Agrobacterium에 의한 오이 형질전환에서 자엽절 절편의 이용
The use of cotyledonary-node explants in Agrobacterium tumefaciensmediated transformation of cucumber (Cucumis sativus L.)
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초록
Agrobacterium과 자엽절 절편 공동배양으로 오이 형질전환체를 생산하였다. 오이 자엽절 절편 (c.v. Eunsung)은 선발 마커로서 nptII유전자와 유용유전자로서 DQ유전자가포함된 pPZP211를 EHA101에 형질전환하여 공동 배양하였다. 3회 반복실험으로부터 평균 형질전환 빈도는 4.01%를, 최대 빈도는 5.97%를 보여 주었다. Paromomycin항생제 저항성을 갖는 9개의 식물체를 선발과정을 통해 얻었으며, Southern blot 분석에 의해 6개 식물체의 genome에nptII유전자자 안정적으로 도입되어 있음을 확인할 수 있었다.
Abstract
Agrobacterium tumefaciens-mediated cotyledonary-node explants transformation was used to produce transgenic cucumber. Cotyledonary-node explants of cucumber (Cucumis sativus L. cv., Eunsung) were co-cultivated with Agrobacterium strains (EHA101) containing the binary vector (pPZP211) carrying with CaMV 35S promoter-nptII gene as selectable marker gene and 35S promoter-DQ gene (unpublished data) as target gene. The average of transformation efficiency (4.01%) was obtained from three times experiments and the maximum efficiency was shown at 5.97%. A total of 9 putative transgenic plants resistant to paromomycin were produced from the cultures of cotyledonary-node explants on selection medium. Among them, 6 transgenic plants showed that the nptII gene integrated into each genome of cucumber by Southern blot analysis.
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