在Triumfetta (Grewioideae,Malvaceae) 中的叶绿体基因组的分子进化
Rushan Yan1,2, Yujie Zeng1,2, Chengyu Chen1,2
1State Key Laboratory of Chinese Medicine Modernization, Tianjin University of Traditional Chinese Medicine, Tianjin, 301617, China.
Planta
|August 14, 2025
概括
这项研究揭示了Triumfetta的叶绿体基因组进化,确定了未来研究的关键遗传标记. 研究结果显示,非洲,亚洲和澳大利亚的Triumfetta物种具有不同的进化路径.
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:
- 马尔瓦科 (Malvaceae) 的Triumfetta属是一个多样化的泛热带群体,有未研究的叶绿体 (cp) 基因组.
- 了解cp基因组进化对于解决属内遗传学关系至关重要.
研究的目的:
- 研究 Triumfetta 属内的进化动态和遗传学关系.
- 为了重新组装和分析八种Triumfetta物种的完整cp基因组.
主要方法:
- 八个Triumfetta完整的叶绿体基因组的新组装.
- 对基因组结构,内容和重复结构进行比较分析.
- 使用组装的cp基因组进行了家族遗传学分析.
主要成果:
- 叶绿体基因组范围从160,075到160,604 bp,编码了112个独特的基因.
- 鉴定了Triumfetta tomentosa的反转和六个基因在积极选择下.
- 发现了十个适用于DNA条形码和种群遗传学的多态位点.
- 遗传学分析证实,Triumfetta是单属的,与Corchorus密切相关,有两个截然不同的群体反映了生物地理差异.
结论:
- 这项研究提供了对Triumfetta cp基因组变异和演变的首次见解.
- 已识别的多态位点为分子标记物开发提供了宝贵的资源.
- 遗传学发现揭示了该属内明显的生物地理分裂,非洲/亚洲和澳大利亚物种形成了单独的分类.
相关概念视频
02:16Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
13.4K
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...
13.4K
02:19Export of Mitochondrial and Chloroplast Genes
3.8K
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...
3.8K
01:08The Anatomy of Chloroplasts
5.7K
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...
5.7K
02:54Evolutionary Relationships through Genome Comparisons
6.1K
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...
6.1K
01:07Anatomy of Chloroplasts
111.5K
Green algae and plants, including green stems and unripe fruit, harbor chloroplasts—the vital organelles where photosynthesis takes place. In plants, the highest density of chloroplasts is found in the mesophyll cells of leaves.
111.5K
02:05Gene Evolution - Fast or Slow?
7.4K
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...
7.4K