相关实验视频
Updated: May 11, 2025
08:57
Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
Published on: August 14, 2018
15.7K
PlaceMyFossils:一种综合的方法来分析和可视化使用脊柱树的化石的植物遗传位置
Santiago A Catalano1,2,3, Ignacio Escapa4, Kelsey D Pugh2,5,6
1Unidad Ejecutora Lillo, Consejo Nacional de Investigaciones Científicas y Técnicas - Fundación Miguel Lillo, Miguel Lillo 251, 4000 S. M. de Tucumán, Argentina.
Systematic biology
|April 17, 2025
概括
PlaceMyFossils是一个新的工具,可以帮助研究人员使用形态学准确地将化石物种放置在家族遗传树上. 它评估了位置,确定了关键人物,并评估了进化研究的信心.
科学领域:
- 系统学 系统学 系统学
- 古生物学的古生物学
- 进化生物学 进化生物学
背景情况:
- 人们越来越感兴趣将形态学数据与分子遗传学相结合.
- 在将灭绝的或化石物种与碎片形态的遗传树上的挑战.
- 现有的遗传学项目缺乏用于受限搜索的全面评估工具.
研究的目的:
- 介绍PlaceMyFossils,这是一个综合方法来评估查询物种,特别是化石的遗传学位置.
- 确定相关的字符和分区,以实现遗传学定位.
- 评估结果的信心,并定义最佳的分析条件.
主要方法:
- 开发了PlaceMyFossils作为TNT (使用新技术进行树木分析) 软件的交互式脚本.
- 结合了几项分析,以彻底评估植物遗传位置.
- 使用来自针叶树和恐龙的经验数据集进行测试.
主要成果:
- PlaceMyFossils提供了对化石物种的遗传学位置的全面评估.
- 确定了影响位置的关键字符和分区.
- 与现有工具相比,证明了实用性和性能.
结论:
- PlaceMyFossils是将形态和分子数据整合到系统学中的一个有价值的工具.
- 它为实证系统主义者提供了一个强大的资源,特别是那些与化石工作的人.
- 该工具有可能推进形态进化研究和理解多样化.
相关概念视频
03:21Phylogenetic Trees
44.8K
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.
44.8K
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
01:23Phylogeny
43.3K
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.
43.3K
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
02:35What is Evolutionary History?
35.9K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
35.9K
02:40The Tree of Life - Bacteria, Archaea, Eukaryotes
31.7K
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...
31.7K