OHNOLOGS v2

OHNOLOGS v2 identifies and catalogs vertebrate ohnologs originating from the two rounds of whole-genome duplication (2R-WGD) and the teleost-specific third round (3R-WGD) by leveraging synteny comparisons across 27 vertebrate genomes to support evolutionary genomic analyses.

Key Features:

• Expanded Genome Coverage: Performs synteny comparisons across 27 vertebrate genomes to refine identification of ohnologs from 2R- and 3R-WGD.
• Phylogenetically Informed Analysis: Accounts for phylogenetic biases in species sampling to represent ohnolog retention across lineages and accommodate lineage-specific genome rearrangements.
• Comprehensive Database: Assembles pairs and families of vertebrate ohnologs into an expanded database for evolutionary genomic analyses.
• Comparative Insights: Reveals retention patterns such as higher retention of 2R-ohnologs in teleost fish compared to mammals and sauropsids, and that 2R-ohnologs in teleosts more often preserve additional 3R-WGD genes, while species with fewer extant genes (e.g., sauropsids) can show equal or higher proportions of ohnolog retention.

Scientific Applications:

• Evolutionary Biology: Enables analysis of how 2R- and 3R-WGD events contributed to vertebrate diversity and complexity.
• Genomics and Genetics: Supports studies of gene retention, genome evolution, and the effects of lineage-specific rearrangements on gene families.
• Development and Disease Research: Facilitates investigation of ohnolog roles in development and disease susceptibility, informing biomedical research.

Methodology:

Implements a synteny comparison approach across multiple genomes to refine identification of ohnologs from 2R- and 3R-WGD while addressing lineage-specific genome rearrangements.