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A Multi-detection Assay for Malaria Transmitting Mosquitoes
Published on: February 28, 2015
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A genotyping array for the globally invasive vector mosquito, Aedes albopictus.
Luciano Veiga Cosme1, Margaret Corley2, Thomas Johnson2
1Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, 06520-8105, USA. luciano.cosme@yale.edu.
Parasites & Vectors
|March 4, 2024
Summary
A new single-nucleotide polymorphism (SNP) chip for the Asian tiger mosquito (Aedes albopictus) offers a cost-effective genotyping solution. This highly accurate Aealbo chip performs comparably to whole-genome sequencing (WGS) and aids in understanding mosquito population dynamics.
Area of Science:
- Genomics and Bioinformatics
- Vector Biology and Disease Control
Background:
- Whole-genome sequencing (WGS) faces limitations with repetitive genomes, such as the Asian tiger mosquito (Aedes albopictus), hindering genomic analysis.
- Aedes albopictus is an invasive mosquito species and a significant vector for human diseases, necessitating efficient population monitoring tools.
- Developing accessible genotyping platforms is crucial for advancing biological control and understanding the population dynamics of this medically important pest.
Purpose of the Study:
- To develop a cost-effective single-nucleotide polymorphism (SNP) chip for Aedes albopictus genotyping.
- To evaluate the accuracy and utility of the developed SNP chip for population genomic analyses and invasion tracing.
Main Methods:
- Designed the Aealbo SNP chip using approximately 2.7 million SNPs identified from WGS data of 819 worldwide Aedes albopictus samples.
- Validated the chip through laboratory crosses, technical replicate comparisons, and direct comparison with WGS genotypes.
- Applied the Aealbo chip to analyze genomic variation and invasion origins in 237 samples from 28 native-range sites.
Main Results:
- The Aealbo chip targets 175,396 SNPs across coding and non-coding regions, with high probe capture (70%) and Mendelian segregation (98%).
- The chip demonstrates high concordance with WGS, particularly at higher read depths, and may be more accurate for heterozygote detection than low-coverage WGS.
- Population genomic analysis revealed four to five distinct genetic clusters within the native range, indicating complex population structure and admixture.
Conclusions:
- The Aealbo SNP chip is a highly accurate genotyping tool for Aedes albopictus.
- The chip shows excellent concordance with WGS, especially high-coverage data, and offers advantages over low-coverage WGS.
- This platform is valuable for studying population genomics, invasion history, and informing public health strategies against this vector species.
