线粒基因组在淡水类动物的年轻非模型适应性辐射中并没有显著改善基因组分辨率
Björn Stelbrink1,2, Thomas von Rintelen3, Ristiyanti M Marwoto4
1Justus Liebig University Giessen, Giessen, Germany. bjoern.stelbrink@allzool.bio.uni-giessen.de.
BMC ecology and evolution
|April 8, 2024
概括
使用全基因组测序生成的苏拉威西淡水牛的线粒基因组没有完全解决这个古老的湖泊物种群中的物种界限. 尽管有丰富的数据,内向和快速多样化限制了家族遗传分辨率,类似于单位标记物.
科学领域:
- 进化生物学是进化的生物学.
- 基因组学就是基因组学.
- 马拉科学是 Malacology 的一个学科.
背景情况:
- 古代湖泊生态系统拥有显著的分类学和形态学多样性,通常是由物种群中的适应性辐射驱动的.
- 线粒体DNA条形编码对于理解年轻物种组合中的关系至关重要.
- 下一代测序 (NGS) 为非模型生物提供全基因组数据.
研究的目的:
- 构建一个全面的线粒基因组数据集苏拉韦西淡水.
- 评估线粒基因组对年轻物种群体内遗传学解决的贡献.
- 评估全基因组测序对无脊椎动物群体的有用性.
主要方法:
- 78个个体的低覆盖全基因组测序,包括来自马利利湖系统和其他苏拉威西湖的27个Tylomelania形态物种.
- 对一个全面的线粒基因组数据集的分析.
- 遗传学分析以与单位遗传学进行比较.
主要成果:
- 在线粒基因组中确定了大量的可变和节信息网站.
- 由此产生的分类学显示出高度的整体支持,但与之前的单位研究在很大程度上一致.
- 几个类仍然未解决,许多物种是多种类的,表明快速多样化和线粒体内侵袭.
结论:
- 线粒基因组,尽管有大量的数据,但在家族遗传学分析中,它们的功能类似于单个位点.
- 在快速多样化和内进的谱系中解决物种界限仍然具有挑战性,即使有线粒基因组数据.
- 线粒体内侵入显著影响年轻物种群的基因组分辨率.
相关概念视频
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
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
Genome Size and the Evolution of New Genes
8.0K
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.
8.0K
Phylogenetic Trees
45.3K
Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.
45.3K
Phylogeny
44.0K
Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
44.0K
Multi-species Conserved Sequences
3.9K
Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
3.9K


