둥굴레속 식물의 18S rDNA 염기서열의 특성

Characterization of 18S rDNA in Polygonatum spp. Collections

  • 윤종선 (충북농업기술원 시험연구부) ;
  • 김익환 (충북농업기술원 시험연구부) ;
  • 박재성 (충북농업기술원 시험연구부) ;
  • 이철희 (충북농업기술원 시험연구부) ;
  • 홍의연 (충북농업기술원 시험연구부) ;
  • 윤태 (충북농업기술원 시험연구부) ;
  • 정승근 (충북대학교 식물자원학과)
  • Yun, Jong-Sun (Experiment & Research Department, Chungbuk Agricultural Research and Extension Service) ;
  • Kim, Ik-Hwan (Experiment & Research Department, Chungbuk Agricultural Research and Extension Service) ;
  • Park, Jae-Seong (Experiment & Research Department, Chungbuk Agricultural Research and Extension Service) ;
  • Lee, Cheol-Hee (Experiment & Research Department, Chungbuk Agricultural Research and Extension Service) ;
  • Hong, Eui-Yon (Experiment & Research Department, Chungbuk Agricultural Research and Extension Service) ;
  • Yun, Tae (Experiment & Research Department, Chungbuk Agricultural Research and Extension Service) ;
  • Jong, Seung-Keun (Dept. of Plant Resources, Chungbuk National University)
  • 발행 : 2006.06.30

초록

둥굴레 유전자원의 유연관계를 위한 기초 자료를 얻고자 둥굴레속 식물 수집종 10종에서 18S ribosomal RNA를 암호화하는 18S rDNA 영역의 염기서열을 결정하고 그 특성을 분석한 결과를 요약하면 다음과 같다. 둥굴레속 10종의 18S rDNA 영역 전체의 길이는 $913{\sim}914bp$로 비슷하였으나, 총 8개 지점에서 염기의 치환 및 결실에 의한 변이가 발생하였다. 전위는 $T{\rightarrow}C$전위가 4개 지점에서 발생하였고, $A{\rightarrow}G$ 전위가 1개 지점에서 발생하였으며, 전좌는 $C{\rightarrow}A$ 전좌가 1개 지점에서 발생하여 전위가 전좌보다 5배 만큼 발생하였다. 결실은 2개 지점에서 발생하였다. 18S rDNA의 염기의 조성은 adenine $23.09{\sim}23.33%$, guanine $23.33{\sim}23.52%$, thymine $25.60{\sim}25.85%$, cytosine $27.38{\sim}27.79%$로 pyrimidine계가 purine계보다 많았다. 18S rDNA의 A + T 함량은 $48.80{\sim}49.18%$로 평균 48.99%였고, G+C 함량은 $50.82{\sim}51.20%$로 평균51.01%였다. 다중 정렬에 의해 염기서열을 비교한 결과 $99.7{\sim}100%$ 일치하여 종간에 차이가 적었다.

This study was conducted to investigate the variation in sequence, the base composition and the sequence similarity of 18S rDNA (18S ribosomal RNA coding region) in the 10 Polygonatum spp. collections. The entire 18S rDNA region of 10 Polygonatum spp. collections ranged from 913 bp to 914 bp. There were 8 variable sites in the entire 18S region, and they were attributable to nucleotide substitution and deletion. $T{\rightarrow}C$ transition happened in 4 sites, and $A{\rightarrow}G$ transition happened in 1 site. $C{\rightarrow}A$ transversion happened in 1 site, and deletion happened in 2 sites. Transition rates were five times that of transversion. Base compositions of 18S rDNA were $23.09{\sim}23.33%$ in adenine, $23.33{\sim}23.52%$ in guanine, $25.60{\sim}25.85%$ in thymine and $27.38{\sim}27.79%$ in cytosine. The A + T content of 18S rDNA of 10 Polygonatum spp. collections averages 48.99%, ranging from 48.80% to 49.18%, and the G + C content averages 51.01%, ranging from 50.82% to 51.20%. Pairwise sequence comparisons indicated that 18S rDNA sequence similarity ranged from 99.7% to 100%.

키워드

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