Hormonal pleiotropy and the evolution of allocation trade-offs.

Area of Science:

• Evolutionary biology
• Endocrinology
• Ecological modeling

Background:

• Classical view posits entrenched trade-offs, but recent evidence suggests they can evolve.
• Energy-reliant traits are regulated by the endocrine system, impacting resource allocation.
• Understanding trade-off evolution is key to evolutionary endocrinology and ecology.

Purpose of the Study:

• To model how endocrine system changes affect the evolution of trade-off shapes.
• To investigate the influence of genetic drift and selection on trade-off evolution.
• To explore the role of resource storage costs and ecological context in shaping trade-offs.

Main Methods:

• Simulated mutations in hormone expression and receptor conformation within an endocrine system model.
• Applied genetic drift and selection to observe evolutionary changes in trade-off shapes.
• Analyzed how resource storage costs and ecological context influence trade-off geometry.

Main Results:

• Trade-off shapes demonstrably evolve under simulated genetic drift and selection.
• The curvature and length of trade-offs are context-dependent, influenced by storage costs and environment.
• Phenotypic convergence in trade-off shape occurred alongside genetic-level redundancy.

Conclusions:

• The endocrine system's plasticity allows for the evolution of trade-off shapes.
• Trade-off evolution is contingent on resource storage costs and ecological factors.
• The model provides a framework for unifying complex observations in evolutionary endocrinology and ecology.