Phylogenetic position of sponges from Chagatai and Tore-Khol lakes |
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Authors: | O O Maikova V B Itskovich N A Semiturkina O V Kaluzhnaya S I Belikov |
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Institution: | 1.Limnological Institute,Russian Academy of Sciences,Irkutsk,Russia |
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Abstract: | Morphological and molecular genetic data for freshwater sponges from the lakes of Tuva Depression, Baikalospongia dzhegatajensis (Rezvo, 1936), forms Dzh05 and Dzh06, from Chagatai Lake, as well as forms TKh1 and TKh2, from the Lake Tore-Khol, were obtained
and examined. In the sponges examined, which on phylogenetic tree clustered together with the Ephydatia fluviatilis (Linneaus, 1758) sponge from the family Spongillidae, the ITS rDNA regions were sequenced. Comparison of highly variable
interal spacer regions of the mitochondrial genome was performed using corresponding sequences of three sponges from the family
Spongillidae (E. fluviatilis, E. muelleri and Spongilla lacustris), sponges from the Chagatai and Tore-Khol lakes (Dzh06 and TKh2) with an unknown status, and sponges from the Baikalian family
Lubomirskiidae. Minimum genetic differences were observed between E. fluviatilis, Dzh06, and TKh2 (from 0.003 to 0.01% of nucleotide substitutions), while maximum differences were found between the species
of Lubomirskiidae and Spongillidae (from 0.928 to 2.06%). The data obtained indicated that sponges from Chagatai and Tore-Khol
lakes were most close to E. fluviatilis. |
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