基因组选择和过门共同影响基因组分析
Jessica A Rick1, Chad D Brock2, Alexander L Lewanski3
1School of Natural Resources & the Environment, University of Arizona, Tucson, AZ 85719, USA.
Systematic biology
|October 26, 2023
概括
选择基因组数据处理的参考基因组显著影响了遗传学推断. 严格的过可以偏向进化树,突出了在比较生物学中需要谨慎的生物信息选择的需要.
科学领域:
- 基因组学就是基因组学.
- 生物信息学是一种生物信息学.
- 进化生物学 进化生物学
背景情况:
- 分子系谱对于理解多样化,特征进化和生物地理学至关重要.
- 基因组数据处理可以在遗传学分析中引入偏见.
- 参考基因组选择和生物信息参数相互作用对遗传学推断的影响尚未得到充分理解.
研究的目的:
- 调查参考基因组选择如何影响遗传学推断.
- 检查参考基因组选择,生物信息选和遗传学方法之间的相互作用.
- 评估不同过策略对遗传学准确性的影响.
主要方法:
- 利用模拟和经验性基因组数据集.
- 在不同的参考基因组和生物信息过参数下分析了遗传学推断.
- 评估了树的拓,不平衡和重心.
主要成果:
- 更严格的小等位基过器 (MAC) 偏差推断树远离真正的物种拓.
- 对于51个taxa数据集,MAC>3-4过器实现了最佳的拓精度.
- 过缺失的数据提高了拓准确性,但可能会扭曲突变光谱.
结论:
- 参考基因组选择是一个关键的生物信息学决定,对遗传学分析有下游影响.
- 生物信息过选择,特别是小等位基过器,显著影响了家族遗传推断的准确性.
- 组装和过基因组数据的最佳方法取决于研究系统和数据集属性.
相关概念视频
Evolutionary 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
Gene Evolution - Fast or Slow?
7.1K
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...
7.1K
Phylogeny
44.2K
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.
44.2K
Modern Molecular Taxonomy
26
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...
26
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
12.5K
The present-day mitochondrial and chloroplast genomes have retained some of the characteristics of their ancestral prokaryotes and also have acquired new attributes during their evolution within eukaryotic cells. Like prokaryotic genomes, mitochondrial and chloroplast genomes neither bind with histone-like proteins nor show complex packaging into chromosome-like structures, as observed in eukaryotes. Unlike mitotic cell divisions observed in eukaryotic cells, mitochondria and chloroplasts...
12.5K
Phylogenetic Trees
45.4K
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.
45.4K


