Microsatellite Analysis of Olive Fly Populations in the Mediterranean Indicates a Westward Expansion of the Species |
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| Authors: | AA Augustinos Z Mamuris EE Stratikopoulos S D’Amelio A Zacharopoulou KD Mathiopoulos |
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| Institution: | (1) Department of Biology, University of Patras, Rion 26504, Greece;(2) Department of Biochemistry and Biotechnology, University of Thessaly, Ploutonos 26, Larissa 41221, Greece;(3) Department of Public Health Sciences, University of Rome “La Sapienza”, P.le Aldo Moro 5, Box 6 Roma 62, 00185 Roma, Italy |
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| Abstract: | Bactrocera oleae is the major insect pest of the olive fruit. Twelve microsatellite loci isolated from the genome of this insect were used
in a Mediterranean-wide population analysis. These loci were highly polymorphic with a mean number of alleles per locus of
10.42 and a mean effective number of alleles of 2.76. The analysis was performed on a sample of 671 flies collected from nineteen
locations around the European part of the Mediterranean basin. Despite the high level of gene flow across the Mediterranean,
results support the notion of a differentiation of three subpopulations: one of the Iberian Peninsula, one of Greece and Italy
and one of Cyprus. In addition, the gradual decrease of heterozygosity from the Eastern to the Western part of the Mediterranean
indicates a westward expansion of the species. |
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| Keywords: | Bactrocera (Dacus) oleae olive fly Tephritidae microsatellite polymorphism population structure colonization |
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