The zebra mussel Dreissena polymorpha is widely present in Italy, but Italian populations of this bivalve have never been genetically characterized. The mitochondrial Cytochrome Oxidase subunit I gene fragments have been used to determine the genetic structures of 3 populations from Lake Garda (n = 30), the first Italian basin colonized by this species, as well as 2 populations from Lake Constance, Germany (n = 14). A Neighbor-Joining tree and a Maximum Likelihood analysis were performed with 4 new Italian (LG1-LG4) and 3 German (LC1-LC3) haplotypes, also considering all the available Dreissena sequences from GenBank in order to estimate phylogeographic relationships. Almost all Italian haplotypes clustered with German and mid-European samples providing evidences of a mixed origin for Italian mussels. We speculate about Lake Garda colonization, for which the hypothesized "German origin" has been partially confirmed as well as the necessity of more efficient control strategies at least to minimize new colonizations.

Zebra mussels in Italy : where do they come from? / F. Quaglia, L. Lattuada, P. Mantecca, R. Bacchetta. - In: BIOLOGICAL INVASIONS. - ISSN 1387-3547. - 10:4(2008 Apr), pp. 555-560.

Zebra mussels in Italy : where do they come from?

F. Quaglia
Primo
;
L. Lattuada
Secondo
;
P. Mantecca
Penultimo
;
R. Bacchetta
Ultimo
2008-04

Abstract

The zebra mussel Dreissena polymorpha is widely present in Italy, but Italian populations of this bivalve have never been genetically characterized. The mitochondrial Cytochrome Oxidase subunit I gene fragments have been used to determine the genetic structures of 3 populations from Lake Garda (n = 30), the first Italian basin colonized by this species, as well as 2 populations from Lake Constance, Germany (n = 14). A Neighbor-Joining tree and a Maximum Likelihood analysis were performed with 4 new Italian (LG1-LG4) and 3 German (LC1-LC3) haplotypes, also considering all the available Dreissena sequences from GenBank in order to estimate phylogeographic relationships. Almost all Italian haplotypes clustered with German and mid-European samples providing evidences of a mixed origin for Italian mussels. We speculate about Lake Garda colonization, for which the hypothesized "German origin" has been partially confirmed as well as the necessity of more efficient control strategies at least to minimize new colonizations.
Dreissena ; genetic diversity ; invasive species ; Italy ; Lake Garda ; Lake Constance ; mtDNA ; phylogeography ; Range expansion ; Zebra mussel
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/69130
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