Mitochondrial, but not rDNA, genes fail to discriminate dinoflagellate species in the genus Ostreopsis
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AuthorsPenna, A. (Antonella); Battocchi, C. (Cecilia); Capellacci, S. (Samuela); Fraga, S. (Santiago); Aligizaki, K. (Katerina); Lemée, R. (Rodolphe); Vernesi, C. (Cristiano)
The marine dinoflagellate genus Ostreopsis includes species producing potent toxic compounds, such as paliytoxin and palytoxin analogs, which might cause problematic blooms in the Mediterranean Sea and other tropical or temperate areas. Phylogenetic and phylogeographical studies based on sequences of ribosomal genes, revealed the existence of distinct species and, within them, clades in relation to geographical distribution potentially representing new or cryptic species. The morphological variability of Ostreopsis complicates the identification of species; thus, molecular analyses of isolates or field samples can be helpful. The aim of this study was to improve the characterization of Ostreopsis species and investigate the geographical distribution by using large dataset composed of both new and old sampled isolates. To determine if mitochondrial genes can be used to identify Ostreopsis species, we designed new primers sets then amplified and sequenced representative regions of the COI ...
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