 的时间.
结论:
- 质体数据显著增强了遗传学分辨率,并支持对Sanicula属进化历史的洞察.
- 塑体和ITS树之间的不一致可能是由于杂交,不完整的血统分类或质塑料捕获造成的.
- 桑尼库拉的多样化受到了东亚季风的流行和恒杜安山脉的升起的影响.
相关概念视频
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
Phylogeny
44.1K
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.
44.1K
Formation of Species
39.3K
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
39.3K
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
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
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


