ntRoot:ゲノムデータからのヒト祖先の計算推論
René L Warren1, Lauren Coombe1, Johnathan Wong1
1Canada's Michael Smith Genome Sciences Centre, BC Cancer, Vancouver, V5Z 4S6, Canada.
Bioinformatics advances
|December 12, 2025
まとめ
ゲノムシーケンスデータからのヒト祖先の推論のための高速かつ効率的な方法であるntRootを開発しました。このツールは、地理的ラベルと祖先フラクションを正確に予測し、大規模なゲノム研究を支援します。
科学分野:
- ゲノミクス
- 集団遺伝学
- バイオインフォマティクス
背景:
- 正確な祖先情報は、大規模コホート研究にとって非常に重要です。
- 既存の祖先予測メソッドは、ゲノムシーケンスデータに関して計算および入力の複雑さの課題に直面しています。
- シーケンスデータから直接祖先を推論するための効率的でスケーラブルかつ正確なメソッドが必要です。
研究 の 目的:
- 計算上軽量なヒトスーパーポピュレーションレベルの祖先推論メソッドであるntRootを提示します。
- 多様なゲノムデータ型からの迅速かつリソース効率的な祖先推論を可能にします。
- 大規模ゲノム研究における祖先特性評価を推進します。
主な方法:
- 参照ガイド付き、アラインメントフリーの単一ヌクレオチドバリアント検出フレームワークであるntRootを開発しました。
- バリアント参照パネルに対してゲノム入力を効率的にクエリするためにブルームフィルターを利用しました。
- 完全ゲノム、ドラフトアセンブリ、シーケンスデータを含む600以上のヒトゲノムサンプルでテストしました。
主要な成果:
- ntRootは地理的ラベルを正確に予測し、祖先フラクションのADMIXTURE(R² = 0.9567)などの従来のメソッドと高い一致を示します。
- 分析完了時間は効率的です。アセンブリで30分、30倍シーケンスデータで75分です。
- このメソッドは、高解像度の予測でグローバルおよびローカルの両方の祖先推論を提供します。
結論:
- ntRootは、コホート研究におけるスケーラブルで正確、かつリソース効率的な祖先推論の重要なニーズに対応します。
- このメソッドは、ゲノム研究における祖先特性評価のための重要な進歩を提供します。
- ntRootは自由に利用可能であり、その採用と有用性を促進します。
関連する概念動画
Evolutionary Relationships through Genome Comparisons
6.8K
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...
6.8K
Synteny and Evolution
3.7K
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral...
3.7K
Genomics
39.5K
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...
39.5K
Human Genetics
1.4K
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...
1.4K
Genome-wide Association Studies-GWAS
15.2K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
15.2K
Genome Size and the Evolution of New Genes
8.9K
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
8.9K


