Population genomics of two invasive mosquitoes (Aedes aegypti and Aedes albopictus) from the Indo-Pacific

PLoS Neglected Tropical Diseases
Thomas L SchmidtAry A Hoffmann

Abstract

The arbovirus vectors Aedes aegypti (yellow fever mosquito) and Ae. albopictus (Asian tiger mosquito) are both common throughout the Indo-Pacific region, where 70% of global dengue transmission occurs. For Ae. aegypti all Indo-Pacific populations are invasive, having spread from an initial native range of Africa, while for Ae. albopictus the Indo-Pacific includes invasive populations and those from the native range: putatively, India to Japan to Southeast Asia. This study analyses the population genomics of 480 of these mosquitoes sampled from 27 locations in the Indo-Pacific. We investigated patterns of genome-wide genetic differentiation to compare pathways of invasion and ongoing gene flow in both species, and to compare invasive and native-range populations of Ae. albopictus. We also tested landscape genomic hypotheses that genetic differentiation would increase with geographical distance and be lower between locations with high connectivity to human transportation routes, the primary means of dispersal at these scales. We found that genetic distances were generally higher in Ae. aegypti, with Pacific populations the most highly differentiated. The most differentiated Ae. albopictus populations were in Vanuatu, Indonesia an...Continue Reading

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Citations

Jan 10, 2021·Molecular Ecology·Thomas L SchmidtAry A Hoffmann
May 28, 2021·Molecular Ecology·Henry L NorthChris D Jiggins
Jun 3, 2021·Trends in Parasitology·Thomas L SchmidtAry A Hoffmann
Aug 12, 2021·Applied and Environmental Microbiology·Perran A RossAry A Hoffmann

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Methods Mentioned

BETA
PCA

Software Mentioned

DAPC
R package vegan
PCA
Beagle
arcmap
map
ref
UMAP
Stacks

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