吉诺斯特玛五植物 (Gynostemma pentaphyllum) 的完整线粒体基因组揭示了Cucurbitaceae中的多部分结构和动态进化
Ming Zhu1, Yanping Xie2, Caiyan Chen1
1College of Life Sciences, South China Agricultural University, Guangzhou 510642, China.
Genes
|January 28, 2026
概括
这项研究展示了药用植物Gynostemma pentaphyllum的第一个完整的线粒体基因组,揭示了广泛的RNA编辑和基因转移. 这些发现为Gynostemma和相关的虫提供了宝贵的基因组资源.
科学领域:
- 植物基因组学 植物基因组学
- 分子进化是分子进化的过程.
- 黄瓜科 (Cucurbitaceae) 的一个家族.
背景情况:
- 吉诺斯泰玛五 (Gynostemma pentaphyllum) 是一种药用重要植物,属于科.
- 目前G. pentaphyllum的基因组资源有限.
- 了解其遗传构成对于其利用和保护至关重要.
研究的目的:
- 测序和组装G. pentaphyllum的完整的线粒体基因组.
- 对其基因组结构,基因含量和RNA编辑进行比较分析.
- 为了研究细胞内基因转移 (IGT) 和菜科内的基因组关系.
主要方法:
- 全基因组测序和组装的G. pentaphyllum 线索基因组.
- 比较基因组学分析基因内容,RNA编辑和IGT.
- 使用保存的线粒体基因和合成基因比较的族系学分析.
主要成果:
- 组装了大约324kb的多部分线粒体基因组,其中包含典型的血管精子基因.
- 观察到广泛的C-to-URNA编辑,包括启动和停止编码子的生成.
- 检测到多个来自叶绿体的碎片和活跃的IGT.
- 遗传学分析证实了G. pentaphyllum在Cucurbitaceae中的位置,与亲属相比,它具有显著的结构重组.
- 在特定的基因 (rps1, sdh3, sdh4) 中观察到加速进化,并支持与Thladiantha cordifolia的密切亲缘关系.
结论:
- 这项研究为G. pentaphyllum提供了第一个高分辨率的线粒基因组.
- 鉴定出候选线粒体标记物可以帮助物种鉴定和进化研究.
- 基因组数据将支持Gynostemma和相关的虫种类的育种计划.
相关概念视频
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
15.9K
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...
15.9K
Genome Size and the Evolution of New Genes
9.1K
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.
9.1K
Genome Size and the Evolution of New Genes
3.4K
3.4K
The Evidence for Evolution
48.0K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
48.0K
Genomics
40.4K
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
40.4K
Export of Mitochondrial and Chloroplast Genes
4.2K
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...
4.2K


