Homoeologous chromosome pairing across the eukaryote phylogeny

Area of Science:

• Evolutionary Biology
• Genetics
• Systematics

Background:

• Molecular phylogenetics has advanced eukaryotic evolutionary relationship mapping.
• Systematics is shifting focus from species relationships to trait evolution.
• Knowledge gaps exist in the evolution of key traits, especially in non-model lineages.

Purpose of the Study:

• To examine the evolution of homologous chromosome pairing regulation across eukaryotes.
• To illustrate knowledge disparities in this trait, particularly in non-model taxa.
• To provide an overview of meiotic aberrations and their impact on homolog recognition.

Main Methods:

• Review of homologous chromosome pairing regulation in model eukaryotes.
• Discussion of meiotic aberrations leading to failed homolog recognition.
• Exploration of known processes in natural and non-model eukaryotic taxa.

Main Results:

• Identified breakdown of homologous chromosome pairing in model eukaryotes.
• Focused on lineages with histories of hybridization and polyploidization.
• Exposed significant disparities in understanding this trait among non-model groups.

Conclusions:

• Homologous chromosome pairing regulation is a key evolutionary trait with gaps in understanding.
• Non-model eukaryotes, especially those with complex reproductive histories, require further investigation.
• Future research should address these disparities to build a comprehensive eukaryotic evolutionary picture.