Recombination suppression in plant adaptation and speciation

Area of Science:

• Evolutionary Biology
• Genomics
• Plant Science

Background:

• Recombination suppression is crucial for genomic divergence and speciation, particularly with ongoing gene flow.
• Mechanisms and evolutionary impacts of recombination suppression in plants are not fully understood due to genome complexity.

Purpose of the Study:

• Synthesize current knowledge on recombination suppression's role in plant adaptation and speciation.
• Examine the genomic contexts and mechanisms driving recombination suppression in plants.

Main Methods:

• Leveraging advances in long-read sequencing and haplotype-resolved assemblies.
• Mapping recombination landscapes across diverse plant systems.

Main Results:

• Recombination suppression links adaptive alleles, restricts gene flow, and promotes genomic divergence.
• It facilitates sex chromosome evolution and originates from structural variants, transposable elements, and epigenetic modifications.

Conclusions:

• Recombination suppression plays multifaceted roles in plant adaptation and speciation.
• A conceptual framework integrating genomic, ecological, and evolutionary scales is provided.
• Key open questions for future research are highlighted.