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Molecular evidence for the existence of two species of Marteilia in Europe

F. Le Roux 1 G. Lorenzo P. Peyret C. Audemard A. Figueras C. Vivares Manolo Gouy 2 F. Berthe 1 
1 LGP - Laboratoire de Génétique et Pathologie
AGSAE - Amélioration génétique, du contrôle des performances et de la santé des mollusques marins
Abstract : Marteilia refringens is one of the most significant pathogens of bivalve molluscs. Previous sequencing of the small subunit ribosomal RNA gene of M. refringens isolates derived from the infected mussels (Mytilus edulis and Mytilus galloprovinciallis) and the oyster (Ostrea edulis) in Europe did not reveal genetic polymorphisms despite indications from epizootiological data that distinct types may exist. We investigated the existence of polymorphisms in the internal transcribed spacer region of the ribosomal RNA genes. The sequences of this region proved to be clearly dimorphic among Marteilia from five sampling sites. The distribution of the two genetic types, named “O” and “M”, appeared to be linked to the host species, oysters and mussels, respectively. We therefore support the recognition of two species of Marteilia in Europe and propose that the “O” type corresponds to M. refringens and the “M” type to M. maurini.
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Submitted on : Wednesday, October 28, 2009 - 4:52:57 PM
Last modification on : Saturday, September 24, 2022 - 2:36:04 PM

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F. Le Roux, G. Lorenzo, P. Peyret, C. Audemard, A. Figueras, et al.. Molecular evidence for the existence of two species of Marteilia in Europe. Journal of Eukaryotic Microbiology, Wiley, 2001, 48 (4), pp.449-454. ⟨10.1111/j.1550-7408.2001.tb00178.x⟩. ⟨hal-00427181⟩



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