Abstract
DNA barcoding has been successfully applied to a very large number of taxa, but remains problematic for basal diploblasts, and debates about suitable molecular markers are ongoing. Sea anemones (Anthozoa: Hexacorallia: Actiniaria) populate most any marine environment and often play an irreplaceable role as hosts to other animals. Three genetic markers were tested to assess their utility for molecular species identification in members of the Actiniaria, namely the cytochrome oxidase subunit I (COI), a COI Intron with a Homing Endonuclease Gene (HEG), and the Internal Transcribed Spacer II (ITS II). Both the power of COI and the COI Intron to distinguish species is limited by events of very low inter-specific sequence differences and not by high intra-specific diversity. This finding implies that more comprehensive taxon sampling will not resolve this problem and other markers need to be investigated in several families. Results should discourage the use of ITS II as alternative to COI for barcoding in Actiniarians, since it shows similar limitations to COI.
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Acknowledgments
We would like to thank the institutions and individuals that have made our study possible: German Federal Ministry of Education and Research (BMBF) (grant no. 03 F 0390B and 03 F 0472B), which funded this study in the framework of the SPICE project (Science for the Protection of Indonesian Coastal Marine Ecosystems); Agus Nuryanto (Jenderal Soedirman University, Indonesia) and Janne Timm (University of Bremen, Germany) for support during collection of samples; colleagues from Hasanuddin University (Indonesia) for logistical support during field work; The SPICE project is conducted and permitted under the governmental agreement between the BMBF and the Indonesian Ministry for Research and Technology (RISTEK), Indonesian Institute of Sciences (LIPI), Indonesian Ministry of Maritime Affairs and Fisheries (DKP), and Indonesian Agency for the Assessment and Application of Technology (BPPT).
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Communicated by P. Martinez Arbizu
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Dohna, T.A., Kochzius, M. Obstacles to molecular species identification in sea anemones (Hexacorallia: Actiniaria) with COI, a COI intron, and ITS II. Mar Biodiv 46, 291–297 (2016). https://doi.org/10.1007/s12526-015-0329-5
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DOI: https://doi.org/10.1007/s12526-015-0329-5