全中心染色体微观进化:从植物地理模式到基因组与环境梯度的关联
José Ignacio Márquez-Corro1,2, Santiago Martín-Bravo1, José Luis Blanco-Pastor3,4
1Departamento de Biología Molecular e Ingeniería Bioquímica, Universidad Pablo de Olavide, Seville, Spain.
Molecular ecology
|October 5, 2023
概括
地理变化和染色体进化推动了植物的多样化. 在Carex中,与环境和迁移模式相关的型变异影响着人口的差异化和适应.
科学领域:
- 进化生物学 进化生物学
- 植物科学 植物科学
- 遗传学 是一个遗传学.
- 生态生态学 生态生态学
背景情况:
- 地理隔离和染色体进化是真核生物多样化的关键驱动因素,特别是在植物中.
- 普莱斯托时代的冰川振荡通过范围的变化影响了植物的进化路径.
- 种类内的型变异性可以通过改变的重组率和链接群体提供适应潜力.
研究的目的:
- 研究植物地理学,染色体进化和生态要求在Carex群的多样化中的作用. laevigata 种类复合体. 类的物种复合体
- 确定这些因素对人口差异化和物种化的相对影响.
- 在具有全中心染色体的生物中探索局部适应和染色体进化之间的联系.
主要方法:
- 使用RADseq来解决进化模式的植物地理分析.
- 景观基因组学用于识别与本地适应相关的位置.
- 细胞遗传学分析用于研究染色体数量变异和型分布.
主要成果:
- 一个得到很好的解决的RADseq族群学揭示了与南向北的冰期后迁移相一致的族群地理模式.
- 景观基因组学确定了当地适应的候选位置.
- 在型和环境变量之间发现了显著的关联,这表明型分布存在环境约束.
结论:
- 在Carex gr.中的型分布. laevigata是由范围转移动态和局部适应形成的.
- 染色体进化在微观进化模式中扮演着重要的角色,在Carex群体中区分和适应的微观进化模式.
- 整体中心染色体变异性是关键因素,将植物的局部适应和染色体进化联系在一起.
相关概念视频
02:31Synteny and Evolution
3.3K
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...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
3.3K
02:54Evolutionary Relationships through Genome Comparisons
5.8K
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...
5.8K
02:16Genetics of Speciation
19.3K
Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
19.3K
02:05Gene Evolution - Fast or Slow?
7.2K
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...
7.2K
02:55The Evidence for Evolution
42.9K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
42.9K
01:39Chromosomal Theory of Inheritance
55.4K
In 1866, Gregor Mendel published the results of his pea plant breeding experiments, providing evidence for predictable patterns in the inheritance of physical characteristics. The significance of his findings was not immediately recognized. In fact, the existence of genes was unknown at the time. Mendel referred to hereditary units as “factors.”
55.4K