Abstract
Mussels from a natural population of Mytilus edulis, which had settled onto ropes, were collected from Killary Harbour on the west coast of Ireland in November 1986 when they were approximately 5 mo old. Shell lengths in the cohort ranged between 13 and 33 mm and did not differ significantly from a normal distribution. Heterozygosity at five polymorphic loci (Gpi, Pgm, Lap, Odh, and Est-D) was determined for each measured individual. Highly heterozygous individuals did not achieve higher and more uniform growth rates than homozygous individuals of the same cohort. When the results for each locus were considered individually, there was a significant positive correlation between heterozygosity and growth rate for the Odh locus. Significant departures from Hardy-Weinberg expectations were observed at the Pgm, Lap and Odh loci, and the magnititude of the deficiency was marginally larger among smaller, slower growing mussels of the cohort. Overall, these results contrast with those observed by other investigators for a single cohort of M. edulis sampled from Long Island Sound (USA).
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Literature cited
Adamkewicz, L., Taub, S. R., Wall, J. R. (1984). Genetics of the clam Mercenaria mercenaria. II. Size and genotype. Malacologia 25: 525–533
Ahmad, M., Skibinski, D. O. F., Beardmore, J. A. (1977). An estimate of the amount of genetic variation in the common mussel Mytilus edulis. Biochem. Genet. 15: 833–846
Beaumont, A. R., Beveridge, C. M., Budd, M. D. (1983). Selection and heterozygosity within single families of the mussel Mytilus edulis L. Mar. Biol. Lett. 4: 151–161
Beaumont, A. R., Day, T. R., Gade, G (1980). Genetic variation at the octopine dehydrogenase locus in the adductor muscle of Cerastoderma edule (L.) and six other bivalve species. Mar. Biol. Lett. 1: 137–148
Beaumont, A. R., Gosling, E. M., Beveridge, C. M., Budd, M. D., Burnell, G. M. (1985). Studies on heterozygosity and size in the scallop Pecten maximus (L.). Proc. 19th Eur. mar. Biol. Symp. 529–534 [Gibbs, P. E. (ed.) Cambridge University Press, Cambridge]
Diehl, W. J., Koehn, R. K. (1985). Multiple-locus heterozygosity, mortality, and growth in a cohort of Mytilus edulis. Mar. Biol. 88: 265–271
Foltz, D. W., Zouros, E. (1984). Enzyme heterozygosity in the scallop Placopecten magellanicus (Gmelin) in relation to age and size. Mar. Biol. Lett. 5: 255–263
Gaffney, P. M., Scott, T. M. (1984). Genetic heterozygosity and production traits in natural and hatchery populations of bivalves. Aquaculture, Amsterdam 42: 289–302
Garton, D. W., Koehn, R. K., Scott, T. M. (1984). Multiple locus heterozygosity and the physiological energetics of growth in the coot clam, Mulinia lateralis, from a natural population. Genetics, Austin, Tex. 108: 445–455
Gentili, M. R., Beaumont, A. R. (1988). Environmental stress, heterozygosity and growth rate in Mytilus edulis. J. exp. mar. Biol. Ecol. 120: 145–153
Gosling, E. M. (1982). Genetic variability in hatchery-produced Pacific oysters (Crassostrea gigas Thunberg). Aquaculture, Amsterdam 26: 273–287
Gosling, E. M. (1984). The systematic status of Mytilus galloprovicialis in Western Europe: a review. Malacologia 25: 551–568
Gosling, E. M., Wilkins, N. P. (1981). Ecological genetics of the mussels Mytilus edulis and M. galloprovincialis on Irish coasts. Mar. Ecol. Prog. Ser. 4: 221–227
Green, R. H., Singh, S. M., Hicks, B., McCuaig, J. (1983). An Arctic intertidal population of Macoma balthica (Mollusca, Pelecypoda): genotypic and phenotypic components of population structure. Can. J. Fish. aquat. Sciences 40: 1360–1371
Koehn, R. K., Gaffney, P. M. (1984). Genetic heterozygosity and growth rate in Mytilus edulis. Mar. Biol. 82: 1–7
Koehn, R. K., Shumway, S. E. (1982). A genetic/physiological explanation for differential growth rate among individuals of the oyster Crassostrea virginica (Gmelin). Mar. Biol. Lett. 3: 35–42
Leydig, F. T., Guries, R. P., Bonefeld, B. A. (1983). The relation of growth to heterozygosity in pitch pine. Evolution, Lawrence, Kansas 37: 1227–1238
Mitton, J. B., Grant, M. C. (1984). Associations among protein heterozygosity, growth rate and developmental homeostasis. A. Rev. Ecol. Syst. 15: 479–499
Murdock, E. A., Ferguson, A., Seed, R. (1975). Geographical variation in leucine aminopeptidase in Mytilus edulis L. from the Irish coasts. J. exp. mar. Biol. Ecol. 19: 33–41
Rodhouse, P. G., Gaffney, P. M. (1984). Effect of heterozygosity on metabolism during starvation in the American oyster Crassostrea virginica. Mar. Biol. 80: 179–187
Scopes, R. K. (1968). Method for starch gel electrophoresis of sarcoplasmic proteins. An investigation of the relative mobilities of the glycolytic enzymes from the muscles of a variety of species. Biochem. J. 107: 139–150
Singh, S. M. and Zouros, E. (1978). Genetic variation aassociated with growth rate in the American oyster (Crassostrea virginica). Evolution, Lawrence, Kansas 32: 342–353
Zouros, E. (1987). On the relation between heterozygosity and heterosis: an evaluation of the evidence from marine mollusks. Curr. Topics biol. med. Res. 15: 255–270
Zouros, E., Foltz, D. W. (1984). Possible explanations of heterozygote deficiency in bivalve molluscs. Malacologia 25: 583–591
Zouros, E., Singh, S. M., Miles, H. E. (1980). Growth rate in oysters: an overdominant phenotype and its possible explanations. Evolution, Lawrence, Kansas 34: 856–867
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Communicated by J. M. Mauchline, Oban
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Gosling, E.M. Genetic heterozygosity and growth rate in a cohort of Mytilus edulis from the Irish coast. Marine Biology 100, 211–215 (1989). https://doi.org/10.1007/BF00391960
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DOI: https://doi.org/10.1007/BF00391960