purge_dups

purge_dups removes haplotypic duplications and heterozygous overlaps from genome assemblies to improve assembly contiguity and accuracy for downstream analyses such as gene annotation.

Key Features:

• Haplotig and overlap removal: Identifies and eliminates haplotigs (contained duplicate regions) and heterozygous overlaps in genome assemblies.
• Sequence similarity and read depth utilization: Leverages sequence similarity and read depth metrics to detect duplicated regions accurately.
• Automated purging: Performs automated detection and removal of duplicated sequences from the primary assembly.
• Support for long-read and scaffolded assemblies: Operates on assemblies generated with long-read sequencing and scaffolding technologies to address duplication introduced by heterozygosity.
• Implementation: Implemented in C.

Scientific Applications:

• Genome assembly refinement: Improves contiguity of primary genome assemblies for large eukaryotic genomes by removing haplotypic duplication.
• Gene annotation support: Reduces false duplications that can compromise gene annotation accuracy.
• Downstream genomic analyses: Enhances the quality of assemblies used in downstream analyses that require contiguous, non-redundant reference sequences.

Methodology:

Analyzes sequence similarity and read depth to identify haplotigs and heterozygous overlaps, then systematically removes those duplications from the primary assembly.