Mycobiology.  2000 Jun;28(2):93-96.

Genetic Relatedness of Korean Isolates of Pythium Using Restriction Fragment Length Polymorphism of PCR Amplified Ribosomal DNA and M-13 Marker

  • 1Division of Biological Sciences, Medical College, Konyang University, Non-sun City, Chung-Nam, Korea.
  • 2Deparment of Environmental Horticulture, Seoul City University, Seoul, Korea.


Twenty-five isolates of Pythium species were identi6ed and classified on the basis of RFLP(restriction fragment length polymorphism) of ITS(internal transcribed spacer) region in ribosomal DNA. and M-13 PCR markers. Eight restriction endonucleases were used to investigate the genetic relatedness among isolates P. graminicola and P. arrhenomanes as well as P. aphanidermatum and P. delience produced identical band patterns with all restriction endonucleases used and M-13 markers. P. myriotylum and P. catenulatum also formed tight cluster on the basis of RFLP of ribosomal DNA but produced distinct band pattern with M-13 PCR markers. No intraspecitic variations were observed with RFLP of ITS region in ribosomal DNA. Molecular analysis based on M-13 marker demonstrated that each species produced distinct band patterns. Intraspecific variation of P. ultimum and P. torulosum was observed with M-13 markers.


Pythium; Genetic relatedness; Restriction fragment length polymorphism; Internal transcribed spacer; ribosomal DNA; M-13 marker

MeSH Terms

DNA Restriction Enzymes
DNA, Ribosomal*
Polymerase Chain Reaction*
Polymorphism, Restriction Fragment Length*
DNA Restriction Enzymes
DNA, Ribosomal
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