Conserved wing shape variation across biological scales unveils dialectical relationships between micro- and...

Area of Science:

• Evolutionary biology
• Developmental biology
• Genetics

Background:

• The role of variation in microevolution (short-term evolution) is established.
• Its contribution to macroevolution (long-term evolution) remains a subject of debate.
• Understanding this link is crucial for a comprehensive theory of evolution.

Purpose of the Study:

• To investigate the correlation between microevolutionary variation and macroevolutionary divergence.
• To analyze this relationship across multiple levels of biological organization.
• To clarify the influence of developmental noise and standing genetic variation on evolutionary trajectories.

Main Methods:

• Analysis of Drosophila wing variation data across six biological organization levels.
• Statistical correlation assessment between microevolutionary metrics and macroevolutionary divergence.
• Comparison of findings with established theoretical predictions.

Main Results:

• A positive correlation was observed between microevolutionary variation and macroevolutionary divergence at all analyzed levels.
• Developmental noise exhibited the strongest positive correlation with macroevolutionary divergence.
• Standing genetic variation showed a modest correlation with population divergence, contrary to some predictions.

Conclusions:

• Microevolutionary processes and macroevolutionary divergence are interconnected.
• Developmental processes play a significant, perhaps underestimated, role in long-term evolutionary patterns.
• The interplay between developmental systems and environmental fluctuations shapes evolutionary outcomes.