Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Determination and Application of Combined Genotype of Simple Sequence Repeats (SSR) DNA Marker for Cultivars of Cymbidium goeringii

춘란(Cymbidium goeringii) 품종에 대한 Simple Sequence Repeats (SSR) DNA 마커의 복합 유전자형 결정과 적용

  • Lee, Dae-Gun (Department of Flower Design, Catolic University of Daegu) ;
  • Koh, Jae-Chul (Department of Flower Design, Catolic University of Daegu) ;
  • Chung, Ki-Wha (Department of Biological Science, Kongju National University)
  • 이대건 (대구가톨릭대학교 플라워디자인과) ;
  • 고재철 (대구가톨릭대학교 플라워디자인과) ;
  • 정기화 (공주대학교 생명과학과)
  • Received : 2012.01.16
  • Accepted : 2012.03.29
  • Published : 2012.06.30
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Abstract

Cymbidium goeringii is one of the most important and popular species in the orchid family in north-east Asia. In the present study, we prepared multiplex PCR system, and used it for the genotyping of eight simple sequence repeats (SSR) markers (CG409, CG415, CG709, CG722, CG787, CG1023, CG1210, and CG1281) in subject with 40 samples of cultivated varieties. All the analyzed samples showed different combined genotypes. The average combined power of discrimination was very high value of $7.14{\times}10^{-10}$, and observed heterozygosity (Ho = 0.466) was similar with two wild populations of C. goeringii, which may indicate no or little occurrence of genetic change after collection from wild habitats. The present study also developed a two-dimensional barcode to express information of genotype results of eight SSR markers (SSR DNA ID). The discrimination power of DNA ID between two individuals will be statistically more than 99.999999%. The SSR DNA ID and two-dimensional barcode may be very usefully applied for the discrimination and maintence of cultivars of C. goeringii.

춘란(Cymbidium goeringii)은 동북아시아에서 난류중에서 가장 잘 알려진 중요한 종이다. 본 연구에서는 8개의 simple sequence repeats(SSR) 마커(CG409, CG415, CG709, CG722,CG787, CG1023, CG1210, and CG1281)를 동시증폭할 수 있는 multiplex PCR 시스템을 개발하여, 춘란의 40품종에 대한 유전자형을 분석하하는데 활용하였다. 품종은 모든 품종은 서로 다른 복합 유전자형을 가졌으며, 개체간 평균 복합식별력은 $7.14{\times}10^{-10}$로 매우 높게 나타났다. 관찰 이형접합도(Ho = 0.466)는 한국 내 야생집단과 유사한 값(동해안: 0.438, 서해안: 0.583)을 보였는데, 이 사실은 각 품종이 원래 야생에서 채집되어 품종으로 등록된 후 영양번식을 통해 번식을 하면서 유전적 본질이 변형되지 않았음을 의미한다. 본 연구에서 아울러 확립한 8개의 SSR 마커의 복합 유전자형을 이용하여 SSR DNA ID를 2차원 바코드로 표현하는 프로그램을 개발하였다. 복합 유전자형을 사용하여 개발된 개체별 고유 DNA ID의 개체 식별력은 통계적으로 99.999999% 이상이 되므로 높은 정확도로 개체간 구분이 가능해진다. 본 연구에서 개발한 SSR DNA ID와 2차원 바코드는 춘란 품종간 식별, 유지 등에 유용하게 활용될 수 있을 것이다.

Keywords

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