期刊
EVOLUTION
卷 68, 期 2, 页码 514-525出版社
OXFORD UNIV PRESS
DOI: 10.1111/evo.12281
关键词
Aedes aegypti; human association; nuclear markers; population genetics; RAD
资金
- National Institutes of Health Pre-doctoral Training in Genetics [T32-GM07499-33]
- Yale Institute for Biospheric Studies (YIBS), Center for Field Ecology pilot grant
- Programa Nacional de Controle da Dengue (PNCD)
- National Institutes of Health [R01 AI046018]
- National Science Foundation [DEB-1011449]
Although anthropogenic impacts are often considered harmful to species, human modifications to the landscape can actually create novel niches to which other species can adapt. These domestication processes are especially important in the context of arthropod disease vectors, where ecological overlap of vector and human populations may lead to epidemics. Here, we present results of a global genetic study of one such species, the dengue and yellow fever mosquito, Aedes aegypti, whose evolutionary history and current distribution have been profoundly shaped by humans. We used DNA sequences of four nuclear genes and 1504 single nucleotide polymorphism (SNP) markers developed with restriction-site associated DNA (RAD) sequencing to test the hypothesis that Ae. aegypti originated in Africa, where a domestic form arose and spread throughout the tropical and subtropical world with human trade and movement. Results confirmed African ancestry of the species, and supported a single subspeciation event leading to the pantropical domestic form. In addition, genetic data strongly supported the hypothesis that human trade routes first moved domestic Ae. aegypti out of Africa into the New World, followed by a later invasion from the New World into Southeast Asia and the Pacific. These patterns of domestication and invasion are relevant to many species worldwide, as anthropogenic forces increasingly impact evolutionary processes.
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