Improved reference genome of Aedes aegypti informs arbovirus vector control

Area of Science:

• Genomics
• Vector Biology
• Medical Entomology

Background:

• Aedes aegypti mosquitoes transmit numerous viral diseases, including dengue, yellow fever, Zika, and chikungunya, affecting over 400 million people annually.
• A high-quality genome assembly is crucial for advancing research into mosquito biology and control strategies, but previous assemblies have been limited.

Purpose of the Study:

• To produce a significantly improved and fully re-annotated genome assembly for Aedes aegypti (AaegL5).
• To demonstrate how the AaegL5 assembly accelerates scientific understanding and the development of intervention strategies against this disease vector.

Main Methods:

• Integration of diverse genomic technologies to create the AaegL5 assembly.
• Anchoring of physical and cytogenetic maps to the new assembly.
• Utilizing high-resolution quantitative trait locus and population genomic analyses.

Main Results:

• The AaegL5 assembly provides a markedly improved, fully re-annotated genome.
• Doubled the number of known chemosensory ionotropic receptors and provided insights into the sex-determining M locus.
• Revealed copy-number variation in glutathione S-transferase genes linked to insecticide resistance and mapped new candidates for vector competence.

Conclusions:

• The AaegL5 genome assembly is a powerful tool that will accelerate biological insights into Aedes aegypti.
• This resource will facilitate the development of novel intervention strategies to combat the spread of mosquito-borne viral diseases.