ACTA AGRICULTURAE BOREALI-SINICA ›› 2021, Vol. 36 ›› Issue (1): 71-80. doi: 10.7668/hbnxb.20190798

Special Issue: Rice Saline-alkali stress Biotechnology

• Crop Genetics & Breeding·Germplasm Resources·Biotechnology • Previous Articles     Next Articles

Enhancing Salt Tolerance of Rice by Knocking out OsEIL1 and OsEIL2 Via CRISPR/Cas9 System

MO Tianyu, XU Shanbin, ZOU Detang, WANG Jingguo, LIU Hualong, SUN Jian, JIA Yan, ZHAO Hongwei, ZHENG Hongliang   

  1. Key Laboratory of Germplasm Enhancement, Physiology and Ecology of Food Crops in Cold Region, Ministry of Education, Northeast Agricultural University, Harbin 150030, China
  • Received:2020-09-18 Published:2021-02-28

Abstract: In order to breeding salt tolerant rice varieties, a target was designed to simultaneously knockout OsEIL1 and OsEIL2 genes in rice variety Dongnong 427 by using CRISPR/Cas9 technology. Five mutant plants were obtained in T0 via PCR and sequencing method, one of them was double genes mutant plant. In the T1 mutant lines of this plant, four double gene homozygous mutant plants without T-DNA element were obtained. Salt tolerance experiment in seedling stage and agronomic trait analysis at maturity were carried out in T2. The results indicated that after 200 mmol/L NaCl solution treatment for 5 days, the fresh weight and the dry weight of mutant plants were significantly higher than wild type plants, the Na+ content in shoot and root were significantly lower than wild type plants, however, the K+ content was no difference with wild type plants. After recovered for 7 days, the seedling survival rate of mutant plants(75.0%) was significantly higher than wild type plants(8.3%). The main agronomic traits didn't change significantly at maturity. In summary, this study improved the salt tolerance of rice variety Dongnong 427 by using CRISPR/Cas9 technology, and provided a theoretical and material basis for the cultivation of salt tolerant rice variety.

Key words: Rice, Salt tolerance, OsEIL1, OsEIL2, CRISPR/Cas9

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Cite this article

MO Tianyu, XU Shanbin, ZOU Detang, WANG Jingguo, LIU Hualong, SUN Jian, JIA Yan, ZHAO Hongwei, ZHENG Hongliang. Enhancing Salt Tolerance of Rice by Knocking out OsEIL1 and OsEIL2 Via CRISPR/Cas9 System[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(1): 71-80. doi: 10.7668/hbnxb.20190798.

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