Extracting functional trends from whole genome duplication events using comparative genomics.

Area of Science:

• Genomics
• Evolutionary Biology
• Comparative Genomics

Background:

• Explosion of sequenced genomes, including those with whole genome duplication (WGD) events.
• Atlantic salmon (Salmo salar) genome has undergone two WGD events since divergence from amniotes.
• WGD leads to gene family expansion, followed by complex retention and loss patterns.

Purpose of the Study:

• To describe methods for characterizing duplicate gene retention after WGD.
• To present methods for analyzing gene expression divergence in duplicated genes.
• To apply these methods to Atlantic salmon and related species.

Main Methods:

• Development of methods to analyze duplicate gene retention across WGD and smaller-scale duplications.
• Utilizing gene expression divergence data for Atlantic salmon and pike.
• Methods for describing expression divergence patterns in duplicated genes.

Main Results:

• Characterization of duplicate gene retention interplay across multiple duplication events.
• Description of gene expression divergence in Atlantic salmon post-WGD.
• Application of developed methods to analyze genomic and functional data.

Conclusions:

• Expanding genomic and functional data enable enhanced functional inference from large-scale duplicates.
• Recently developed comparative methods improve inference for duplicated genes.
• The study describes novel methods for analyzing duplicate gene evolution and function.