SCORPiOs, a Novel Method to Reconstruct Gene Phylogenies in the Context of a Known WGD Event.

Phylogenetic gene trees recapitulate the evolutionary history of genes across species, forming an essential framework for comparative genomic studies. In particular, within the context of whole-genome duplications (WGDs), they serve as a basis to investigate patterns of duplicate gene retention and loss, timing of genome rediploidization, and, more generally, to explore the functional consequences of the duplication in descending species. Yet, despite ever more sophisticated models to describe the evolution of gene sequences, building accurate gene trees remains a challenge in ancient polyploid taxons. WGDs generate complex gene families with many duplicated copies and recurrent gene losses, which complicate this task even more. Here, we describe how to use SCORPiOs, a novel method that leverages synteny conservation to provide more accurate phylogenies in the presence of a known WGD event.