Abstract
Two species of giant kelp inhabit the coast of Chile: Macrocystis integrifolia and M. pyrifera, representing important economic resources. As part of our efforts to domesticate these kelps for mariculture, and to obtain superior cultivars, we studied their biological relationship. Hybridization experiments with clonal gametophyte cultures showed reciprocal cross-fertility and produced fertile hybrid sporophytes with intermediate morphological characters. This hybridization potential in the laboratory contrasts with the persistence of two morphologically well-defined sister taxa in natural habitats on the Pacific coast of South America. We conclude that M. integrifolia and M. pyrifera are conspecific and speculate that unknown mechanisms support the co-existence of two morphologically distinct taxa on the subspecific level.
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References
Coyer JA, Smith GJ, Andersen RA (2001) Evolution of Macrocystis spp. (Phaeophyceae) as determined by ITS1 and ITS2 sequences. J Phycol 37:574–585
Druehl LD, Collins JD, Lane, CE, Saunders GW (2005) An evaluation of methods used to assess intergeneric hybridization in kelp using Pacific Laminariales (Phaeophyceae). J Phycol 41:250–262
Hoffmann A, Santelices B (1997) Flora marina de Chile Central. Ediciones Universidad Catolica de Chile, Santiago
Lane CE, Mays C, Druehl LD, Saunders GW (2006) A multi-gene molecular investigation of the Kelp (Laminariales, Phaeophyceae) supports substantial taxonomic re-organization. J Phycol 42:493–512
Lewis RJ, Neushul M (1994) Northern and southern hemisphere hybrids of Macrocystis (Phaeophyceae). J Phycol 30:346–353
Lewis RJ, Neushul M, Harger BWW (1986) Interspecific hybridization of the species of Macrocystis in California. Aquaculture 57:203–210
Neushul M (1971) The species of Macrocystis with particular reference to those of North and South America. In: WJ North (ed) Biology of giant kelp beds (Macrocystis) in California. Beih Nova Hedwigia 32. J Cramer Lehre, pp 211–222
Ramírez ME, Santelices B (1991) Catálogo de las algas marinas bentónicas de la costa temperada del Pacífico de Sudamérica. Monografías Biológicas No 5. Publicaciones Periódicas Pontificia Universidad Católica de Chile, Santiago
Westermeier R, Patiño D, Piel MI, Maier I, Müller D (2006) A new approach to kelp mariculture in Chile: Production of free-floating sporophyte seedlings from gametophyte cultures of Lessonia trabeculata and Macrocystis pyrifera. Aquaculture Res 37:164–171
Womersley HBS (1987) The marine benthic flora of southern Australia. Part II. Southern Australian Government Printing Division, Adelaide. pp 484
Acknowledgements
This work has been supported by FONDEF de CONICYT-CHILE, Projects D00I 1144 and D04I 1288. We thank Helga Müller, Constance for digital image processing, and anonymous reviewers for constructive remarks.
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Westermeier, R., Patiño, D. & Müller, D. Sexual compatibility and hybrid formation between the giant kelp species Macrocystis pyrifera and M. integrifolia (Laminariales, Phaeophyceae) in Chile. J Appl Phycol 19, 215–221 (2007). https://doi.org/10.1007/s10811-006-9126-7
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DOI: https://doi.org/10.1007/s10811-006-9126-7