相关实验视频
Updated: Jun 26, 2025

08:57
Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
Published on: August 14, 2018
15.9K
对于新热带木耳属的物种级别的原生学:关于拓学的笔记和未来研究的资源
, Vanessa G Staggemeier1, Bruno Amorim2
1Departamento de Ecologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, 59092-970, RN, Brazil.
American journal of botany
|May 10, 2024
概括
这项研究构建了一个经过验证的Neotropical Myrteae的家族遗传树,揭示了进化关系,并突出了需要进一步研究的领域,以获得更好的生态和进化见解.
科学领域:
- 植物学 植物学
- 进化生物学 进化生物学
- 系统学 系统学 系统学
背景情况:
- (Myrtaceae) 是一个多样化的新热带植物群 (约2700个物种),对生态和进化研究至关重要.
- 它复杂的分类学和不可靠的自动化族系学阻碍了准确的系统研究.
- 准确的系谱对于理解新热带地区的生物多样性至关重要.
研究的目的:
- 为了构建一个分类学验证的分子超级矩阵为新热带的Myrteae.
- 为该组推断一个时间校准的家族遗传树.
- 为了确定分类种和地理区域的采样差距.
主要方法:
- 从两个核和七个塑标记器组装了3909个已发表的和1004个未发表的序列.
- 创建了一个覆盖712个物种的分子超级矩阵 (~28%的Myrteae多样性).
- 推断了一个时间校准的家族遗传树.
主要成果:
- 遗传树在很大程度上反映了塑数据拓,核和塑分区之间存在不一致.
- 大型,物种丰富的属仍然不足样本.
- 东南美洲的代表性很好;西亚马逊,中美洲和加勒比地区的代表性不足.
结论:
- 一个可靠的时间校准的新热带类的遗传树现在可用于生态进化研究.
- 未来的研究应该专注于改进分类学和地理采样.
- 建议调查核/塑数据和杂交/不完整血统分类的作用之间的冲突.
相关概念视频
Phylogeny
43.9K
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.
43.9K
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
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
Pollination and Flower Structure
64.6K
Flowers are the reproductive, seed-producing structures of angiosperms. Typically, flowers consist of sepals, petals, stamens, and carpels. Sepals and petals are the vegetative flower organs. Stamens and carpels are the reproductive organs.
64.6K
The Tree of Life - Bacteria, Archaea, Eukaryotes
32.3K
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...
32.3K
Non-vascular Seedless Plants
64.5K
The diverse plant life on Earth—consisting of nearly 400,000 species—can be divided into three broad categories based on biological characteristics: nonvascular, seedless vascular, and seed plants.
64.5K

