相关实验视频
Updated: Jan 24, 2026

22:27
Hi-C: A Method to Study the Three-dimensional Architecture of Genomes.
Published on: May 6, 2010
411.6K
第一个完整的叶绿体基因组Lycium shawii:基因组架构,分子遗传学和进化见解
Manal Mohammed Ahmed Asiri1, Mohammad Ajmal Ali1, Mona Solaiman Alwahibi1
1Department of Botany and Microbiology College of Science, King Saud University Riyadh Saudi Arabia.
Ecology and evolution
|January 23, 2026
概括
医学植物Lycium shawii的第一个完整的叶绿体基因组被测序. 这为其分子识别,进化研究和DNA条形码应用提供了有价值的数据.
科学领域:
- 基因组学就是基因组学.
- 植物科学 植物科学
- 分子生物学分子生物学
背景情况:
- 沙维是一种来自沙特阿拉伯的抗压药用植物,用于传统医学.
- 它的生物活性化合物是有价值的,但它的叶绿体基因组以前没有被描述.
- 缺少基因组数据限制了分子识别和遗传学研究.
研究的目的:
- 为了测序和表征Lycium shawii.的完整质体 (Cp) 基因组.
- 为分子识别和植物遗传学分析提供基因组资源.
- 为了研究基因组结构,基因含量,重复和核酸多样性.
主要方法:
- 全基因组测序和Lycium shawii 叶绿体基因组的组装.
- 基因注释,包括蛋白质编码基因,tRNA和rRNA.
- 比较基因组学,重复分析 (SSR,寡核酸重复),RNA编辑部位识别和核酸多样性分析.
- 遗传学重建和分子约会.
主要成果:
- 完整的Lycium shawii Cp基因组是155,936个基因组,在Solanaceae中保留了结构.
- 标注了128个基因;确定了40个SSR和50个寡核酸重复.
- 对DNA条形码进行识别的超变位点 (atpI,rbcL,accD) 被确定.
- 遗传学分析将L.shawii置于Lycieae部落中,出现约1.40 MYA.
结论:
- 介绍了Lycium shawii的第一个完整的叶绿体基因组.
- 这个资源增强了Solanaceae中的分子识别,进化见解和比较基因组学.
- 已识别的超变区为强大的DNA条形码提供了潜在的潜力.
相关概念视频
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
15.4K
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...
15.4K
Evolutionary Relationships through Genome Comparisons
6.9K
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...
6.9K
Genomics
39.8K
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...
39.8K
What is Evolutionary History?
43.0K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
43.0K
Genomic Imprinting and Inheritance
36.9K
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
36.9K
Genome Size and the Evolution of New Genes
9.0K
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.
9.0K

