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Brazilian populationsofDrosophilamaculifrons(Diptera:Drosophilidae): lowdiversity levels andsignals of apopulation expansionafter the LastGlacial… Francine Cenzi De RéEmanuele Gustani‐BussAna Paula Ferreira de Oliveira2014 год

Brazilian populations ofDrosophila maculifrons(Diptera: Drosophilidae): low diversity levels and signals of a population expansion after the Last Glacial Maximum
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Аннотация: The Quaternary period was marked by considerable changes in climate. Such palaeoclimatic changes affected the population dynamics of many species, both in the Northern and in the Southern Hemisphere. However, the extent of these impacts on the demographic patterns of Neotropical species presenting different ecological requirements remains unclear. Drosophila maculifrons DUDA 1947 belongs to the guaramunu group of Drosophila and represents a potential indicator of the genetic consequences caused by the climatic fluctuations of the Quaternary, because it seems to be sensitive to temperature and humidity shifts. The aim of this study was to evaluate the evolutionary processes subjacent to the patterns of intraspecific diversity and structure of different populations of D. maculifrons. In total, 152 individuals were collected in the south and south-east Brazil. Phylogenetic and phylogeographical analyses were performed based on sequences of COI and COII mitochondrial genes. In general, the results pointed to Brazilian populations of D. maculifrons being extremely impoverished in terms of mitochondrial diversity and population structure, which could be explained by a recent population expansion event dated to approximately 12 000 years ago. In fact, with the assistance of species palaeo-distribution modelling strategies, it was possible to infer that most of the sampled region did not present the D. maculifrons environmental suitability requirements at least during the period of the Last Glacial Maximum. © 2014 The Linnean Society of London, Biological Journal of the Linnean Society, 2014, 112, 55–66.
Год издания: 2014
Авторы: Francine Cenzi De Ré, Emanuele Gustani‐Buss, Ana Paula Ferreira de Oliveira, Luciana Paes de Barros Machado, Rogério Pincela Mateus, Élgion L. S. Loreto, Lizandra Jaqueline Robe
Издательство: Oxford University Press
Источник: Biological Journal of the Linnean Society
Ключевые слова: Insect behavior and control techniques, Genetic diversity and population structure, Plant and animal studies