Genetic evidence for a worldwide chaotic dispersion pattern of the arbovirus vector, Aedes albopictus.

Résumé : Invasive species represent a global concern for their rapid spread and the possibility of infectious disease transmission. This is the case of the global invader Aedes albopictus, the Asian tiger mosquito. This species is a vector of medically important arboviruses, notably chikungunya (CHIKV), dengue (DENV) and Zika (ZIKV). The reconstruction of the complex colonization pattern of this mosquito has great potential for mitigating its spread and, consequently, disease risks. Classical population genetics analyses and Approximate Bayesian Computation (ABC) approaches were combined to disentangle the demographic history of Aedes albopictus populations from representative countries in the Southeast Asian native range and in the recent and more recently colonized areas. In Southeast Asia, the low differentiation and the high co-ancestry values identified among China, Thailand and Japan indicate that, in the native range, these populations maintain high genetic connectivity, revealing their ancestral common origin. China appears to be the oldest population. Outside Southeast Asia, the invasion process in La Réunion, America and the Mediterranean Basin is primarily supported by a chaotic propagule distribution, which cooperates in maintaining a relatively high genetic diversity within the adventive populations. Classical population genetics analyses and Approximate Bayesian Computation (ABC) approaches were combined to disentangle the demographic history of Aedes albopictus populations from representative countries in the Southeast Asian native range and in the recent and more recently colonized areas. In Southeast Asia, the low differentiation and the high co-ancestry values identified among China, Thailand and Japan indicate that, in the native range, these populations maintain high genetic connectivity, revealing their ancestral common origin. China appears to be the oldest population. Outside Southeast Asia, the invasion process in La Réunion, America and the Mediterranean Basin is primarily supported by a chaotic propagule distribution, which cooperates in maintaining a relatively high genetic diversity within the adventive populations.
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PLoS Neglected Tropical Diseases, Public Library of Science, 2017, 11 (1), pp.e0005332. 〈10.1371/journal.pntd.0005332〉
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Mosè Manni, Carmela R Guglielmino, Francesca Scolari, Anubis Vega-Rúa, Anna-Bella Failloux, et al.. Genetic evidence for a worldwide chaotic dispersion pattern of the arbovirus vector, Aedes albopictus.. PLoS Neglected Tropical Diseases, Public Library of Science, 2017, 11 (1), pp.e0005332. 〈10.1371/journal.pntd.0005332〉. 〈pasteur-01468191〉

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