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Evolution: The deep genetic roots of tetrapod-specific traits.
Tetsuya Nakamura1, Igor Schneider2, Neil H Shubin2
1Department of Genetics, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA.
Current Biology : CB
|May 25, 2021
Summary
Genetic pathways for land invasion in tetrapod ancestors are conserved in fish, according to embryology and comparative genomics studies. These findings highlight deep evolutionary links between aquatic and terrestrial life.
Area of Science:
- Evolutionary biology
- Developmental biology
- Genomics
Background:
- The transition of vertebrates from water to land (tetrapod invasion) was a pivotal event in evolutionary history.
- Understanding the genetic underpinnings of this transition is crucial for evolutionary developmental biology.
Purpose of the Study:
- To investigate the conservation of genetic pathways and regulatory elements involved in the tetrapod land invasion in extant fish species.
- To identify conserved genetic mechanisms linking aquatic and terrestrial vertebrate life.
Main Methods:
- Comparative genomics analysis of fish and tetrapod genomes.
- Embryological studies to examine developmental pathways.
- Bioinformatic analysis of gene regulatory elements.
Main Results:
- Key genetic pathways and gene regulatory elements associated with tetrapod land invasion are deeply conserved in fish.
- Evidence suggests that the genetic toolkit for terrestrial adaptation was present in aquatic ancestors.
Conclusions:
- The genetic architecture enabling the transition to land is ancient and conserved across vertebrate evolution.
- Fish possess conserved genetic elements that were co-opted during the evolution of tetrapods for terrestrial life.
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