西马鲁巴奥布里亚的叶绿体基因组,分子进化和Sapindales内部的比较分析
Marla A Almeida-Silva1,2, Ramilla S Braga-Ferreira1,3, Cíntia P Targueta1
1Laboratório de Genética and Biodiversidade (LGBio), Universidade Federal de Goiás, Goiânia, GO, Brazil.
Scientific reports
|September 12, 2024
概括
这项研究为三种Simarouba物种提供了新的基因组数据,揭示了塑体进化,基因伪基因化,并确定了用于物种歧视的关键DNA条形码区域.
科学领域:
- 基因组学就是基因组学.
- 分子进化分子进化
- 植物科学 植物科学
背景情况:
- 新热带属西马鲁巴 (Simaroubaceae) 缺乏全面的基因组数据.
- 现有的数据库对Simarouba物种的基因组信息有限.
研究的目的:
- 为三种西马鲁巴 (S. amara,S. versicolor,S. glauca) 提供基因组资源.
- 在Sapindales序列内进行比较的分子进化分析.
- 为了阐明塑体进化和识别潜在的DNA条形码区域.
主要方法:
- 从三种Simarouba物种中测序和分析叶绿体基因组.
- 对分子进化进行比较分析.
- 伪基化事件和核酸多样性热点的识别.
- 遗传学分析. 遗传学分析.
主要成果:
- 质体体表现出典型的四部分结构,在psbC,infA,rpl22和ycf1基因中具有伪基因化.
- 在S. amara中,psbC基因因因过早停止codon. amara显著减少.
- 在matK,ycf1,ndhF,rpl32,petA-psbJ和trnS-trnG地区的核酸多样性对物种歧视有希望.
- 在rpl23基因上检测到积极选择.
- 而S. versicolor和S. glauca比S. amara更为密切地相关.
结论:
- 这项研究为Simarouba提供了宝贵的基因组资源.
- 伪基因化事件对西马鲁巴塑料体内的基因功能产生影响.
- 识别的DNA区域可以帮助Simarouba物种和家族层面的识别.
相关概念视频
Comparing 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
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
3.6K
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...
3.6K
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
Anatomy of Chloroplasts
108.6K
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.
108.6K


