Genetic variability and phylogeography of the invasive zebra mussel, Dreissena polymorpha (Pallas)

被引:98
作者
Astanei, I
Gosling, E
Wilson, J
Powell, E
机构
[1] Galway Mayo Inst Technol, Mol Ecol Res Grp, Dept Life Sci, Galway, Ireland
[2] Trinity Coll Dublin, Dept Zool, Dublin, Ireland
[3] Natl Univ Ireland Galway, Dept Microbiol, Galway, Ireland
关键词
Dreissena polymorpha; heterozygote deficits; invasive species; microsatellites; null alleles; phylogeography;
D O I
10.1111/j.1365-294X.2005.02530.x
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The zebra mussel, Dreissena polymorpha (Pallas), a bivalve species originally native to the Black and Caspian seas, has invaded Ireland in the last decade. Five microsatellite loci were used to investigate genetic diversity and population structure in 10 populations across Europe (Ireland, UK, the Netherlands and Romania) and the Great Lakes (Lake Ontario and Lake St Clair). Levels of allelic diversity and mean expected heterozygosity were high for all populations (mean number of alleles/locus and H-E were 10-15.2 and 0.79-0.89, respectively). High levels of polymorphism observed in Irish populations suggest that the Irish founder population(s) were large and/or several introductions took place after foundation. Significant deficits of heterozygotes were recorded for all populations, and null alleles were the most probable factor contributing to these deficits. Pairwise comparisons using Fisher exact tests and F-ST values revealed little genetic differentiation between Irish populations. The UK sample was not significantly differentiated from the Irish samples, most probably reflecting an English origin for Irish zebra mussels. No significant differentiation was detected between the two Great Lakes populations. Our data support a northwest rather than a central or east European source for North American zebra mussels.
引用
收藏
页码:1655 / 1666
页数:12
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