Abstract
Random amplified polymorphic DNA (RAPD) analysis was used to discriminate genotypes in five species of Microcystis cyanobacteria. Strains of each group with the identical allozyme genotype (T. Kato et al., Algol. Stud., 1991, 129-140; M. Watanabe, in "Toxic Microcystis," ed. by M.F. Watanabe et al., CRC Press, Tokyo, 1966, pp. 13-34) gave similar RAPD patterns characterizing the respective group. On the other hand, no similarities in RAPD patterns were observed among strains of which allozyme genotypes were different. A good accordance between the RAPD analysis and allozyme divergence indicated a high reliability of both methods for discrimination of the affiliated groups of Microcystis. Several amplified DNA fragments, which were expected to be markers for a particular taxon with identical allozyme genotype, were also observed on the RAPD patterns. Genetic homogeneities of M. novacekii, M. viridis, and M. wesenbergii were shown by RAPD analysis as well as the allozyme genotype. However, significant variations were observed in M. aeruginosa and M. ichthyoblabe in the levels of DNA and proteins (allozymes).
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