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Mytilus galloprovincialis-type foot-protein-1 alleles occur at low frequency among mussels in the Dutch Wadden Sea
Luttikhuizen, P.C.; Koolhaas, A.; Bol, A.; Piersma, T. (2002). Mytilus galloprovincialis-type foot-protein-1 alleles occur at low frequency among mussels in the Dutch Wadden Sea. J. Sea Res. 48(3): 241-245. http://dx.doi.org/10.1016/s1385-1101(02)00168-5
In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414, more
Peer reviewed article  

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Keywords
    Biology > Genetics
    Biology > Genetics > Population genetics
    Disciplines > Biology > Genetics > Population genetics > Genetic equilibrium > Introgression
    Hybridization
    Population characteristics > Population number
    Mytilus edulis Linnaeus, 1758 [WoRMS]; Mytilus edulis Linnaeus, 1758 [WoRMS]; Mytilus galloprovincialis Lamarck, 1819 [WoRMS]
    ANE, Wadden Sea [Marine Regions]
    Marine/Coastal
Author keywords
    Mytilus edulis; hybridisation; introgression; population genetics;geographic structure

Authors  Top 
  • Luttikhuizen, P.C., correspondent
  • Koolhaas, A.
  • Bol, A.
  • Piersma, T.

Abstract
    The presence of M. galloprovincialis-type genes among the population of mussels in the Dutch Wadden Sea, historically described as M. edulis, was assessed. We applied the molecular technique in which a fragment of the gene coding for an adhesive protein of the byssus of mussels is amplified by PCR and assayed for length using electrophoresis. Among 321 individual mussels collected in August-October 2001 at 14 sites (5 intertidal, 9 subtidal) widely dispersed over the Dutch Wadden Sea, 6 specimens (collected at 5 sites) were found that showed a heterozygote genotype with both the M. edulis- and the M. galloprovincialis-type alleles being amplified; all others were identified as homozygotes for the M. edulis-type allele. Differentiation in frequencies of heterozygotes among sites was not detected. The fact that the M. galloprovincialis-type allele was present at low frequency (0.0093) may be attributed to one of three possible, and not mutually exclusive, causes: incomplete diagnosticity of this marker, an historically stable introgression zone in the Wadden Sea, or a recent invasion.

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