Abstract
A method is described for isolating high molecular weight DNA from somatic tissue of soft corals. The method avoids problems associated with the presence of nucleases, pigments and other secondary metabolites in soft corals. Tissue is frozen in liquid nitrogen, pulverized with a pestle and mortar, and the powder extracted with buffered sodium dodecyl sulphate at 4°C in the presence of phenol/chloroform. This technique has been applied toAlcyonium, Sinularia, Sarcophyton andLobophytum species. Repeated sequences have been cloned fromAlcyonium sp., and used to probe slot-blots of genomic DNA and Southern blots of restriction digests. Homologous repeated sequences were detected in threeAlcyonium sp., but not in threeSinularia sp., despite these genera being closely related.
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