genetic diversity, population structure and wolbachia infection status in a worldwide sample of drosophila melanogaster and d. simulans populations遗传多样性、人口结构和沃尔巴克氏体属感染在全球地位的黑腹果蝇和d . simulans人口样本.pdfVIP
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genetic diversity, population structure and wolbachia infection status in a worldwide sample of drosophila melanogaster and d. simulans populations遗传多样性、人口结构和沃尔巴克氏体属感染在全球地位的黑腹果蝇和d . simulans人口样本
Genetic Diversity, Population Structure and Wolbachia
Infection Status in a Worldwide Sample of Drosophila
melanogaster and D. simulans Populations
Rudi L. Verspoor, Penelope R. Haddrill*
Institute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, Edinburgh, United Kingdom
Abstract
Drosophila melanogaster and its close relatives have been extremely important model species in the development of
population genetic models that serve to explain patterns of diversity in natural populations, a major goal of evolutionary
biology. A detailed picture of the evolutionary history of these species is beginning to emerge, as the relative importance of
forces including demographic changes and natural selection is established. A continuing aim is to characterise levels of genetic
diversity in a large number of populations of these species, covering a wide geographic area. We have used collections from
five previously un-sampled wild populations of D. melanogaster and two of D. simulans, across three continents. We estimated
levels of genetic diversity within, and divergence between, these populations, and looked for evidence of genetic structure
both between ancestral and derived populations, and amongst derived populations. We also investigated the prevalence of
infection with the bacterial endosymbiont Wolbachia. We found that D. melanogaster populations from Sub-Saharan Africa are
the most diverse, and that divergence is highest between these and non-Sub-Saharan populations. There is strong evidence
for structuring of populations between Sub-Saharan Africa and the rest of the world, and some evidence for weak structure
amongst derived populations. Populations from Sub-Saharan Africa also differ in the prevalence of Wolbachia infection, with
very low levels of infection compared to populations from the rest of the world.
Citation: Ve
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