相关概念视频
03:21Phylogenetic Trees
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.
03:21Phylogenetic Trees
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.
01:23Phylogeny
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.
01:28Microbial Phylogeny
Understanding the evolutionary relationships among microorganisms is fundamental to microbial ecology and taxonomy. Phylogenetic trees are essential tools for inferring these relationships, relying primarily on comparative analyses of molecular sequences such as DNA, RNA, or proteins. In microbial studies, these trees typically depict the evolutionary paths of diverse bacterial and archaeal species by mapping genetic differences accumulated over time.Phylogenetic trees are composed of tips,...
02:54Evolutionary Relationships through Genome Comparisons
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...
01:22Phylogenetic Species Concept in Microbiology
The phylogenetic species concept (PSC) is a framework used to delineate species based on evolutionary relationships, emphasizing shared ancestry and diagnosable genetic traits. Unlike morphological or biological species concepts, the PSC is particularly advantageous for microbial taxonomy, where traditional reproductive or phenotypic criteria often fall short due to the prevalence of asexual reproduction, minimal morphological differentiation, and widespread horizontal gene transfer among...
您也可能阅读
相关文章
通过共同作者、期刊和引用图与本文相关的文章。
排序
Same author
Predicting the depth of the most recent common ancestor of a random sample of k species: the impact of phylogenetic tree shape.
Journal of mathematical biology·2026
Same author
A Dichotomy Law for Certain Classes of Phylogenetic Networks.
Bulletin of mathematical biology·2025
相关实验视频
Updated: May 31, 2026
12:00
A Practical Guide to Phylogenetics for Nonexperts
Published on: February 5, 2014
基因树空间中的露台.
Michael J Sanderson1, Michelle M McMahon, Mike Steel
1Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA. sanderm@email.arizona.edu
Science (New York, N.Y.)
|June 18, 2011
概括
研究人员在进化树重建中发现了新的结构,揭示了类似树的"露台". 这些发现有助于解决遗传学上的模两可,并改进使用序列数据的进化分析.
科学领域:
- 计算生物学 计算生物学
- 进化生物学 进化生物学
- 生物信息学是一种生物信息学.
背景情况:
- 构建物种丰富的系谱对于理解生命之树至关重要.
- 多位元序列数据集通常是不完整的,这给准确的基因结构重建带来了挑战.
研究的目的:
- 描述树木重建的解决方案景观中以前未知的结构.
- 开发方法来表征和改善已识别的结构内的遗传学模两可.
主要方法:
- 对树木重建问题的解决方案景观的分析.
- 开发用于识别最高协议子树的算法.
- 选择最小数组新测序目标的方法.
主要成果:
- 发现了质量相同的树木的"露台",这些树木排列在类遗传学上相似的树木岛上.
- 有效的特征的遗传学模两可在露台.
- 通过最大协议子树或有针对性的测序来改善模糊性的算法.
结论:
- 通过导航识别的解决方案景观,可以理解和管理类遗传学模两可.
- 新的算法可以提高家族遗传树重建的准确性和效率.
