Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Haplotype Diversity and Gene Flow of the Diamondback Moth, Plutella xylostella(L.) (Lepidoptera: Yponomeutidae), in Korea

배추좀나방(나비목: 집나방과)의 haplotype 다양성과 유전자 이동률

  • 김익수 (동아대학교 생명자원과학대학) ;
  • 배진식 (동아대학교 생명자원과학대학) ;
  • 최광호 (동아대학교 생명자원과학대학) ;
  • 진병래 (동아대학교 생명자원과학대학) ;
  • 이경로 (건국대학교 이과대학 생물학과) ;
  • 손흥대 (동아대학교 생명자원과학대학)
  • Published : 2000.04.01
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Abstract

A portion of mitochondria1 COI gene (438 bp) was sequenced from the sampls of Plutella xylostella from four localities in Korea to investigate the population genetic structure and characteristics by measuring the magnitude of genetic diversity and the degree of gene flow among populations. Thirteen haplotypes ranging in nucleotide divergence 0.3% to 1.4%, were obtained from 21 individuals. The nucleotide divergence was similar to the other related studies, but haplotype diversity was substantially higher (mean h = 0.81). The genetic distance among geographically remote Cheju Island population and the two Kimhae populations, distant 1 lkm to each other, was not statistically significant (p<0.05). Instead, a substantial or high female gene flow was detected (Nm = 2-30). One Hawaiian haplotype of the diamondback moth obtained through GenBank search also was genetically similar to the ones obtained from this study. Collectively, the genetic population structure of the diamondback moth in Korea can be characterized into two aspects. First, the diamondback moths in Korea possesses overall moderate genetic divergence based on a high number of haplotypes. Second, a high haplotype diversity within each population due to the long distance dispersal with a substantial dispersal power and the resultant genetic similarity among geographic populations is characteristic.

국내 4개 지역으로부터 채집된 배추좀나방(Plutella xylostella)의 미토콘드리아 DNA중 COI 유전자 일부 (438 bp)의 염기서열을 결정, 유전적 다양도 및 유전자 이동정도를 파악함으로써 집단 유전적 구조 및 특성에 대하여 연구하였다. 총 21개체로부터 13개의 mtDNA haplotype을 얻었으며 이들의 변이는 0.3~1.4%로 다른 곤충을 대상으로 한 유사연구와 비슷한 크기를 나타내었으며 haplotype 다양도는 매우 높았다(평균 h=0.81). 지리적으로 먼 제주도의 개체군과 경남 김해 두 지역(11km 거리)의 개체군을 비교한 결과, 통계적으로 유의한 정도의 유전적 격리(p<0.05%)는 전혀 관찰되지 않았으며, 대신 상당한 정도의 세대당 암컷 이동률(Nm=2-30)을 보였다. 또한 GenBank에 등록된 하와이의 배추좀나방 haplotype은 본 연구에서 얻은 것들과 유전적으로 흡사하였다. 종합적으로, 국내 배추좀나방은 전체적으로는 많은 haplotype수에 기인한 적절한 크기의 유전적 분화율을 보유하고 있으며 국지적으로는 상당한 이동력에 의한 장거리 이동으로 개체군내 높은 haplotype 다양도를 보이며 동시에 지역간의 유전적 유사성을 나타낸다고 요약되었다.

Keywords

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