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Sexual Compatability and Species Concept in Ectocarpus Siliculosus (Ectocarpales, Phaeophyceae) from Italy, North Carolina, Chile, and New Zealand

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Evolutionary Biogeography of the Marine Algae of the North Atlantic

Part of the book series: NATO ASI Series ((ASIG,volume 22))

Abstract

Several sexual strains of Ectocarpus with differing morphology originating from the Mediterranean, NW Atlantic, SE and SW Pacific were studied under culture conditions. The sporophytic and gametophytic phases are anisomorphic to a varying degree and both show morphological variation primarily dependent upon temperature. In crossing experiments zygotes formed in all combinations of strains, however, the viability of hybrids between northern and southern strains was reduced. In some crosses the hybrids were incapable of forming intact meio-sporangia but showed normal mitotic spore formation. These strains are considered to be members of one species Ectocarpus siliculosus, which is divided into geographical races or subspecies. They are sexually isolated, but can form hybrids, which are fertile on the basis of mito-sporangia.

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Author information

Authors and Affiliations

  1. Fakultät für Biologie, Universität Konstanz, D-7750, Konstanz 1, West Germany

    Birgit Stache

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  1. Birgit Stache
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Editors and Affiliations

  1. Department of Biology, St. Francis Xavier University, Antigonish, Nova Scotia, B2G 1C0, Canada

    David J. Garbary

  2. Huntsman Marine Science Centre, St. Andrews, New Brunswick, EOG 2X0, Canada

    G. Robin South

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© 1990 Springer-Verlag Berlin Heidelberg

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Stache, B. (1990). Sexual Compatability and Species Concept in Ectocarpus Siliculosus (Ectocarpales, Phaeophyceae) from Italy, North Carolina, Chile, and New Zealand. In: Garbary, D.J., South, G.R. (eds) Evolutionary Biogeography of the Marine Algae of the North Atlantic. NATO ASI Series, vol 22. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-75115-8_9

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  • DOI: https://doi.org/10.1007/978-3-642-75115-8_9

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-75117-2

  • Online ISBN: 978-3-642-75115-8

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