Interaction-based evolution: how natural selection and nonrandom mutation work together.

Area of Science:

• Evolutionary Biology
• Genetics
• Molecular Biology

Background:

• The modern evolutionary synthesis leaves fundamental questions about the role of sex, complex adaptation, and selection on genetic interactions unresolved.
• Recent molecular and genomic findings, such as de novo genes and transposable elements, challenge traditional evolutionary explanations.

Purpose of the Study:

• To propose a unified mechanistic view of evolution connecting phenotype selection with genetic evolutionary change.
• To hypothesize that relevant mutation for complex adaptation is an evolving, non-random process combining information from multiple genetic loci.

Main Methods:

• Introduced a novel mechanism where selection on interacting alleles at different loci can have a hereditary effect based on combined fitness.
• Discussed empirical evidence from molecular and organismal evolution supporting the proposed mechanism.
• Offered testable predictions for future research.

Main Results:

• The proposed mechanism explains how beneficial genetic interactions evolve under selection.
• It provides an intuitive explanation for the role of sexual reproduction in generating genetic combinations.
• Suggests that seemingly neutral genetic variation possesses greater adaptive potential through selection on interactions.

Conclusions:

• This new mechanistic view offers a more comprehensive understanding of evolutionary processes.
• It highlights the adaptive significance of genetic interactions and the role of evolving mutation processes.
• The framework provides a basis for resolving long-standing questions in evolutionary biology.