相关实验视频
Updated: Jun 26, 2025

09:40
Novel Sequence Discovery by Subtractive Genomics
Published on: January 25, 2019
8.6K
阿根廷物种的比较叶绿体基因组:基因组进化和基因组学影响
Qin-Qin Li1,2,3, Zhi-Ping Zhang4, Aogan1
1College of Life Science and Technology, Inner Mongolia Normal University, Hohhot, China.
Frontiers in plant science
|May 20, 2024
概括
这项研究使用了比较的叶绿体基因组学来分析Argentina属,揭示了它的单体性质和某些物种之间的密切关系. 它确定了关键的DNA标记物和基因在适应的积极选择下.
科学领域:
- 植物学 植物学
- 基因组学就是基因组学.
- 进化生物学 进化生物学
背景情况:
- 阿根廷属包括大约75个物种,主要分布在中喜马拉雅地区和马来西亚群岛.
- 由于先前的研究有限,人们对阿根廷的族系关系了解甚少.
- 在阿根廷没有进行全面的比较质细胞 (cp) 基因组研究.
研究的目的:
- 为了进行质细胞 (cp) 基因组的比较基因组分析,在属 *阿根廷*.
- 为了澄清 *阿根廷 * 种类的遗传学关系和进化历史.
- 为了确定物种识别和种群遗传学的潜在DNA标记物.
主要方法:
- 对来自18个阿根廷种群的39个cp基因组进行比较分析.
- 检查cp基因组结构,基因含量和顺序.
- 确定受积极选择和候选DNA标记物的区域.
主要成果:
- 39个 *阿根廷* cp 基因组表现出典型的四部分结构 (155,096157,166 bp) 与112个独特的基因.
- 观察到高度保守的cp基因组组织,基因含量和顺序,在IR/SC边界区域有差异.
- 十个地区被确定为优秀的候选DNA标记物,26个基因显示了积极选择的地点,表明适应山区环境.
结论:
- 该属 *阿根廷 * 已被证实为单属.
- 这项研究支持重新分类A. phanerophlebia和A. micropetala从Sibbaldia到阿根廷.
- 这些发现为*阿根廷*分类学,遗传学和适应性进化领域的未来研究提供了基础.
相关概念视频
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
12.4K
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...
12.4K
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
Export of Mitochondrial and Chloroplast Genes
3.7K
A eukaryotic cell can have up to three different types of genetic systems: nuclear, mitochondrial, and chloroplast. During evolution, organelles have exported many genes to the nucleus; this transfer is still ongoing in some plant species. Approximately 18% of the Arabidopsis thaliana nuclear genome is thought to be derived from the chloroplast’s cyanobacterial ancestor, and around 75% of the yeast genome derived from the mitochondria’s bacterial ancestor. This export has occurred...
3.7K
The Anatomy of Chloroplasts
5.1K
Green algae and plants, including green stems and unripe fruit, harbor specialized organelles called chloroplasts to carry out photosynthesis. They coordinate both stages of photosynthesis — the light-dependent reactions and the light-independent reactions. The light-dependent reactions use sunlight to release oxygen and produce chemical energy in the form of ATP and NADPH, and the light-independent reactions capture CO2 and use ATP and NADPH to produce sugar.
Structure of...
Structure of...
5.1K
Genome Size and the Evolution of New Genes
7.9K
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
7.9K

