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Agrobacterium tumefaciens-mediated transformation of embryogenic callus and CRISPR/Cas9-mediated genome editing in 'Feizixiao' litchi

文献类型： 外文期刊

作者： Wang, Shujun 1 ; Wang, Guo 1 ; Li, Huanling 1 ; Li, Fang 1 ; Wang, Jiabao 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Hainan, Peoples R China

2.Natl Key Lab Trop Crop Breeding, Haikou 571101, Hainan, Peoples R China

关键词： Litchi; Litchi chinensis Sonn.; Genetic transformation; Gene editing; Polyphenol oxidase (PPO)

期刊名称：HORTICULTURAL PLANT JOURNAL （ 影响因子：5.7； 五年影响因子：5.4 ）

ISSN： 2095-9885

年卷期： 2023 年 9 卷 5 期

页码：

收录情况： SCI

摘要： Litchi (Litchi chinensis Sonn.) is a type of commercially prevalent subtropical and tropical fruit. Since litchi has a highly heterozygous genetic background and a long reproductive cycle, conventional breeding methods (such as hybridization) have limited ability to nurture new litchi cultivars. Here, an efficient and stable Agrobacterium tumefaciens-mediated genetic transformation of embryogenic callus was established in 'Feizixiao' litchi. Transgenic materials were verified using polymerase chain reaction (PCR) analysis, b-glucuronidase (GUS) assay, and green fluorescent protein (GFP) assay. To implement the technology of the Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)/ associated protein 9 (CRISPR/Cas9) technology in 'Feizixiao' litchi and verify the validity of these transformation systems, the litchi polyphenol oxidase gene (LcPPO, JF926153) was knocked out. Various categories of mutations, covering base insertions, deletions, and substitutions, were found in transgenic materials via sequence analysis. The transformation system achieved high feasibility and efficiency, and the system of CRISPR/Cas9 was successfully employed to edit genes in 'Feizixiao' litchi. This work provides an essential foundation for investigating the functions of genes and accelerating litchi genetic improvement.

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