Notes on recombination and reassortment in multipartite/segmented viruses

Area of Science:

• Virology
• Computational Biology
• Genomics

Background:

• Viruses evolve via nucleotide substitution, genetic recombination, and genomic reassortment.
• Recombination occurs during co-infection, while reassortment involves genomic components in segmented/multipartite viruses.
• Computational tools exist for studying viral evolution through recombination and reassortment.

Purpose of the Study:

• To review the mechanisms of viral evolution, focusing on recombination and reassortment.
• To discuss the computational techniques used to identify and characterize these evolutionary processes.
• To highlight the challenges posed by recombination and reassortment in studying segmented and multipartite viruses, particularly with metagenomics.

Main Methods:

• Review of existing literature on viral evolution, recombination, and reassortment.
• Analysis of computational approaches for detecting genetic recombination and genomic reassortment.
• Examination of challenges in metagenomic analysis of segmented and multipartite viruses.

Main Results:

• All studied segmented and multipartite viruses exhibit reassortment.
• Recombination is common in many multipartite viruses but rare or absent in segmented viruses.
• Metagenomic analysis of these viruses is complicated by accurate component identification and distinguishing real from artifactual recombination.

Conclusions:

• Recombination and reassortment are significant viral evolution mechanisms.
• Computational methods are crucial for studying these processes but have limitations.
• Accurate analysis of segmented/multipartite viruses using metagenomics requires addressing challenges in genome assembly and event identification.