Understanding Gene Networks in Arthropod Development
Author Information
Author(s): Fujimoto Koichi, Ishihara Shuji, Kaneko Kunihiko
Primary Institution: ERATO Complex Systems Biology Project, Japan Science and Technology Agency
Hypothesis
Are the diversities in body plans solely triggered by random events, or are they inevitable outcomes of an interplay between evolving gene networks and natural selection?
Conclusion
The emergence of the three modes of body segmentation in arthropods is an inherent property of the evolving networks.
Supporting Evidence
- Regulatory genes relevant for stripe formation are evolutionarily conserved among arthropods.
- Network architectures, gene expression patterns, and knockout responses agree with those reported in Drosophila melanogaster and Tribolium castaneum.
- Multiple FFLs are always included in the core networks in the long germ modes.
- At least one negative FBL is always included in the short germ mode.
Takeaway
Scientists studied how genes work together to create different body shapes in insects, finding that certain patterns are built into their genetic code.
Methodology
Numerical evolution of gene regulatory networks to analyze their structure and function in producing striped patterns of gene expression.
Limitations
The study does not account for embryo growth at the posterior end, which may affect segmentation.
Digital Object Identifier (DOI)
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