SubPhaser

SubPhaser phases subgenomes in complex polyploid and hybrid plant genomes—including neoallopolyploids and homoploid hybrids—by identifying subgenome-specific k-mers to assign homoeologous chromosomes without requiring ancestral diploid references.

Key Features:

• Subgenome-specific k-mer detection: Searches for and identifies subgenome-specific k-mers within genome sequence data.
• Homoeolog assignment: Assigns homoeologous chromosomes to their corresponding subgenomes using identified k-mers.
• Annotation and sequence investigation: Annotates and enables investigation of specific sequences identified as subgenome-specific.
• Reference-free phasing: Performs phasing without known or extant diploid ancestral references.
• Performance characteristics: Demonstrated high accuracy, sensitivity, and performance when subgenome-specific sequences are present.
• Taxon examples and limitations: Effective in species such as wheat for delineating subgenomic structure and less effective for autopolyploids like alfalfa that lack subgenome-specific sequences.

Scientific Applications:

• Subgenome phasing in neoallopolyploids and homoploid hybrids: Enables assignment of homoeologs to subgenomes in neoallopolyploids and homoploid hybrids containing subgenome-specific sequences.
• Genome evolution studies: Facilitates analysis of polyploid genome architecture and evolutionary history.
• Genetic and epigenetic mechanism investigation: Supports study of genetic and epigenetic mechanisms underlying polyploid species.
• Agricultural genomics: Applied to delineate subgenomic structure in crop species such as wheat.

Methodology:

Searches genome data for subgenome-specific k-mers, uses those k-mers to assign homoeologous chromosomes to subgenomes, and annotates the identified sequences for further investigation.