Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Patterns of genetic variation of a Lessepsian parasite |
| Abstract | Genetic studies of Lessepsian species often demonstrate the absence of a genetic bottleneck in a wide plethora of taxa, from plants to fish, but information regarding the genetic responses of their parasites in the newly colonized ecosystems is still lacking. This study compared genetic diversity of Red Sea (Eilat, Nabq), Suez canal (Ismailia) and Mediterranean (Rhodes, Tel Aviv) populations of the Monogenoidea Glyphidohaptor plectocirra by sequencing a portion of the mitochondrial CoxI gene. Despite evidence of a slight decrease in the genetic diversity of Mediterranean populations, a simulation analysis based on coalescent theory demonstrated the absence of significant bottlenecks, but there was directional selection along a cline moving further from the Suez canal. The absence of bottlenecks was congruent with that described for G. plectocirra hosts Siganus rivulatus and Siganus luridus, and reflected a common history of high propagule pressure during initial colonization, and constant or repeated gene flow from the Red Sea to the Mediterranean area. However, directional selection was peculiar to the parasites and likely originated from parasite genotype x environment interactions. Finally, an anisotropic contribution of Red Sea populations to the Lessepsian invasion was demonstrated. |
| Source | Biological invasions 14 (8), pp. 1725–1736 |
| Keywords | LessepsianSiganidaeMonogenoideaGlyphidohaptorDirectional selectionBottleneck |
| Journal | Biological invasions |
| Editor | Kluwer Academic Publishers, London ;, Paesi Bassi |
| Year | 2012 |
| Type | Articolo in rivista |
| DOI | 10.1007/s10530-012-0183-3 |
| Authors | Stefani, Fabrizio; Aquaro, Giovanni; Azzurro, Ernesto; Colorni, Angelo; Galli, Paolo |
| Text | 307912 2012 10.1007/s10530 012 0183 3 ISI Web of Science WOS 000306334500018 Lessepsian Siganidae Monogenoidea Glyphidohaptor Directional selection Bottleneck Patterns of genetic variation of a Lessepsian parasite Stefani, Fabrizio; Aquaro, Giovanni; Azzurro, Ernesto; Colorni, Angelo; Galli, Paolo Consiglio Nazionale delle Ricerche CNR ; University of Milano Bicocca; STS Livorno; Natl Ctr Mariculture Genetic studies of Lessepsian species often demonstrate the absence of a genetic bottleneck in a wide plethora of taxa, from plants to fish, but information regarding the genetic responses of their parasites in the newly colonized ecosystems is still lacking. This study compared genetic diversity of Red Sea Eilat, Nabq , Suez canal Ismailia and Mediterranean Rhodes, Tel Aviv populations of the Monogenoidea Glyphidohaptor plectocirra by sequencing a portion of the mitochondrial CoxI gene. Despite evidence of a slight decrease in the genetic diversity of Mediterranean populations, a simulation analysis based on coalescent theory demonstrated the absence of significant bottlenecks, but there was directional selection along a cline moving further from the Suez canal. The absence of bottlenecks was congruent with that described for G. plectocirra hosts Siganus rivulatus and Siganus luridus, and reflected a common history of high propagule pressure during initial colonization, and constant or repeated gene flow from the Red Sea to the Mediterranean area. However, directional selection was peculiar to the parasites and likely originated from parasite genotype x environment interactions. Finally, an anisotropic contribution of Red Sea populations to the Lessepsian invasion was demonstrated. 14 Articolo in rivista Kluwer Academic Publishers 1387 3547 Biological invasions Biological invasions fabrizio.stefani STEFANI FABRIZIO |