RT Journal Article
SR Electronic
T1 Genomic evidence for adaptive evolution of the invasive Asian tiger mosquito towards temperate environment
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 049197
DO 10.1101/049197
A1 Clément Goubert
A1 Hélène Henri
A1 Guillaume Minard
A1 Claire Valiente Moro
A1 Patrick Mavingui
A1 Cristina Vieira
A1 Matthieu Boulesteix
YR 2016
UL http://biorxiv.org/content/early/2016/04/18/049197.abstract
AB Invasive species represent unique opportunities to evaluate the role of local adaptation during colonization of new environments. Among these, the Asian tiger mosquito, Aedes albopictus, is a threatening vector of several human viral diseases, including dengue, chikungunya and the emerging Zika fevers. Its broad presence in both temperate and tropical environments has sometimes been considered as the reflect of a great “ecological plasticity”. However, no study has been conducted to assess the role of adaptive evolution in the ecological success of Ae. albopictus at the molecular level. In the present study we performed a genomic scan to search for potential signatures of selection leading to local adaptation in a hundred of field collected mosquitoes from native populations of Vietnam and temperate invasive populations of Europe. High throughput genotyping of transposable element insertions generated more than 120 000 polymorphic loci, which in their great majority revealed a virtual absence of structure between bio-geographic areas. Nevertheless, 92 outlier loci show a high level of differentiation between temperate and tropical populations. The majority of these loci segregates at high insertion frequencies among European populations, indicating that this pattern could have been caused by recent events of adaptive evolution in temperate areas. Six outliers were located near putative diapause effector genes, suggesting fine tunning of this critical pathway during local adaptation.