相关实验视频

Updated: May 15, 2025

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Published on: August 14, 2018

在欧洲乌中调和基因树不一致和生物地理

Chyi Yin Gwee^1,2, Dirk Metzler¹, Jérôme Fuchs³

¹Division of Evolutionary Biology, LMU Munich, Planegg-Martinsried, Germany.

Molecular ecology

|April 10, 2025

概括

乌的进化史是复杂的,因为基因流动. 一个单一的色彩基因位点,在性选择下,抵抗了基因同质化,揭示了关键的进化过程.

科学领域:

进化生物学进化生物学
人口遗传学人口遗传学
生物信息学是一种生物信息学.

背景情况:

重建与基因流动分歧的基因谱系的进化历史是具有挑战性的,因为不完整的谱系排序,内进和选择.
欧洲乌杂交区的乌 (Corvus corone) 和乌 (Corvus cornix) 之间的杂交区为研究这些过程提供了一个模型系统.
大多数乌基因组都显示出尸和帽子乌之间的相似性,除了一个主要的色彩位置受性选择的影响.

研究的目的:

为了研究塑造欧洲乌物种复杂的进化过程.
重建生物地理历史,了解基因流动和分歧的模式.
确定特定位置的作用,如颜色位置,在维护物种界限.

主要方法:

乌物种综合体生物地理历史的重建.
分析色域和整个基因组的等位基因共享.
测试内进化模型,评估内进化和重组率之间的关系.

主要成果:

在伊比利亚半岛为乌的普莱斯托时代避难所和在中东为罩乌的避难所塑造了它们的分布.
西欧尸体乌和伊比利亚乌之间在颜色位置的等位基因共享表明,古代祖先抵制了基因流动.
在性选择下,一个单一的颜色位点抵抗了全基因组同质化,而没有任何基因组范围内的障碍.

结论:

在不同的性选择下,很少有大效应的基因位点可以抵抗年轻物种复合体中广泛的基因交换.
人口人口学和生物地理学对于解释基因树不一致性至关重要.
这项研究强调了特定的基因位置如何能够保持分歧,尽管基因流正在进行中.

关键词:

这是基因树,基因树.基因组景观的基因组景观这是一个内进的进攻.差异化的岛屿.隔离与迁移的隔离线区域是线区域.

更多相关视频

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern

Published on: March 8, 2020

Lineage Tracing and Clonal Analysis in Developing Cerebral Cortex Using Mosaic Analysis with Double Markers MADM

Lineage Tracing and Clonal Analysis in Developing Cerebral Cortex Using Mosaic Analysis with Double Markers MADM

Published on: May 8, 2020

相关概念视频

Genetics of Speciation

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.

Evolutionary Relationships through Genome Comparisons

Evolutionary 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...

Phylogeny

Phylogeny

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.

Convergent Evolution

Convergent Evolution

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.

Gene Duplication and Divergence

Gene Duplication and Divergence

The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...

Speciation Rates

Speciation Rates