식물조직배양학회지 (Korean Journal of Plant Tissue Culture)

한국식물생명공학회 (The Korean Society of Plant Biotechnology)
권호 표지

옥수수 전위유전자 Ac 및 Ds의 2배체종 감자 Genome 내로의 도입

Introduction of Maize Transposable Elements, Ac and Ds into the Genome of a Diploid Potato Species

  • 김화영 (강릉대학교 생명과학대학 원예학과) ;
  • 임용표 (충남대학교 농과대학 원예학과)
  • 발행 : 2000.01.01
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초록

전위유전자 표지를 이용한 2배체 야생근연종 감자의 유용 유전자 cloning 체계를 개발하기 위하여 옥수수의 진위유전자 Ac를 조작하여 전위효소는 생산하나 이동은 불가능하도록 제작된 immobilized Ac (iAc)와 자체 이동은 불가능하나 iAc의 작용에 의해 이동이 가능한 Ds를 Agrobacterium tumefaciens를 이용한 형질전환에 의해 2배체 근연종 감자 (Solanum tuberosum Group Phureja) 계통 1.22에 도입하였다. iAc및 Ds 삽입 binary vector들을 보유하는Agrobacterium 계통들로 형질전환 처리된 1.22 기내배양신초의 잎과 줄기 절편의 경우 50mg/L 의 kanamycin이 첨가된 배지에서도 캘러스를 형성하였으며, 잎 절편으로부터 재분화신초가 획득되었다. 형질전환 처리되지 않은 1.22 신초는 100mg/L의 kanamycin이 첨가된 배지에서 전혀 발근이 되지 않았으나, 형질전환 처리에 의해 획득된 재분화 신초는 동일 배지에서 발근이 되었다. iAc와 Ds의 염기배열에 대해 특이적인 oligonucleotide primer들을 이용하여 형질전환 처리 획득 식물들로부터 추출된 DNA에 대한 PCR분석을 실시한 결과, 사용된 primer들의 iAc 와 Ds의 염기배열에 있어서의 위치에 의해 예상되는 크기의 DNA들이 형성되어 iAc 와 Ds의 1.22 genome내 도입이 확인되었다.

Two maize transposable elements, immobilized Ac (iAc) and Ds, have been introduced into the genome of a diploid potato clone (Solanum tuberosum Group Phureja clone 1.22). The iAc is a modified Ac that is supposed to be unable to transpose but is expected to trans-activate the transposition of a Ds that is unable to transpose by itself. When the leaf and stem explants of in vitro shoots of the clone 1.22 were inoculated with Agrobacterium tumefaciens strains harboring binary vectors containing the iAc and the Ds, calli were formed from the explants on media containing 50 mg/L of kanamycin, and shoots were regenerated from the calli. The regenerated shoots formed roots when cultured on media containing 100 mg/L of kanamycin, whereas untransformed shoots did not form roots on the same media. The PCR amplification of the DNA's from the transgenic plants confirmed that the iAc and the Ds elements were introduced into the potato genome of 1.22.

키워드

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