相关实验视频
Updated: Jul 20, 2025
08:57
Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
Published on: August 14, 2018
15.9K
phyBWT2:通过eBWT的位置聚类来重建族系
Veronica Guerrini1, Alessio Conte2, Roberto Grossi3
1Dipartimento di Informatica, University of Pisa, Pisa, Italy. veronica.guerrini@unipi.it.
Algorithms for molecular biology : AMB
|August 3, 2023
概括
PhyBWT2从测序数据直接重建了家族遗传树,绕过了对齐和组装. 这种无对齐的方法提高了病毒进化研究的速度并保持了准确性.
科学领域:
- 计算生物学 计算生物学
- 生物信息学是一种生物信息学.
- 进化生物学 进化生物学
背景情况:
- 分子遗传学从生物序列中推断出进化关系.
- 目前的工具通常需要预处理的数据,限制了对原始测序读数的直接分析.
- 越来越需要对齐,组装和无引用方法来分析各种序列数据.
研究的目的:
- 引入phyBWT2,一种用于直接基因树重建的改进方法.
- 为分析序列数据提供一种无对齐,无组合和无引用的方法.
- 为了提高在遗传学分析中的计算效率.
主要方法:
- 使用扩展的Burrows-Wheeler转换 (eBWT) 和位置聚类.
- 在没有先验k-mer固定的情况下检测不同长度的共享子字符串.
- 在没有对对顺序比较或距离矩阵的情况下构建分区树.
主要成果:
- PhyBWT2可以直接从原始阅读,结合或基因组中重建家族遗传树.
- 该方法绕过了基因组对齐或de novo组装的需要.
- 与其前身phyBWT相比,PhyBWT2的运行时间有所改善.
结论:
- PhyBWT2产生了与基准方法相当的品质的家族遗传树.
- 这种方法在各种测序数据类型中有效.
- PhyBWT2提高了性能,同时保持了遗传学推断的准确性.
相关概念视频
02:54Evolutionary Relationships through Genome Comparisons
5.8K
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...
5.8K
03:21Phylogenetic Trees
45.5K
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.
45.5K
01:23Phylogeny
44.4K
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.
44.4K
02:40The Tree of Life - Bacteria, Archaea, Eukaryotes
32.5K
The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
32.5K
02:05Gene Evolution - Fast or Slow?
7.2K
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...
7.2K
01:20Applications of Molecular Taxonomy
41
Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
41