Journal of Plant Biotechnology

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Agrobacterium-mediated transformation of Bacillus thuringiensis cry1Ac gene in chrysanthemum (Dendranthema grandiflorum Kitamura) 'Linneker Salmon'

국화(Dendranthema grandiflorum Kitamura) 'Linneker Salmon'에 Agrobacterium을 이용한 Bacillus thuringiensis cry1Ac 유전자의 형질전환

  • Han, Bong-Hee (Horticultural Biotechnology Division, National Horticultural Research Institute) ;
  • Lee, Su-Young (Horticultural Biotechnology Division, National Horticultural Research Institute) ;
  • Lim, Jin-Hee (Floriculture Division, National Horticultural Research Institute)
  • Published : 2008.06.30
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Abstract

Cry1Ac gene was introduced into chrysanthemum (Dendranthema grandiflorum Kitamura) 'Linneker Salmon' through Agrobacterium-mediated gene transformation to develop new lines showing resistance to tobacco cutworm (Spodoptera litura). Cry1Ac gene was transferred into chrysanthemum by Agrobacterium C58C1 containing pCAMBIA2301. After infection of Agrobacterium C58C1 with leaf segments, the segments were cultured on regeneration medium (MS + 1.0 mg/L BA + 0.5 mg/L IAA) containing 10 mg/L kanamycin for the first selection, on the same medium containing 20 mg/L kanamycin for the second selection, and on rooting medium (MS basal medium) containing 20 mg/L kanamycin for the third selection. Until the third selection, sixty nine plantlets (1.6%) were survived and rooted. Thirty six ones (0.8%) among them were confirmed as putative transformants with nptll gene by nptll primer PCR, and 35 (0.8%) of 36 ones as transformants with nptll gene and cry1Ac gene by Southern analysis. The gene transformation efficiency of cry1Ac gene was favorable with 0.8%. The resistance of tobacco cutworm (Spodoptera litura) in chrysan-themum transformant introduced cry1Ac gene was tested in green house. Three transformants were confirmed to have resistance to tobacco cutworm.

국화에 담배거세미 나방 (tobacco cutworm; Spodoptera litura)에 저항성을 나타내 국화를 육성하기 위하여 cry1Ac 유전자를 형질전환하였다. Cry1Ac 유전자는 pCAMBIA2301를 포함하는 Agrobacterium C58C1을 통하여 국화 'Linneker salmon'에 도입하였다. Agrobacterium C58C1을 접종한 후 엽절편을 10 mg/L kanamycin이 함유된 재분화 배지 (MS + 1.0 mg/L BA + 0.5 mg/L IAA)에서 1차 선발을 하였고, 재분화 배지에 20 mg/L kanamycin이 첨가된 배지에서 2차 선발을 하였으며, 20 mg/L kanamycin이 첨가된 MS 배지에서 3차 발근선발을 하였다. 3차 발근선발까지 69개의 신초 (1.6%)가 생존하여 발근하였다. NptII primer로 PCR을 한 결과 그 중 36개의 신초 (0.8%)가 putative transformant로 확인되었고, Southern 분석을 한 결과, 35개체 (0.8%)가 nptII 유전자와 cry1Ac 유전자를 가진 형질전환체로 확인되었다. Cry1Ac 유전자의 형질전환율은 0.8%로 양호하였다. 온실에서 담배거세미 나방에 대한 저항성을 검정한 결과, 3개체의 형질전환체가 저항성을 나타내는 것으로 확인되었다.

Keywords

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