Marine Biology

, Volume 24, Issue 1, pp 85–91 | Cite as

The genetic basis of morphological differentiation in some Laminaria populations

  • A. R. O. Chapman


Clinal differentiation of stipe traits in Laminaria (simplices) populations occurs on a gradient of exposure to wave action. Crossability tests and the production of fertile hybrids established interfertility between populations from the extremes of the morphological range. Reciprocal transplantation experiments between exposed and sheltered sites did not produce significant changes in stipe morphology. Quantitative genetic analysis of the degree of resemblance between relatives indicated a relatively high genetic component in the interpopulation differentiation. This is consistent with the results of the transplantation experiments. Within-population heritability estimates at the exposed site were low, perhaps because of intensive local stabilising selection which acts to reduce genetic variability. The question of conspecificity of L. saccharina and L. longicruris in view of these results is discussed.


Genetic Analysis Genetic Variability Genetic Basis Genetic Component Saccharina 
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Literature Cited

  1. Antonovics, A. and A. D. Bradshaw: Evolution in closely adjacent plant populations, VIII. Clinal patterns at a mine boundary. Heredity, Lond. 25, 349–362 (1970).Google Scholar
  2. Bogyo, T.: Coefficients of variation of heritability estimates obtained from variance analysis. Biometrics 20, 122–129 (1964).Google Scholar
  3. Bradshaw, A. D., T. S. McNeilly and R. P. G. Gregory: Industrialization, evolution and the development of heavy metal tolerance in plants. In: Ecology and the industrial society, pp 327–343. Ed. by G. T. Goodman, R. W. Edwards and J. M. Lambert. Oxford: Blackwells 1964.Google Scholar
  4. Chapman, A. R. O.: Methods for macroscopic algae. In: Handbook of phycology, pp 87–104. Ed. by J. R. Stein. Cambridge: University Press 1973a.Google Scholar
  5. —: Phenetic variability of stipe morphology in relation to season, exposure and depth in the non-digitate complex of Laminaria Lamour. (Phaeophyta, laminariales) in Nova Scotia. Phycologia 12, 53–57 (1973b).Google Scholar
  6. Falconer, D. S.: Introduction to quantitative genetics, 365 pp. New York: Ronald Press 1960.Google Scholar
  7. Fang, T. C., B. Y. Jiang and J. J. Li: On the inheritance of stipe length in Haidai (Laminaria japonica Aresch.) Acta bot. sin. 10, 327–335 (1962).Google Scholar
  8. —, C. Y. Wu, B. Y. Jiang, J. J. Li and K. Z. Ren: The breeding of a new variety of Haidai (Laminaria japonica Aresch.). Scientia sin. 12, 1011–1018 (1963).Google Scholar
  9. Hanover, J. U.: Genetics of terpenes 1. Gene control of monoterpene levels in Pinus monticola Dougl. Heredity, Lond. 21, 73–83 (1966).Google Scholar
  10. Jain, S. K. and A. D. Bradshaw: Evolutionary divergence among adjacent plant populations. I. The evidence and its theoretical analysis. Heredity, Lond. 21, 407–441 (1966).Google Scholar
  11. Kemp, L. and K. Cole: Chromosomal alternation of generations in Nereocystis luetkeana (Mertens) Postels & Ruprecht. Can. J. Bot. 39, 1711–1724 (1961).Google Scholar
  12. McLachlan, J.: Growth media — marine. In: Handbook of phycology, pp 25–51. Ed. by J. R. Stein. Cambridge: University Press 1973.Google Scholar
  13. Schreiber, E.: Untersuchungen über Parthenogenesis, Geschlechtsbestimmung und Bastardierungsvermögen bei Laminarien. Planta 12, 331–353 (1930).Google Scholar
  14. Sokal, R. R. and F. J. Rohlf: Biometry. The principles and practice of statistics in biological research, 776 pp. San Francisco: W. H. Freeman 1969.Google Scholar
  15. Sundene, O.: The ecology of Laminaria digitata in Norway in view of transplant experiments. Nytt. Mag. Bot. 2, 83–107 (1964).Google Scholar
  16. Svendsen, P. and K. M. Kain: The taxonomic status, distribution, and morphology of Laminaria cucullata sensu Jorde and Klavestad. Sarsia 46, 1–22 (1971).Google Scholar
  17. Urquart, C.: Genetics of lead tolerance in Festuca ovina. Heredity, Lond. 26, 19–33 (1971).Google Scholar
  18. Wilce, R. T.: Studies in the genus Laminaria III. A revision of the North Atlantic simplices section of Laminaria. In: Proceedings of the 5th Marine Biological Symposium, pp 247–256. Ed. by T. Levring. Göteborg: Elanders Boktryckeri AB 1965.Google Scholar

Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • A. R. O. Chapman
    • 1
  1. 1.Department of BiologyDalhousie UniversityHalifaxCanada

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