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The inheritance of process: a dynamical systems approach.

Johannes Jaeger¹, David Irons, Nick Monk

¹EMBL/CRG Research Unit in Systems Biology, Centre de Regulació Genòmica, Universtitat Pompeu Fabra, Barcelona, Spain. yogi.jaeger@crg.eu

Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution

|October 13, 2012

Summary

Understanding the genotype-phenotype map is key to evolutionary biology. This study uses dynamical systems theory to link genetic changes to organism traits, explaining evolution and development.

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Area of Science:

Evolutionary Biology
Developmental Biology
Systems Biology

Background:

The relationship between genotype and phenotype is a central, unresolved problem in evolutionary biology.
Developmental and physiological processes mediate this genotype-phenotype map but are complex and poorly understood.
These processes influence the rate and direction of adaptive evolution by shaping phenotypic variation.

Purpose of the Study:

To propose an integrated understanding of evolution and development using dynamical systems theory to model the genotype-phenotype map.
To demonstrate how development influences phenotypic transitions and biological system evolvability.
To present a conceptual framework for understanding heredity as a dynamic process.

Main Methods:

Utilizing dynamical systems theory to explicitly treat the genotype-phenotype map.
Developing a conceptual framework based on earlier ideas by Goodwin, Oster, and Alberch.
Employing a simple conceptual model to illustrate regulatory dynamics and generational inheritance.

Main Results:

The model explains punctuated evolutionary dynamics and the distinction between microevolution and macroevolution.
It sheds light on the role of the environment in major phenotypic transitions.
The framework suggests heredity can be viewed as a dynamic process.

Conclusions:

An explicit dynamical systems treatment of the genotype-phenotype map offers an integrated view of evolution and development.
A quantitative research program in evolutionary developmental systems biology is proposed, combining experimental and mathematical approaches.
This research aims to extend evolutionary theory by integrating dynamic molecular genetic data with development and evolution.