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Current status on the molecular biological research for the origin of cultivated sweetpotato [Ipomoea batatas L. (Lam)]

재배종 고구마[Ipomoea batatas L. (Lam)]의 기원종에 관한 분자생물학적 연구 동향

  • Lee, Shin Woo (Department of Plant & Biomaterials Science, Chilam Campus, Gyeongsang National University) ;
  • Kim, Yun-Hee (Department of Biology Education, College of Education, IALS, Gyeongsang National University)
  • 이신우 (경상국립대학교, 생명과학대학, 항노화신소재과학과) ;
  • 김윤희 (경상국립대학교, 사범대학, 생물교육과(농업생명과학연구원))
  • Received : 2021.10.15
  • Accepted : 2021.12.10
  • Published : 2021.12.31

Abstract

Several hypotheses for the origin of cultivated sweetpotato [Ipomoea batatas L. (Lam)] have been suggested but the exact progenitor is still unknown. Based on the results of RFLP patterns, microsatellite markers, SNP markers, FISH analyses, and genome analyses of haplotypes, wild species belonging to batatas group, I. trifida, I. leucantha, I. littoralis, I. tabascana, I. tenuissima, I. tiliacea, and I. triloba have been suggested as a progenitor. However, recently, advanced genomic technologies and characterization of the inserted T-DNA fragments of Agrobacterium in the genome of cultivated sweetpotato and wild species through horizontal gene transfer suggest that there may be an older progenitor than the wild species suggested so far.

재배종 고구마 [Ipomoea batatas L. (Lam)]의 정확한 기원종은 아직 밝혀지지 않았으며 다양한 가설들이 보고되었다. 재배종과 동일한 batatas 그룹에 속한 야생종을 대상으로 RFLP 패턴, microsatellite 마커, SNP 마커, FISH 기법, 반수체에 대한 게놈분석 등의 비교 연구에 의하면 I. trifida, I. leucantha, I. littoralis, I. tabascana, I. tenuissima, I. tiliacea, I. triloba 등이 가능성이 있는 것으로 제안되었다. 그러나, 최근의 진보된 유전체분석기술과 자연상태에서 수평전이현상에 의하여 재배종 고구마 및 다양한 야생종들의 염색체 내 삽입된 T-DNA의 유전자 구조, 삽입위치, 유전자 재배열 등의 특성을 조사한 연구 결과들을 종합하여 보면 기존에 제안된 이들보다 오래된 조상종이 존재할 것이라는 새로운 가설이 제시되었다.

Keywords

References

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