遗传学解决了快速辐射马蝙蝠 (Rhinolophus) 的深层遗传学不确定性和杂交
Shanxiu Yang1, Haixin Zhang1, Jinjin Xie1
1School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China.
Molecular ecology
|November 18, 2025
概括
解决蝙蝠的进化是很困难的. 新的基因组数据揭示了两大蝙蝠群体,并显示基因流动或内进,帮助蝙蝠抵抗病毒.
科学领域:
- 进化生物学是进化的生物学.
- 基因组学就是基因组学.
- 生物信息学是一种生物信息学.
背景情况:
- 遗传学重建对于理解进化历史和生物地理学至关重要.
- 快速辐射事件,如蝙蝠属Rhinolophus,由于有限的数据和分类采样,对解决物种级别的族系提出了挑战.
- 之前的研究缺乏全面的数据来识别Rhinolophus.的祖先类.
研究的目的:
- 解决快速多样化的蝙蝠属Rhinolophus的深层进化关系.
- 研究内向性在Rhinolophus.的多样化和适应中的作用.
- 使用全基因组数据识别Rhinolophus中的祖先类和主要类.
主要方法:
- 利用了全基因组的核数据集,并采用了全面的分类样本.
- 采用了基于连接和凝聚的家族遗传重建方法.
- 进行了PhyloNet分析,以解释基因流和基因组规模内向分析.
主要成果:
- 强有力的恢复了两个姐妹类:Rhinolophus中的非洲-古北极和亚洲类.
- 解决了Rhinolophus hipposideros作为Afro-Palaearctic clade的祖先血统的问题.
- 观察到显著的线粒细胞核异调,表明广泛的历史内进,包括抗病毒基因的自适应内进 (RANBP2,SERINC3).
结论:
- 基因组规模的数据对于解决快速辐射群体的深层进化关系具有强大作用.
- 杂交和内进是推动哺乳动物多样化和适应的重要机制,特别是病毒耐药性.
- 这项研究为Rhinolophus提供了一个强大的遗传学框架,并突出了内进化的进化影响.
相关概念视频
02:54Evolutionary Relationships through Genome Comparisons
6.8K
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...
6.8K
01:54Convergent Evolution
31.3K
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.
31.3K
01:20Applications of Molecular Taxonomy
489
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...
489
01:29Modern Molecular Taxonomy
554
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
554
01:23Phylogeny
56.6K
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.
56.6K
03:21Phylogenetic Trees
49.1K
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.
49.1K