快速而准确的深度学习扫描以寻找基因组中自然选择的签名,使用FASTER-NNN
Sjoerd van den Belt1, Nikolaos Alachiotis2
1University of Twente, Enschede, The Netherlands.
Communications biology
|January 15, 2025
概括
新的卷积神经网络 (CNN) 分类器FASTER-NN精确检测自然选择的特征. 它提供了比现有方法更高的灵敏度和更快的全基因组扫描,即使在复杂的区域.
科学领域:
- 人口遗传学 人口遗传学
- 进化生物学 进化生物学
- 生物信息学是一种生物信息学.
- 计算生物学 计算生物学
背景情况:
- 卷积神经网络 (CNN) 广泛用于人口遗传推断,特别是检测自然选择特征.
- 目前的检测方法优先考虑分类准确性,可能会损害检测精度.
- 优化分类可以阻碍自然选择的准确识别.
研究的目的:
- 介绍FASTER-NN,一种新的CNN分类器,专门设计用于精确检测自然选择.
- 与现有的最先进的方法相比,提高识别自然选择特征的灵敏度和效率.
- 为了应对在重组热点中检测选择的挑战.
主要方法:
- FASTER-NN利用扩展卷积来处理等位基因频率和基因组位置,最大限度地重复使用数据.
- 该架构是针对检测精度而不是仅仅对分类精度进行了优化.
- 该方法的计算效率独立于样本大小和染色体长度.
主要成果:
- 与目前的CNN分类器相比,FASTER-NN在检测自然选择特征方面表现出更高的灵敏度.
- 该分类器在识别选择性扫描中实现了高精度,即使是在重组热点内.
- 执行时间无论样本大小或染色体长度如何,都保持不变,使得大规模的基因组扫描成为可能.
结论:
- FASTER-NN提供了一个更精确和敏感的工具,用于检测人口遗传学中的自然选择.
- 它的计算效率使其适合进行全基因组扫描和分析大型数据集.
- 该方法提高了研究复合热点等具有挑战性的基因组区域的选择的能力.
相关概念视频
02:05Gene Evolution - Fast or Slow?
7.0K
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...
7.0K
02:54Evolutionary Relationships through Genome Comparisons
5.7K
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...
5.7K
03:00Next-generation Sequencing
87.3K
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
87.3K
02:02Genomics
35.8K
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
35.8K