相关实验视频
Updated: Jun 4, 2025

12:00
A Practical Guide to Phylogenetics for Nonexperts
Published on: February 5, 2014
35.3K
转型简化了家族遗传网络的变化
Johanna Heiss1,2, Daniel H Huson1, Mike Steel3
1Institute for Bioinformatics and Medical Informatics, University of Tübingen, Tübingen, Germany.
Bulletin of mathematical biology
|January 3, 2025
概括
生物学家经常通过将遗传网络转化为树来简化复杂的进化历史. 最低稳定祖先 (LSA) 方法始终总结进化趋势,与其他常见方法不同.
科学领域:
- 进化生物学是进化的生物学.
- 计算型的遗传学学.
- 生物信息学是一种生物信息学.
背景情况:
- 扎根的遗传树是描绘物种进化的标准.
- 树木不能代表诸如杂交或基因转移之类的网状事件.
- 根深蒂固的家族遗传网络提供了一个更准确的进化模型,但它们很复杂.
研究的目的:
- 研究将遗传网络转化为树木的方法.
- 识别满足特定一致性条件的转换.
- 评价不同树总结方法对遗传学网络的适用性.
主要方法:
- 对于树系遗传网络的树转化方法的正式调查.
- 引入一个一致性条件来评估转换.
- 最低稳定祖先 (LSA) 方法和其他常见方法的分析.
主要成果:
- 最低稳定祖先 (LSA) 树方法满足一致性属性.
- 其他一些常用的树转换方法不符合这个条件.
- 引入的新方法也未能满足一致性属性.
结论:
- 该LSA方法提供了一种一致的方式来总结从家族遗传网络的进化趋势.
- 并非所有简化家族遗传网络成树的方法都是可靠的.
- 进一步考虑将其转换为正常网络.
相关概念视频
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
Phylogenetic Trees
45.1K
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.
45.1K
Phylogeny
43.6K
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.
43.6K
Gene 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
Synteny and Evolution
3.2K
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
3.2K
Protein Networks
3.9K
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
3.9K

