相关实验视频
Updated: May 27, 2025
08:43
Metagenomic Analysis of Silage
Published on: January 13, 2017
18.1K
过去的海洋导航:比较海洋古代沉积物环境DNA的元编码和元基因组学
Luke E Holman1, Giulia Zampirolo1, Richard Gyllencreutz2,3
1Section for Molecular Ecology and Evolution, Globe Institute, University of Copenhagen, Copenhagen, Denmark.
Molecular ecology resources
|February 21, 2025
概括
通过比较古代海洋DNA测序方法,发现生物多样性的显著差异. 枪枪元基因组学提供了比古代海洋沉积物记录的元编码更一致的长期数据.
科学领域:
- 古生物学的古生物学
- 海洋生物学 海洋生物学
- 基因组学就是基因组学.
背景情况:
- 古代海洋生态系统为当前海洋生物多样性变化提供了背景.
- 测序沉积古代DNA (sedaDNA) 提供了高分辨率的历史生物多样性数据.
- 对 sedaDNA 测序方法之间的直接比较是有限的,在多样性指标中产生不确定性.
研究的目的:
- 为了比较metabarcoding和shotgun-metagenomics用于 sedaDNA分析.
- 评估测序方法对长期海洋沉积物记录中的生物多样性指标的影响.
- 澄清古代海洋生物多样性解释的方法影响.
主要方法:
- 分析了来自北海斯卡格雷克的8000年前的海洋沉积物.
- 进行了18S rRNA V9区域元编码.
- 进行了猎枪-元基因组测序 (153-229万读数/样本).
主要成果:
- 在metabarcoding和metagenomics之间存在有限的重叠 (3个metazoan属).
- 在2000年以上的样本中,元编码显示了不一致的检测;元基因组学保持一致.
- 观察到不同的α多样性模式:元基因组学显示丰度下降,元编码显示丰度增加.
- 贝塔多样性模式在很大程度上是相似的,除了metazoan比较.
结论:
- 选择 sedaDNA 测序方法显著影响古代海洋记录中检测到的生物多样性.
- 比起元基因组学,元基因组学提供了比元编码更一致的长期生物多样性数据.
- 在对海洋沉积物核心数据进行生态解释之前,必须考虑方法选择,特别是关于α多样性的选择.
更多相关视频
08:04Use of a Filter Cartridge for Filtration of Water Samples and Extraction of Environmental DNA
Published on: November 25, 2016
25.0K
08:09An Aquatic Microbial Metaproteomics Workflow: From Cells to Tryptic Peptides Suitable for Tandem Mass Spectrometry-based Analysis
Published on: September 15, 2015
8.7K
相关概念视频
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
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