Korean Journal of Plant Taxonomy (식물분류학회지)

The Korean Society of Plant Taxonomists (한국식물분류학회)
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Genetic variation and differentiation among populations of Euphorbia ebracteolata (Euphorbiaceae) in Korea

한국산 붉은대극(대극과) 집단의 유전적 변이와 분화

  • Cho, Young-Woo (Graduate School of Education, Kyungnam University) ;
  • Park, Ki-Ryong (Department of Science Education, Kyungnam University)
  • 조영우 (경남대학교 교육대학원) ;
  • 박기룡 (경남대학교 과학교육과)
  • Received : 2014.12.09
  • Accepted : 2015.02.11
  • Published : 2015.03.31
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Abstract

Using starch gel electrophoresis, ten isozyme loci were examined in nine populations of Euphorbia ebracteolata in Korea. Populations of E. ebracteolata tend to have higher within-population levels of genetic variation (A = 2.2, P = 61.1, He = 0.165) along with low levels of genetic differentiation ($F_{ST}$ = 0.075) compared to previously reported Euphorbia species. The relatively high genetic variation in E. ebracteolata may be due to its long-lived regional distribution and to the outcrossed nature of the species. Low levels of genetic differentiation and the absence of unique alleles in E. ebracteolata populations suggest that Korean populations diverged recently. This study does not support the recognition of var. coreana and for. magna as separate taxa, and suggests that they should be combined with E. ebracteolata.

한국산 붉은대극 9집단에 대해 전분전기영동법을 이용하여 10개의 동위효소 유전자 좌위를 조사하였다. 붉은대극 집단은 기존의 대극속 식물과 비교해 볼 때 상대적으로 높은 집단 내 유전적 변이(A = 2.2, P = 61.1, $H_e$ = 0.165)와 낮은 집단 간 분화($F_{ST}$ = 0.075) 양상을 보여주었다. 붉은대극에서 나타나는 이와 같은 높은 집단 내 유전적 변이는 이들이 갖고 있는 오래 생존하고, 지역적으로 분포하며, 타가수분에 의존하는 생식특성으로 설명할 수 있다. 한국산 붉은 집단에서 보여주는 매우 낮은 유전적 분화와 독특한 대립인자가 나타나지 않는 특징은 이들 집단이 최근에 분화되었을 가능성을 시사하며, 동위효소 자료로 볼 때, 기존에 기재된 종하분류군인 풍도대극(var. coreana)과 설악대극(for. magna)은 붉은대극 한 종으로 통합하는 것이 적절한 것으로 추정된다.

Keywords

References

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