IMAGE

IMAGE applies iterative mapping and local assembly of Illumina paired-end reads to close gaps in draft genome assemblies and improve assembly continuity for downstream genomic analyses.

Key Features:

• Iterative mapping and assembly: Performs iterative mapping of Illumina paired-end reads to contig ends followed by local assembly to extend contigs and reduce gaps.
• Gap closure using Illumina paired-end reads: Leverages paired-end read alignments against contig ends to identify reads that span gap regions for extension.
• Local assembly for gap-spanning contigs: Conducts local de novo assembly at identified gap regions to generate contiguous sequences that bridge discontinuities.
• Use of existing sequencing data: Improves draft genome assemblies using existing Illumina paired-end data without requiring additional sequencing.

Scientific Applications:

• Comparative genomics: Enhances assembly contiguity to support genome-wide comparisons between species or strains.
• Functional annotation: Improves sequence continuity for more accurate gene prediction and annotation.
• Evolutionary biology: Reduces assembly fragmentation to facilitate analyses of genomic structure and evolutionary processes.

Methodology:

Iterative mapping of Illumina paired-end reads to contig ends, identification of reads spanning gaps, and local de novo assembly of gap-spanning reads to extend contigs via repeated mapping-and-assembly cycles.