进化流动性和MORFFO基因的遗传动力学:在古老的植物系中穿
Paulo H Labiak1,2, Li-Yaung Kuo3, Blake D Fauskee4
1Departamento de Botânica, Universidade Federal do Paraná, Caixa Postal 19031, 81531-980, Curitiba-PR, Brazil.
The New phytologist
|February 19, 2026
概括
的塑基因组 (塑体) 由于移动蛋白质编码基因 (MORFFOs) 而具有动态性. 这些移动元素可以独立复制和水平转移,挑战塑体稳定性.
科学领域:
- 植物基因组学 植物基因组学
- 分子进化的分子进化.
- 生物学 生物学
背景情况:
- 陆地植物的塑基因组 (塑体) 在结构和基因含量方面通常是稳定的.
- 然而,的塑体体表现出不寻常的活力,尤其是移动蛋白质编码基因 (CDS),称为器官中的移动开放阅读框架 (MORFFOs).
研究的目的:
- 为了研究MORFFOs在30个Anemiaceae类物种的进化动态.
- 分析MORFFO转换,替代模式,代码的使用和RNA编辑.
- 了解MORFFO移动性对皮质体进化的影响.
主要方法:
- 在30个Anemiaceae物种中对MORFFOs和正规塑CDS进行了家族遗传学分析.
- 移动窗口和子使用分析,以评估MORFFOs的选择压力.
- 替代率和基因位置的比较分析.
主要成果:
- 形态生物显著扩大的塑体大小,并且在各种基因间区域中发现.
- 与其他塑体CDS相比,MORFFOs表现出动态的位置和谱系,具有异常高的替代率.
- 尽管突变率很高,但MORFFOs显示出净化选择和独特的编码体偏好的证据,这表明功能约束.
- MORFFOs与其他塑体CDS之间的遗传学不一致表明了塑体外的潜在复制.
结论:
- 形态生物是能够独立转录,翻译和复制的移动基因元素.
- 类塑体可能通过频繁的水平和细胞内基因转移获得MORFFO.
- 甲状腺形态生物 (MORFFOs) 代表了一种新的活力来源,以及在青草塑体内潜在的自私遗传元素.
相关概念视频
Gene Flow
38.2K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
38.2K
Mutation, Gene Flow, and Genetic Drift
64.8K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
64.8K
Genetics of Speciation
22.0K
Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
22.0K
Overview of Transposition and Recombination
19.6K
Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
19.6K
Gene Evolution - Fast or Slow?
8.3K
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...
8.3K
Gene Evolution - Fast or Slow?
3.7K
3.7K


