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Updated: Jun 11, 2025
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Shifting Zebrafish Lethal Skeletal Mutant Penetrance by Progeny Testing
Published on: September 1, 2017
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Ancient developmental genes underlie evolutionary novelties in walking fish.
Amy L Herbert1, Corey A H Allard2, Matthew J McCoy3
1Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305, USA.
Current Biology : CB
|September 27, 2024
Summary
Sea robins evolved unique leg-like fins for ocean floor movement. A gene called tbx3a is key to forming these specialized appendages and associated behaviors, offering insights into major evolutionary trait gain.
Area of Science:
- Evolutionary biology
- Developmental genetics
- Comparative genomics
Background:
- Understanding the evolution of novel traits in wild populations is challenging.
- Sea robins possess unique leg-like appendages used for locomotion and digging on the ocean floor.
Purpose of the Study:
- To investigate the genetic and molecular basis of the evolution of specialized leg-like appendages in sea robins.
- To identify key genes involved in the development of these novel structures.
Main Methods:
- Genome sequencing
- Transcriptional profiling
- Interspecific hybrid analysis
- Genome editing
Main Results:
- The transcription factor tbx3a was identified as a major determinant of sensory leg development.
- tbx3a is essential for the formation of sea robin legs, enlarged central nervous system lobes, and sensory papillae.
- tbx3a also plays a role in adult digging behavior.
Conclusions:
- Sea robins serve as a valuable model organism for studying the evolution of major trait gain.
- Ancient, conserved developmental genes like tbx3a can underlie the formation of novel organs and complex traits.
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