G-Anchor: a novel approach for whole-genome comparative mapping utilizing evolutionary conserved DNA sequences

Area of Science:

• Genomics
• Bioinformatics
• Comparative Genomics

Background:

• Whole-genome sequence alignment is crucial for comparative genomics but computationally intensive.
• The increasing number of sequenced animal genomes drives demand for efficient analysis tools.
• Current methods often require high-performance computing, limiting accessibility.

Purpose of the Study:

• To introduce G-Anchor, a novel pipeline for fast and efficient cross-species genome anchoring.
• To enable rapid mapping of de novo assembled genomes to reference genomes.
• To make whole-genome comparisons accessible to researchers with limited computational resources.

Main Methods:

• G-Anchor utilizes a limited set of highly conserved DNA sequence elements as anchors.
• These anchors are aligned between two genomes to facilitate mapping.
• The pipeline maps scaffolds from a de novo assembled genome to a reference species' chromosome assembly.

Main Results:

• G-Anchor successfully anchors vertebrate genomes to related reference species.
• Anchoring is achieved on a desktop computer within hours with high accuracy.
• Performance is comparable to highly accurate whole-genome alignment tools like LASTZ.

Conclusions:

• G-Anchor is a ready-to-use tool for pairwise vertebrate genome anchoring.
• It is suitable for large, conserved, and non-repetitive genomes.
• G-Anchor provides fast and accurate initial genome comparisons, complementing existing whole-genome alignment software.