Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Phylogeny01:23

Phylogeny

47.2K
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.
47.2K
Epiphytes, Parasites, and Carnivores02:40

Epiphytes, Parasites, and Carnivores

12.6K
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
12.6K
What is Evolutionary History?02:35

What is Evolutionary History?

31.0K
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.
31.0K
Convergent Evolution01:54

Convergent Evolution

27.6K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
27.6K
Retroviruses02:33

Retroviruses

12.0K
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
12.0K
Synteny and Evolution02:31

Synteny and Evolution

2.9K
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...
2.9K

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

Divergent poxvirus identified in a non-native black rat from Madagascar.

Virology·2026
Same author

Rapid centromere turnover and the adaptive radiation of lemurs.

bioRxiv : the preprint server for biology·2026
Same author

First description of the male and redescription of the female of Ixodes lunatus Neumann, 1907 (Acari: Ixodidae), parasite of tenrecs and rodents in Madagascar.

Systematic parasitology·2026
Same author

Mammal-infecting DNA viruses identified in lemurs and rodents in Madagascar mirror the evolutionary history of their hosts.

Microbial genomics·2026
Same author

Draft assemblies for 177 bird species enhance genus-level coverage.

GigaScience·2026
Same author

Morphological Stasis in Wing Traits Despite Species Diversification in African and Malagasy <i>Miniopterus</i> Bats.

Ecology and evolution·2026

相关实验视频

Updated: Apr 28, 2026

The Madagascar Hissing Cockroach as an Alternative Non-mammalian Animal Model to Investigate Virulence, Pathogenesis, and Drug Efficacy
12:21

The Madagascar Hissing Cockroach as an Alternative Non-mammalian Animal Model to Investigate Virulence, Pathogenesis, and Drug Efficacy

Published on: November 24, 2017

10.5K

马达加斯加肉食动物的单一起源来自一个非洲祖先.

Anne D Yoder1, Melissa M Burns, Sarah Zehr

  • 1Department of Ecology and Evolutionary Biology, Yale University, 165 Prospect Street, New Haven, Connecticut 06551, USA. yoder@yale.edu

Nature
|March 1, 2003
PubMed
概括
此摘要是机器生成的。

马达加斯加的食肉动物起源于一个非洲祖先,这挑战了以前关于多次入侵的理论. 它们在马达加斯加的到来与类动物相隔数百万年,这表明它们是独立的殖民事件.

更多相关视频

Reverse Dissection and DiceCT Reveal Otherwise Hidden Data in the Evolution of the Primate Face
08:15

Reverse Dissection and DiceCT Reveal Otherwise Hidden Data in the Evolution of the Primate Face

Published on: January 7, 2019

6.4K
Analysis of Iophenoxic Acid Analogues in Small Indian Mongoose Herpestes Auropunctatus Sera for Use as an Oral Rabies Vaccination Biological Marker
11:28

Analysis of Iophenoxic Acid Analogues in Small Indian Mongoose Herpestes Auropunctatus Sera for Use as an Oral Rabies Vaccination Biological Marker

Published on: May 31, 2019

5.4K

相关实验视频

Last Updated: Apr 28, 2026

The Madagascar Hissing Cockroach as an Alternative Non-mammalian Animal Model to Investigate Virulence, Pathogenesis, and Drug Efficacy
12:21

The Madagascar Hissing Cockroach as an Alternative Non-mammalian Animal Model to Investigate Virulence, Pathogenesis, and Drug Efficacy

Published on: November 24, 2017

10.5K
Reverse Dissection and DiceCT Reveal Otherwise Hidden Data in the Evolution of the Primate Face
08:15

Reverse Dissection and DiceCT Reveal Otherwise Hidden Data in the Evolution of the Primate Face

Published on: January 7, 2019

6.4K
Analysis of Iophenoxic Acid Analogues in Small Indian Mongoose Herpestes Auropunctatus Sera for Use as an Oral Rabies Vaccination Biological Marker
11:28

Analysis of Iophenoxic Acid Analogues in Small Indian Mongoose Herpestes Auropunctatus Sera for Use as an Oral Rabies Vaccination Biological Marker

Published on: May 31, 2019

5.4K

科学领域:

  • 进化生物学 进化生物学
  • 岛屿生物地理 岛屿生物地理
  • 哺乳动物遗传学 哺乳动物遗传学

背景情况:

  • 马达加斯加拥有四种胎盘哺乳动物,尽管它的海洋隔离.
  • 马达加斯加哺乳动物的起源由于化石记录有限,人们对其了解甚微.
  • 之前的假设表明马拉加斯肉食动物的多次殖民.

研究的目的:

  • 为了确定马拉加斯肉食动物的遗传起源.
  • 为了估计马达加斯加的哺乳动物群体殖民的时间.
  • 测试马达加斯加动物群的单个与多个殖民假设.

主要方法:

  • 马达加斯加食肉动物的多基因遗传学分析.
  • 对食肉动物和类动物的分歧约会的贝叶斯分析.

主要成果:

  • 马达加斯加的食肉动物形成了一个单体群,表明一个单一的祖先殖民事件.
  • 马达加斯加的食肉动物和类动物殖民是几千万年分开的.
  • 遗传学数据驳斥了对这两种哺乳动物群体存在的单一事件解释.

结论:

  • 马拉加斯肉食动物的存在归因于来自非洲祖先的单一殖民.
  • 肉食动物和类动物的独特殖民时间排除了两者单一的代理或分散事件.
  • 了解马达加斯加的哺乳动物生物地理需要考虑多个,暂时分离的殖民事件.