中国水稻科学 ›› 2023, Vol. 37 ›› Issue (2): 213-224.DOI: 10.16819/j.1001-7216.2023.220305

• 实验技术 • 上一篇    

农杆菌介导的籼稻9311和华占遗传转化体系的研究

张佳1,2, 王慧杰2, 何正权1,*(), 刘文真2,*()   

  1. 1三峡大学 三峡植物遗传与种质创新重点实验室,宜昌 443002
    2中国水稻研究所 水稻生物学国家重点实验室,杭州 310006
  • 收稿日期:2022-03-03 修回日期:2022-05-14 出版日期:2023-03-10 发布日期:2023-03-10
  • 通讯作者: 何正权,刘文真
  • 基金资助:
    国家转基因生物新品种培育重大专项(2016ZX08010004)

Analysis of Agrobacterium-Mediated Genetic Transformation System of indica Rice 9311 and Huazhan

ZHANG Jia1,2, WANG Huijie2, HE Zhengquan1,*(), LIU Wenzhen2,*()   

  1. 1Key Laboratory of Three Gorges Regional Plant Genetics and Germplasm Enhancement, China Three Gorges University, Yichang 443002, China
    2State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
  • Received:2022-03-03 Revised:2022-05-14 Online:2023-03-10 Published:2023-03-10
  • Contact: HE Zhengquan, LIU Wenzhen

摘要:

【目的】水稻转基因技术是推动水稻分子生物学研究和精准育种的重要工具。农杆菌介导法是水稻遗传转化的主流方法。然而受基因型限制,典型籼稻的转化效率仍然偏低,需提高其转化效率。【方法】以顽拗型籼稻品种9311和华占为受体材料,研究了不同大量元素、微量元素、有机物和碳源的组合,植物激素浓度,侵染培养基,乙酰丁香酮(AS)浓度和光周期对遗传转化效率的影响。【结果】在成熟种子组织培养试验中,MS大量元素、B5微量元素、N6有机物和麦芽糖为9311最优组合,华占最优组合为MS大量元素、MS微量元素、MS有机物和麦芽糖。诱导培养基中添加0.5 mg/L的BAP或1.5 mg/L的KT可显著提高9311和华占的组织培养再生率,可达70.0%以上。在侵染过程中,添加100 μmol/L AS的转化效率高于200 μmol/L AS。光周期实验显示9311和华占宜采用不同的光周期策略,9311在全黑暗条件下进行愈伤诱导和筛选,在全光照条件下进行分化,转化效率最高,达6.0%~6.4%,而华占在12 h光照/12 h黑暗条件下进行诱导、筛选和分化,获得的转化效率最高(5.0%~7.5%)。【结论】本研究优化了顽拗型籼稻9311和华占的组织培养和遗传转化体系,该体系也可以应用于其他相关籼稻基因型的遗传转化。

关键词: 顽拗型籼稻, 根癌农杆菌, 组织培养, 遗传转化

Abstract:

【Objective】 The rice transgenic technology is an important tool to promote rice molecular biology research and precision breeding. Agrobacterium-mediated transgenic technology has become the mainstream method for rice genetic transformation. Nevertheless, due to its genotype, the genetic transformation efficiency of typical indica rice is still quite low. It is urgent to improve its transformation efficiency. 【Method】 The effects of medium composition and photoperiod on genetic transformation efficiency of recalcitrated indica rice varieties 9311 and Huazhan were investigated. 【Result】 The results showed that MS macro element, B5 micro element, N6 organic matter and maltose were the best combination for 9311 tissue culture. MS macro element, MS micro element, MS organic matter and maltose were the best combination for Huazhan tissue culture. Adding 0.5 mg/L BAP or 1.5 mg/L KT into the induction medium could significantly improve the regeneration rate of 9311 and Huazhan tissue culture, up to more than 70.0%. The transformation efficiency with 100 μmol/L AS in the infection solution was higher than that with 200 μmol/L AS. Photoperiod experiments suggested that different photoperiod strategies should be adopted for 9311 and Huazhan transformation. 9311 transformation efficiency peaked, 6.0%?6.4%, under continuous darkness at the induction and selection stages and continuous light at the differentiation stage. Huazhan transformation efficiency reached the highest, 5.0%?7.5%, under 12 h photoperiod at all stages. 【Conclusion】 Collectively, the present study optimized tissue culture and genetic transformation system of recalcitrant indica rice varieties 9311 and Huazhan. Our methods could also be applied to the genetic transformation of other related indica rice genotypes.

Key words: recalcitrated indica rice, Agrobacterium tumefaciens, tissue culture, genetic transformation