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研究方法:ZOTU 与 OTU 和 ASV 的比较

特性 OTU(97% 聚类) ZOTU(UNOISE3) ASV(DADA2/Deblur)
定义方法 相似性聚类(阈值依赖) 100% 相似性,基于去噪 精确去噪,单碱基分辨率
分辨率 较低,可能合并相似物种 高,可区分单碱基差异 高,可区分单碱基差异
嵌合体处理 可能保留部分嵌合体 自动检测并移除嵌合体 自动检测并移除嵌合体
跨项目可比性 受阈值和工具影响 高,基于精确序列定义 高,基于精确序列定义
计算需求 较低 中等 较高
常用工具 VSEARCH、USEARCH、Mothur UNOISE3(USEARCH) DADA2、Deblur、QIIME 2
去噪方法 不去噪(基于聚类) 去噪(规则和经验方法) 去噪(统计模型)

Operational Taxonomic Units:OTUs

Amplicon Sequence Variants:ASVs, also known as Exact Sequence Variants (ESVs)

zero-radius OTUs:ZOTUs

bioinformatics pipeline

bmc

Li Z, Zhao W, Jiang Y, et al. New insights into biologic interpretation of bioinformatic pipelines for fish eDNA metabarcoding: A case study in Pearl River estuary[J]. Journal of Environmental Management, 2024, 368: 122136.

Hakimzadeh A, Abdala Asbun A, Albanese D, et al. A pile of pipelines: An overview of the bioinformatics software for metabarcoding data analyses[J]. Molecular Ecology Resources, 2024, 24(5): e13847.

cd Docker/
docker build -t edna ./

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