한국균학회지 (The Korean Journal of Mycology)

한국균학회 (The Korean Society of Mycology)
권호 표지

Fusarium oxysporum f. sp. lycopersici의 Electrophoretic Karyotype

Electrophoretic Karyotypes of Fusarium oxysporum f. sp. lycopersici

  • 김영태 (충남대학교 농과대학 농생물학과) ;
  • 김홍기 (충남대학교 농과대학 농생물학과)
  • Kim, Young-Tae (Department of Agricultural Biology, College of Agriculture, Chungnam National University) ;
  • Kim, Hong-Gi (Department of Agricultural Biology, College of Agriculture, Chungnam National University)
  • 발행 : 1999.04.30
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초록

한국, 일본 그리고 미국 등지에서 수집된 Fusarium oxysporum f. sp. lycopersici의 electrophoretic karyotype(EK)을 분석하고자 CHEF-DRII pulsed field gel electrophoresis system(Bio-Rad Laboratories, Melville, NY)으로 각 공시균의 chromosome sized DNA를 분리하였다. EK 분석에 적합한 CHEF gel electrophoresis 조건을 얻기 위해 전기영동 시간 및 전압 그리고 switching interval 등의 조건을 다양하게 바꾸어 가며 실험하였다. 그 결과 국내 균주에서 $0.76{\sim}6.41\;Mb$에 달하는 $9{\sim}11$개의 chromosome sized DNA가 분리되었으며 그 total genome size는 $35.29{\sim}38.92\;Mb$ 이었다. 또한 일본과 미국 균주로 부터 $1.24{\sim}6.85\;Mb$범위의 $9{\sim}11$개의 chromosome sized DNA가 분리되었고 그 total genome size는 $35.32{\sim}43.87\;Mb$ 이었다. 이와 같이 얻어진 각 공시균주의 EK는 chromosome sized DNA의 length range 및 total genome size에서 국내 균주와 외국 균주간의 차이를 잘 반영하였다. 또한 국내 균주의 chromosomal polymorphism은 그 변이가 적어 서로 동일하거나 유사하였으며 외국 균주와 뚜렷이 다른 chromosomal DNA pattern을 나타냈다.

Strains of Fusarium oxysporum f. sp. lycopersici isolated from Korea, Japan and U.S.A. were used for electrophoretic karyotype (EK) analysis. Chromosome separations on FastLane agarose gels (FMC BioProducts, Rockland, ME), called pulsed field gel electrophoresis (PFGE), were performed by CHEF-DRII apparatus (Bio-Rad Laboratories, Melville, NY) using TAE as a running buffer. To obtain optimal condition for separation of chromosome sized DNAs, variable running conditions such as field strengths, swithching intervals, and running time were applied in CHEF gel electrophoresis. We were able to resolve 9 to 11 chromosome sized DNAs ranging in size from 0.76 to 6.41 Mb in isolates from Korea and estimate that the total genome size was ranging from 35.29 to 38.92 Mb. Distinct differences in length range and genome size exist among isolates from different countries. Isolates from Japan and U.S.A. were resolved 9 to 11 chromosome sized DNAs ranging in size from 1.24 to 6.85 Mb and estimated that the total genome size was ranging from 35.32 to 43.87 Mb. Isolates from variable provinces in Korea had the same or similar chromosomal polymorphism and showed different chromosomal DNA patterns compared to isolates from the other countries.

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