在Actinidia deliciosa种植的比较叶绿体基因组学:对积极选择和种群演变的洞察
Xiaojing He1, Yang Yang1, Xingya Zhang1
1Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, Xi'an 710069, China.
International journal of molecular sciences
|May 14, 2025
概括
测序了七种Actinidia deliciosa品种的叶绿体基因组,揭示了结构变异和遗传标记. 这些发现提供了关于果进化和适应的见解.
科学领域:
- 植物基因组学 植物基因组学
- 进化生物学是进化的生物学.
- 分子遗传学 分子遗传学
背景情况:
- 叶绿体基因组对于理解植物进化至关重要.
- 秋 (Actinidia deliciosa) 是一个重要的水果作物.
- 之前的研究缺乏对果品种的详细基因组洞察力.
研究的目的:
- 测序和分析七种Actinidia deliciosa品种的完整叶绿体基因组.
- 为了识别结构变异和种群进化特征.
- 为未来的遗传研究发现潜在的分子标记物.
主要方法:
- 七种Actinidia deliciosa品种的整体叶绿体基因组测序.
- 对结构变异,简单序列重复 (SSR) 和重复序列的生物信息分析.
- 种群遗传学分析和特定地点选择分析.
主要成果:
- 叶绿体基因组大小在156,404至156,495个基因组之间.
- 确定了321个SSR和1335个重复序列,可能导致分子变异.
- 检测到四个多态位点 (atpF-atpH,atpH-atpI,atpB,accD) 和六个正在选择中的基因 (atpA,rps3,rps7,rpl22,rbcL,ycf2).
- 阿克丁尼迪亚美味的品种形成了一个独特的进化分支.
结论:
- 这项研究为Actinidia deliciosa.提供了一个基本的基因组资源.
- 鉴定了关键基因和多态位点,用于未来的人口遗传学和进化研究.
- 结果有助于理解果的适应性进化和遗传改进.
相关概念视频
02:16Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
11.9K
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...
11.9K
02:54Evolutionary Relationships through Genome Comparisons
5.6K
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...
5.6K
02:19Export 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
02:05Gene Evolution - Fast or Slow?
7.0K
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...
7.0K
01:07Anatomy of Chloroplasts
108.2K
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.
108.2K
02:02Genomics
35.3K
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...
35.3K