Korean Journal of Agricultural and Forest Meteorology (한국농림기상학회지)

Korean Society of Agricultural and Forest Meteorology (한국농림기상학회)
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Genetic Changes of Cornus controversa with Ozone Exposure

오존 노출에 의한 층층나무의 유전특성 변화

  • 장석성 (임업연구원 산림유전자원부) ;
  • 이석우 (임업연구원 산림유전자원부) ;
  • 이재천 (임업연구원 산림유전자원부) ;
  • 한심희 (임업연구원 산림유전자원부) ;
  • 김홍은 (충북대학교 산림과학부)
  • Published : 2003.12.01
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Abstract

To examine the effects of ozone (O$_3$), one of the major air pollutants in the city area, on genetic changes in Cornus controversa Hemsl., we compared genetic structures between sensitive (S) and tolerant (T) tree groups of C. controversa fumigated with ozone using isozyme markers. The genetic structures were measured in terms of allele and genotype frequencies determined at ave polymorphic enzyme loci. Marked genetic differences between the two groups were detected at three loci (Lap-2, Mdh-1 and Skdh-1). Genetic parameters, genetic multiplicity, genetic diversity and heterozygosity showed that the tolerant group retained greater genetic variation than did the sensitive group. Results of the study were congruent with the general expectation that the more heterozygous individuals and/or populations exhibit higher resistance to various stress factors.

도심지 주요 대기 오염원 가운데 하나인 오존이 층층나무의 유전구조에 미치는 영향을 조사하기 위하여 오존 처리에 대해서 생장이 건강한 내성 그룹과 피해가 심한 감수성 그룹을 선발한 후 동위효소 분석에 의한 유전구조를 비교하였다. 두 그룹간 유전구조의 차이는 5개 다형적 유전자좌에서 관측된 대립유전자 빈도 및 유전자정 빈도의 비교에 의해서 이루어졌다. 분석 결과 3개 유전자좌(Lap-2, Mdh-1, Skdh-1)에서 두 그룹간에 통계적으로 유의한 차이가 관측되었다. 내성그룹의 경우 유전적 다수도, 유전적 다양도, 이형접합도 등 유전적 다양성을 추정하기 위한 모든 통계치에서 감수성 그룹에 비해 높은 값을 나타냈다. 본 연구 결과는 유전적으로 다양한 개체 또는 집단이 그렇지 않은 개체나 집단에 비해서 환경 스트레스에 대해 저항성이 크다는 일반적인 가설에 잘 부합하는 것으로 나타났다.

Keywords

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