An intricate evolutionary connection between meiotic drive and sex

Area of Science:

• Evolutionary Biology
• Genetics
• Molecular Biology

Background:

• Meiotic drive systems are genetic elements that bias their own inheritance, overriding normal Mendelian rules.
• These systems frequently reside on sex chromosomes and can cause genetic conflicts, affecting host fitness and evolution.
• Meiotic drive can distort sex ratios, impact fertility, and trigger coevolutionary arms races with suppressor elements.

Purpose of the Study:

• To review the dynamic interplay between meiotic drive and sex chromosome evolution.
• To highlight how meiotic drive influences speciation, reproductive traits, and sexual selection.
• To underscore the broad evolutionary impact of meiotic drive systems.

Main Methods:

• This is a review article, synthesizing existing research.
• It analyzes the literature on meiotic drive systems and their effects on genetic elements and host organisms.
• The review integrates molecular, ecological, and evolutionary perspectives.

Main Results:

• Meiotic drivers are often found in recombination-suppressed regions and can drive chromosomal divergence and speciation.
• These systems can reduce male fertility, leading to compensatory adaptations and influencing sexual selection.
• Meiotic drive can either promote speciation by fixing incompatibilities or stabilize karyotypes, delaying reproductive isolation.

Conclusions:

• Meiotic drive is a significant evolutionary force shaping genome structure, reproduction, and diversification.
• Understanding meiotic drive requires integrating molecular, ecological, and evolutionary frameworks.
• Further research is needed to fully elucidate the multifaceted roles of meiotic drive across diverse taxa.