华北农学报 ›› 2020, Vol. 35 ›› Issue (6): 58-66. doi: 10.7668/hbnxb.20191109

所属专题: 水稻 生物技术

• 作物遗传育种·种质资源·生物技术 • 上一篇    下一篇

利用CRISPR/Cas9技术编辑DTH8基因改良水稻99-25的抽穗期

张浩1,2, 柳絮2, 宣宁2, 张华2, 高瑞钰1,2, 赵倩倩1,2, 姚方印2   

  1. 1. 山东师范大学, 山东 济南 250014;
    2. 山东省农业科学院 生物技术研究中心, 山东 济南 250100
  • 收稿日期:2020-07-11 出版日期:2020-12-28
  • 通讯作者: 姚方印(1966-),男,山东成武人,研究员,博士,硕士生导师,主要从事水稻遗传育种研究。
  • 作者简介:张浩(1995-),男,山东费县人,在读硕士,主要从事水稻遗传育种研究。
  • 基金资助:
    国家转基因重大专项(2016ZX08001001-001-007);山东省农业良种工程(2017LZ029;2019LZGC017;2019LZGC003);山东省农业科学院创新工程(CXGC2016A02);山东省自然科学基金(ZR2019BC105);山东省现代农业产业技术体系(水稻)项目(SDAIT-17-03)

Editing DTH8 Gene Using CRISPR/Cas9 Technology to Improve Heading Date of Rice 99-25

ZHANG Hao1,2, LIU Xu2, XUAN Ning2, ZHANG Hua2, GAO Ruiyu1,2, ZHAO Qianqian1,2, YAO Fangyin2   

  1. 1. Shandong Normal University, Jinan 250014, China;
    2. Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Jinan 250100, China
  • Received:2020-07-11 Published:2020-12-28

摘要: CRISPR/Cas9基因编辑技术已经成为水稻育种的重要手段。为培育早熟、丰产、优质的种质资源,以农艺性状优良、迟熟粳稻品种香糯99-25为试验材料,构建了CRISPR/Cas9双靶点表达载体对抽穗期基因DTH8进行编辑,采用农杆菌介导法将构建好的表达载体转化农杆菌EHA105。用携带重组质粒的农杆菌菌液侵染水稻愈伤组织,成功获得了30株T0转基因苗。对T0植株利用潮霉素特异引物进行分子检测,其中阳性植株29株,阳性率高达96.7%。设计特异性引物对29株阳性苗的靶位点上下游600 bp进行PCR扩增测序,结果表明,7株转基因阳性苗在第2个靶点附近发生了碱基替换或插入突变。对这7株突变株系的抽穗期进行调查,发现DTH8-2、DTH8-5、DTH8-9、DTH8-10、DTH8-17、DTH8-21的抽穗期提前。利用实时荧光定量PCR检测发现DTH8-2、DTH8-9、DTH8-17与香糯99-25相比DTH8基因表达显著降低。成功利用CRISPR/Cas9基因编辑技术对香糯99-25的DTH8基因进行了编辑,获得了抽穗期提前的DTH8突变体材料,为培育早熟、丰产、优质的水稻品种提供了种质资源。

关键词: 水稻, 抽穗期, 基因编辑, DTH8, CRSPR/Cas9

Abstract: CRISPR/Cas9 gene editing technology has become an important means for rice breeding. For cuttivating early maturity, high yield and high quality germplasm resources,Xiangnuo 99-25 which is a late-maturing japonica rice with excellent agronomic traits was used as the test material. The CRISPR/Cas9 dual-target expression vector was constructed to edit the heading gene DTH8 and transformed into Agrobacterium EHA105. EHA105 was transformed into rice callus via Agrobacterium-mediated transformation method, and 30 T0 transgenic seedlings were obtained. All the T0 seedlings were detected by PCR using hygromycin specific primer. Among them, 29 strains were detected as positive plants and the positive rate was 96.7%. Specific primers were designed to amplify 600 bp upstream/downstream of the target site in the 29 positive seedlings. Sequence results showed that 7 seedlings had mutations, such as base substitution and insertion around the second target site. The heading date of DTH8-2,DTH8-5, DTH8-9,DTH8-10,DTH8-17,DTH8-21 in these 7 seedlings were detected early heading date compared with Xiangnuo 99-25. And DTH8 expression in DTH8-2, DTH8-9, DTH8-17 were down-regulated compared with Xiangnuo 99-25. CRISPR/Cas9 gene editing technology was successfully used to edit DTH8 gene in Xiangnuo 99-25. The DTH8 mutant rice with early heading stage was obtained, which provided germplasm resources for cultivating early maturing, high-yield and high-quality rice varieties.

Key words: Rice, Heading stage, Gene editing, DTH8, CRISPR/Cas9

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引用本文

张浩, 柳絮, 宣宁, 张华, 高瑞钰, 赵倩倩, 姚方印. 利用CRISPR/Cas9技术编辑DTH8基因改良水稻99-25的抽穗期[J]. 华北农学报, 2020, 35(6): 58-66. doi: 10.7668/hbnxb.20191109.

ZHANG Hao, LIU Xu, XUAN Ning, ZHANG Hua, GAO Ruiyu, ZHAO Qianqian, YAO Fangyin. Editing DTH8 Gene Using CRISPR/Cas9 Technology to Improve Heading Date of Rice 99-25[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(6): 58-66. doi: 10.7668/hbnxb.20191109.

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