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Organogenesis in deep time: A problem in genomics, development, and paleontology
Joyce Pieretti1, Andrew R Gehrke1, Igor Schneider2
1Department of Organismal Biology and Anatomy, The University of Chicago, Chicago, IL 60637; and.
Summary
Investigating vertebrate appendages reveals how fossils and modern genomics illuminate evolutionary changes. This research integrates paleontology and developmental biology to understand morphological evolution and the genetic basis of phenotypic shifts.
Area of Science:
- Evolutionary biology
- Developmental biology
- Paleontology
Background:
- The fossil record provides crucial insights into major morphological transitions.
- Developmental, embryological, and functional genomics reveal evolutionary trajectories of phenotypic shifts.
- Vertebrate appendages offer a model system to study morphological evolution.
Purpose of the Study:
- To demonstrate how integrating diverse scientific disciplines can enhance the study of morphological evolution.
- To explore the evolutionary origins and modifications of vertebrate appendages.
- To investigate the relationship between genes, development, and evolving phenotypes.
Main Methods:
- Analysis of the fossil record for transitional forms.
- Review of developmental and genomic data on fish fins and tetrapod limbs.
- Case studies on mechanisms of digit loss in tetrapods.
Main Results:
- Classical theories on paired fin origins are discussed.
- Recent data on regulatory gene modulations in fins and limbs are presented.
- Mechanisms of digit loss in tetrapods are explored through case studies.
Conclusions:
- Integrating fossil evidence with laboratory experiments, including genome manipulation, can reveal the deep history of morphological evolution.
- This interdisciplinary approach sheds light on the intricate relationship between genes, developmental processes, and the evolving phenotype.
- Future research can leverage this integration to test hypotheses about morphological evolution.
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