Abstract
The genetic structure of populations of the Mytilus edulis (L.)-M. galloprovincialis (Lmk.) complex has been characterized by studying polymorphism by means of isoenzyme electrophoresis. Three known loci (MPI, EST-D, GPI) have been used to characterize samples taken from two hybridization sites on the French Atlantic coast. The purpose of this study was to investigate the genotypical composition of a mussel brood during two consecutive years (1990 and 1991) in relation to the genetic structure of parental populations analyzed in 1989. The 1989 parental samples showed a strong hybridization at the two sites, and there was a correspondingly high degree of evolution in the 1990 and 1991 broods towards M. edulis. This indicates that genetic structure is not stable in the syntopic zones over time, and that there can be a marked evolution of genetic components, as demonstrated by the results from Groix Island between 1990 and 1991, where brood structure did not conform to that of the parental population. Our study takes into account environmental characteristics, gene flow, and the selection of dependent genotypes responsible for the evolution of the observed biodiversity at hybridization sites where bivalve culture is a contributory factor.
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References
Ahmad M, Skibinski DOF, Beardmore JA (1977) An estimate of the amount of genetic variation in the common mussel Mytilus edulis. Biochem Genetic 15:833–846
Bayne BL (1976) Marine mussels, their ecology and physiology. Cambridge University Press, Cambridge, England
Beaumont AR, Seed R, Garcia-Martinez P (1989) Electrophoretic and morphometric criteria for the identification of the mussels Mytilus edulis and M. galloprovincialis. In: Ryland JS, Tyler PA (eds) Reproduction, genetics, and distribution of marine organisms. Olsen & Olsen, Fredensborg, Denmark, p 251–258
Benzecri JP (1982) L'analyse des données. II. L'analyse des correspondances. Durod, Paris
Coustau C, Renaud F, Delay B (1991a) Genetic characterization of the hybridation between Mytilus edulis and M. galloprovincialis on the Atlantic coast of France. Mar Biol 111:87–93
Coustau C, Renaud F, Maillard C, Pasteur N, Delay B (1991b) Differential susceptibility to a trematode parasite among genotypes of the Mytilus edulislgalloprovincialis complex. Genet Res 57: 207–212
Gardner JPA, Skibinski DOF (1988) Historical and size-dependent genetic variation in hybrid mussel population. Heredity, Lond 61: 93–105
Gartner-Kepkay KF, Zouros E, Dickie LM, Freeman KR (1983) Genetic differentiation in face of gene flow: a study of mussel populations from a single Nova Scotian embayment. Can J Fish aquat Sciences 40:443–451
Johannesson K, Kaustky N, Tedengreen M (1990) Genotypic and phenotypic differences between Baltic and North Sea populations of Mytilus edulis evaluated through reciprocal transplantation. II. Genetic variation. Mar Ecol Prog Ser 59:211–219
Lewis JR, Seed R (1969) Morphological variation in Mytilus from south-west England in relation to the occurrence of M. galloprovincialis (Lmk). Cah Biol mar 10:231–253
Seed R (1971) A physiological and biochemical approach to the taxonomy of Mytilus edulis (L) and Mytilus galloprovincialis (Lmk) from S. W. England. Cah Biol mar 12:291–322
Selander RK (1970) Behavior and genetic variation in natural populations. Am Zool 10:53–66
She JX, Autem M, Kotulas G, Pasteur N, Bonhomme F (1987) Multivariate analysis of genetic exchanges between Solea aegyptiaca and Solea senegalensis (Teleostis, Soleidae). Biol J Linn Soc 32:357–371
Skibinski DOF (1983) Natural selection in hybrid mussel populations. In: Oxford GS, Rollinson D (eds) Protein polymorphism: adaptative and taxonomic significance. Academic Press, London, pp 283–298
Skibinski DOF, Ahmad M, Beardmore JA (1978) Genetic evidence for naturally occurring hybrids between Mytilus edulis and Mytilus galloprovincialis. Evolution 32:354–364
Skibinski DOF, Cross TF, Ahmad M (1980) Electrophoretic investigation of systematic relationships in the marine mussels Modiolus modiolus L., Mytilus edulis L. and Mytilus galloprovincialis Lmk (Mytilidae, Mollusca). Biol J Linn Soc 13:65–73
Sokal RR, Rohlf FJ (1981) Biometry. The principles and practice of statistics in biological research. W. H. Freeman & Co, San Francisco
Sokal RR, Rohlf FJ (1981) Biometry. The principles and practice of statistics in biological research. 2nd edn. W. H. Freeman & Co, New York
Soot-Ryen T (1955) A report on the family Mytilidae (Pelecypoda). Allan Hancock Pacif Exped 20:1–74
Zouros E, Foltz DW (1984) Possible explanation of heterozygote deficiency in bivalves molluscs. Malacologia 25:583–591
Zouros E, Foltz DW (1987) The use of allelic isozyme variation for the study of heterosis. Curr Topics biol med Res 13:1–59
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Communicated by J. M. Pérès, Marseille
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Viard, F., Delay, B., Coustau, C. et al. Evolution of the genetic structure of bivalve cohorts at hybridization sites of the Mytilus edulis-M. galloprovincialis complex. Marine Biology 119, 535–539 (1994). https://doi.org/10.1007/BF00354315
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DOI: https://doi.org/10.1007/BF00354315