Evolution of hydra, a recently evolved testis-expressed gene with nine alternative first exons in Drosophila melanogaster
2007
Evolution of the hydra Gene in Drosophila
publication
Evidence: high
Author Information
Author(s): Chen Shou-Tao, Cheng Hsin-Chien, Barbash Daniel A, Yang Hsiao-Pei
Primary Institution: National Yang-Ming University, Taipei, Taiwan; Cornell University, Ithaca, New York, USA
Hypothesis
How has the hydra gene evolved in Drosophila melanogaster and its sibling species?
Conclusion
The hydra gene has undergone significant structural and expression level evolution, particularly in the testes of Drosophila species.
Supporting Evidence
- The hydra gene is found only in the melanogaster subgroup of Drosophila, indicating its recent origin.
- Hydra is predominantly expressed in the testes, suggesting a role in male fertility.
- Hydra has undergone recurrent duplications, leading to nine alternative first exons in Drosophila melanogaster.
- Expression levels of hydra differ significantly between D. melanogaster and D. simulans, with D. simulans showing much higher expression.
Takeaway
Scientists studied a gene called hydra in fruit flies that has changed a lot over time, especially in how it's built and how much it's used in male flies.
Methodology
The study involved genomic analysis, RT-PCR, and Southern hybridization to investigate the structure and expression of the hydra gene.
Digital Object Identifier (DOI)
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