The Korean Journal of Mycology (한국균학회지)

The Korean Society of Mycology (한국균학회)
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Distribution and Alteration of Mating Type of Phytophthora capsici Population from Red Pepper in Korea

국내 고추역병균 Phytophthora capsici 집단의 교배형 분포 및 변화

  • 송정영 (충남대학교 농업생명과학대학 농생물학과) ;
  • 유성준 ((주)바이오쉴드) ;
  • 김홍기 (충남대학교 농업생명과학대학 농생물학과)
  • Published : 2002.10.30
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Abstract

Distribution and alteration of mating type of Korean population for Phytophthora capsici were monitored from 1995 to 1998. Total 973 isolates collected from 75 pepper fields throughout the country were divided into A1 mating type 573 isolates and A2 mating type 400 isolates. Both mating types were founded in all provinces examined, but the distribution patterns differed between the fields, The single mating type of A1 or A2 isolates was found in some fields, whereas various combinations of both mating types were in all years and provinces surveyed. Ratios of A1 and A2 were varied with years and fields. However, only single mating type either A1 or A2 was detected in some fields. While, in another field located in Gongju, only A2 isolates were detected in 1995 and 1997, but A1 isolates were appeared in 1998. Varied ratios and alterations of A1 and A2 mating type in fields indicate a potential sexual recombination of the fungus, which may cause genetic diversity.

1995년부터 1998년 사이 국내에 분포하는 고추역병균 Phytophthora capsici 집단에 대해 A1과 A2 교배형의 발생분포 및 변화를 조사하였다. 전국의 75개 고추포장들로부터 분리된 973개 P. capsici 균주들의 A1 : A2 교배형 발생비는 573 : 400으로 나타났다. A1과 A2 교배형의 P. capsici 균주들은 조사를 실시한 모든 지방에서 발견되었다. 조사포장별로는 A1 또는 A2 교배형의 병원균들만이 분리된 포장들과 A1과 A2 교배형의 병원균들이 동시에 발생하는 포장들이 관찰되었으며, 각 단일 포장내 P. capsici 균주들의 A1 : A2 교배형 발생비율은 해마다 다양하게 나타났다. 한편, 동일 포장에서의 연차적인 교배형 발생비 추이를 조사한 결과 1995년과 1997년에 A2 교배형의 P. capsici만이 발생했던 공주포장에서는 1998년에 A1 교배형의 균주가 새롭게 발견되었다. 따라서 국내 고추 역병균 P. capsici 집단은 병발생 포장단위별로 다양한 A1 : A2 교배형 균주들의 발생비가 나타나고 있어 단일포장 내에서 유성생식이 이루어질 가능성이 높으며, 포장단위별 균주들 간에는 유전적인 차이가 다양하게 존재할 것으로 판단된다.

Keywords

References

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