在中国对Ardisia (Myrsinoideae,Primulaceae) 进行比较的叶绿体基因组分析,并对遗传学关系和适应性进化产生影响
Jin Zhang1, Yangyang Ning2, Jingjian Li1
1Department of Pharmacognosy, Department of Pharmacy, Guilin Medical University, Guilin, 541199, China.
BMC plant biology
|December 20, 2024
概括
这项研究测序了28个Ardisia质细胞基因组,确定了DNA条形码的可变区域,并揭示了适应积极选择的基因. 这项工作澄清了Ardisia基因组特征,有助于物种识别和进化理解.
科学领域:
- 植物基因组学 植物基因组学
- 分子进化的分子进化.
- 人类遗传学 是一个学科.
背景情况:
- 阿尔迪西亚物种在中国有价值,用于药用和装饰用途.
- 形态相似性和有限的遗传标记挑战了准确的Ardisia物种识别.
- 叶绿体基因组为植物关系和适应提供了洞察力.
研究的目的:
- 为了分析来自中国的28种Ardisia物种的叶绿体基因组.
- 研究Ardisia属内的遗传关系和适应性进化.
- 为了确定物种识别的潜在DNA条形码.
主要方法:
- 测序和分析了20个新的Ardisia质细胞基因组,与8个现有的基因组相结合.
- 进行比较基因组分析,以评估结构性保护和变异.
- 简单序列重复 (SSR) 和高度可变区域的识别.
- 遗传学树的构建和对蛋白质编码基因的选择压力分析.
主要成果:
- 叶绿体基因组在155,088至156,999个基因组之间,基因含量保留.
- 确定了12个高度变化的区域作为潜在的DNA条形码.
- 遗传学分析支持了Bladhia s.l.亚属的划分. 进入了布拉迪亚 (Bladhia) 地区. 和奥登托菲拉.
- 基因rbcL和rpoC2显示出积极选择的证据,可能与适应阴暗环境有关.
结论:
- 澄清了阿尔迪西亚 (Ardisia) 叶绿细胞基因组的基本特征.
- 建立了Ardisia分类和识别的理论基础.
- 提供了关于阿尔迪西亚物种适应性进化的见解.
相关概念视频
02:16Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
12.0K
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...
12.0K
02:54Evolutionary 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
02:05Gene Evolution - Fast or Slow?
7.0K
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...
7.0K
02:31Synteny and Evolution
3.2K
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...
3.2K
03:21Phylogenetic Trees
45.2K
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.
45.2K
02:40The Tree of Life - Bacteria, Archaea, Eukaryotes
32.1K
The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
32.1K