한국환경농학회지 (Korean Journal of Environmental Agriculture)

  • 제40권3호
  • /
  • Pages.186-193
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  • 2021
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  • 1225-3537(pISSN)
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  • 2233-4173(eISSN)
한국환경농학회 (The Korean Society of Environmental Agriculture)
권호 표지
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Agrobacterium을 이용한 토마토 떡잎에서 CRISPR-Cas9 시스템의 임시발현 시 토마토 떡잎 발달 단계에 따른 유전자교정 효율 변화

Observation of Gene Edition by the Transient Expression of CRISPR-Cas9 System During the Development of Tomato Cotyledon

  • Kim, Euyeon (Department of Agricultural Chemistry, Chonnam National University) ;
  • Yang, So Hee (Department of Agricultural Chemistry, Chonnam National University) ;
  • Park, Hyosun (Department of Agricultural Chemistry, Chonnam National University) ;
  • Koo, Yeonjong (Department of Agricultural Chemistry, Chonnam National University)
  • 투고 : 2021.08.28
  • 심사 : 2021.09.23
  • 발행 : 2021.09.30
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초록

BACKGROUND: Before generating transgenic plant using the CRISPR-Cas9 system, the efficiency test of sgRNAs is recommended to reduce the time and effort for plant transformation and regeneration process. The efficiency of the sgRNA can be measured through the transient expression of sgRNA and Cas9 gene in tomato cotyledon; however, we found that the calculated efficiency showed a large variation. It is necessary to increase the precision of the experiment to obtain reliable sgRNA efficiency data from transient expression. METHODS AND RESULTS: The cotyledon of 11th, 15th, 19th, and 23rd-day-old tomato (Solanum lycopersicum cv. Micro-Tom) were used for expressing CRISPR-Cas9 transiently. The agrobacterium harboring sgRNA for targeting ALS2 gene of tomato was injected through the stomata of leaf adaxial side and the genomic DNA was extracted in 5 days after injection. The target gene edition was identified by amplifying DNA fragment of target region and analyzing with Illumina sequencing method. The target gene editing efficiency was calculated by counting base deletion and insertion events from total target sequence read. CONCLUSION: The CRISPR-Cas9 editing efficiency varied with tomato cotyledon age. The highest efficiency was observed at the 19-day-old cotyledons. Both the median and mean were the highest at this stage and the sample variability was also minimized. We found that the transgene of CRISPR-Cas9 system was strongly correlated with plant leaf development and suggested the optimum cotyledon leaf age for Agrobacterium-mediated transfection in tomato.

키워드

과제정보

This work was supported by the Cooperative Research Program for Agriculture Science and Technology Development (Project No. PJ01477601) funded by Rural Development Administration.

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