Pavle Erić, M. Stamenković-Radak, Milan B Dragićević, M. Kankare, M. Wallace, Marija Savić Veselinović, Mihailo Jelić
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引用次数: 1
Abstract
Drosophila obscura is a common fruit fl y that inhabits the temperate forests of Europe. While it is abundant in the north compared to other Drosophila, its density decreases southwards, where it is gradually replaced by other Drosophila species. This study describes variation in the mitochondrial Cyt b gene of D. obscura from several European populations. We observed a large number of haplotypes, together with the structuring of genetic variation. Genetic variation is higher in the west where O1 and related divergent haplotypes dominate. In the east, the O2 haplotype is most frequent, together with haplotypes that recently arose from it. In the central part of the species range, both O1 and O2 are equally present, along with many others. These data reveal signs of population expansions that probably happened earlier in the west, and more recently in the east. Though our conclusions are based on only one genetic marker, limiting the power of the analysis, the results imply either postglacial expansion from two unique sources or, more likely, eastwards stepping-stone expansion. This study adds important information on genetic variation and phylogeography to the obscure biology of D. obscura, a species that has the potential to become an interesting model in evolutionary biology and conservation genetics. * Current address: College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Cornwall TR10 9FE, UK; email: M.A.Wallace@exeter.ac.uk INTRODUCTION Drosophila obscura, the nominate species of the obscura group, is a Palearctic fruit fl y whose distribution extends from Southern Europe to the central Fennoscandia, and from Western Europe to central Asia (Lakovaara & Saura, 1971; Brehm & Krimbas, 1991). In Europe, its relative abundance decreases from north to south (Brehm & Krimbas, 1991). In southern Finland, it is the most abundant Drosophila species (Lakovaara & Saura, 1971). Along with D. subobscura, D. obscura is the one of the two most common Drosophila species in Great Britain, although D. subobscura outnumbers it during most months (Shorrocks, 1975; Begon, 1978). In the Central Balkans, among obscura group species, it is much less abundant than D. subobscura (Stanić et al., 2002; Pavković-Lučić et al., 2012), but is readily collected at higher altitudes (long-term observaEur. J. Entomol. 119: 99–110, 2022 doi: 10.14411/eje.2022.011
期刊介绍:
EJE publishes original articles, reviews and points of view on all aspects of entomology. There are no restrictions on geographic region or taxon (Myriapoda, Chelicerata and terrestrial Crustacea included). Comprehensive studies and comparative/experimental approaches are preferred and the following types of manuscripts will usually be declined:
- Descriptive alpha-taxonomic studies unless the paper is markedly comprehensive/revisional taxonomically or regionally, and/or significantly improves our knowledge of comparative morphology, relationships or biogeography of the higher taxon concerned;
- Other purely or predominantly descriptive or enumerative papers [such as (ultra)structural and functional details, life tables, host records, distributional records and faunistic surveys, compiled checklists, etc.] unless they are exceptionally comprehensive or concern data or taxa of particular entomological (e.g., phylogenetic) interest;
- Papers evaluating the effect of chemicals (including pesticides, plant extracts, attractants or repellents, etc.), irradiation, pathogens, or dealing with other data of predominantly agro-economic impact without general entomological relevance.