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Chromosome numbers of Gracilaria foliifera and Gracilaria sp. (Rhodophyta) and attempted hybridizations*

  • J. McLachlan (a1), J. P. Van Der Meer (a1) and N. L. Bird (a1)

Extract

Two species of Gracilaria, G. foliifera (Forsk.) Børg. and G. verrucosa (Huds.) Papenf., have been recorded from the Maritime provinces of Canada (South & Cardinal, 1970), although in recent years only G. foliifera var. foliifera is listed (South, 1976). These species are also known from the British Isles (Parke & Dixon, 1976). Chromosome counts of G. foliifera (Greig-Smith, 1954: as G. multipartita) and of G. verrucosa (Magne, 1964) from the European flora suggest these are distinct species.

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References

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Bird, C. J., Edelstein, T. & McLachlan, J., 1977. Studies on Gradlaria. Occurrence in Atlantic Canada, with particular reference to Pomquet Harbour, Nova Scotia. Naturaliste canadien. (In the Press.)

Bird, N. L., McLachlan, J. & Grund, D., 1977. Studies on Gradlaria. In vitro life history of Gradlaria sp. from the Maritime provinces. Canadian Journal of Botany, 55, 12821290.

Chapman, A. R. O., Edelstein, T. & Power, P. J., 1977. Studies on Gradlaria. I. Variations in populations from the lower Gulf of St Lawrence and New England. Botanica marina (In the Press).

Edelstein, T., McLachlan, J. & Craigie, J. S., 1967. Investigations of the marine algae of Nova Scotia. 2. Species of Rhodophyceae new or rare to Nova Scotia. Canadian Journal of Botany, 45, 193202.

Greig-Smith, E., 1954. Cytological observations on Gradlaria multipartita. Phycological Bulletin, 1(2), 45.

Harvey, H. W., 1846. Phycologia Britannica, vol. 1, pls. 172. London: Reeve & Benham.

McLachlan, J. & Edelstein, T., 1977. Life history and culture of Gradlaria foliifera (Forsk.) Børg. from South Devon. Journal of the Marine Biological Association of the United Kingdom, 57, 577586.

Magne, F., 1964. Recherches caryologiques chez les Floridées (Rhodophycées). Cahiers de biologie marine, 5, 461671.

Newton, L., 1931. A Handbook of the British Seaweeds. 478 pp. London: British Museum (Natural History).

Parke, M. & Dixon, P. S., 1976. Check-list of British marine algae - third revision. Journal of the Marine Biological Association of the United Kingdom, 56, 527594.

Phillips, R. W., 1925. On the origin of the cystocarp in the genus Gradlaria. Annals of Botany, 39, 787803.

Smith, L., 1947. The acetocarmine smear technique. Stain Technology, 22, 1731.

South, G. R., 1976. A check-list of marine algae of eastern Canada - first revision. Journal of the Marine Biological Association of the United Kingdom, 56, 817843.

South, G. R. & Cardinal, A., 1970. A check-list of marine algae of eastern Canada. Canadian Journal of Botany, 48, 20772095.

Sundene, O., 1975. Experimental studies on form variation in Antithamnion plumula (Rhodophyceae). Norwegian Journal of Botany, 22, 3542.

Taylor, W. R., 1957. Marine Algae of the Northeastern Coast of North America. 509 pp. Ann Arbor: University of Michigan Press.

Van Der Meer, J. P. & Bird, N. L., 1977. Genetics of Gradlaria sp. (Rhodophyceae, Gigartinales). 1. Mendelian inheritence of two spontaneous green mutants. Phycologia, 16, 159161.

Yamamoto, H., 1975. The relationship between Gradlariopsis and Gradlaria from Japan. Bulletin of the Faculty of Fisheries, Hokkaido University, 26, 217222.

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