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Production of Conjoined Transgenic and Edited Barley and Wheat Plants for Nud Genes Using the CRISPR/SpCas9 System

文献类型： 外文期刊

作者： Zang, Yiming 1 ; Gong, Qiang 2 ; Xu, Yanhao 3 ; Liu, Huiyun 2 ; Bai, Hao 2 ; Li, Na 2 ; Du, Lipu 2 ; Ye, Xingguo 2 ; Lan, Caixia 1 ; Wang, Ke 2 ;

作者机构： 1.Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan, Peoples R China

2.Chinese Acad Agr Sci, Inst Crop Sci, Beijing, Peoples R China

3.Hubei Acad Agr Sci, Food Crops Inst, Hubei Key Lab Food Crop Germplasm & Genet Improvem, Wuhan, Peoples R China

关键词： nudum (nud) gene; genome editing; agrobacterium-mediated transformation; conjoined plants; naked grain

期刊名称：FRONTIERS IN GENETICS （ 影响因子：4.772； 五年影响因子：4.933 ）

ISSN：

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： The Nudum (Nud) gene controls the caryopsis type of cereal crops by regulating lipid biosynthetic pathways. Based on the HvNud sequence and its homologous gene sequences in wheat, a conserved sgRNA was designed to obtain the mutants from the barley variety "Vlamingh" and the wheat variety "Fielder" via Agrobacterium-mediated transformation. A total of 19 and 118 transgenic plants were obtained, and 11 and 61 mutant plants were identified in T-0 transgenic plants in barley and wheat after PCR-RE detection, and the editing efficiencies of the targeted gene were 57.9 and 51.7% in barley and wheat, respectively. The grain shape of the barley mutants was naked. Five different combinations of mutations for wheat TaNud genes were identified in the T-0 generation, and their homozygous-edited plants were obtained in the T-1 generation. Interestingly, the conjoined plants in which one plant has different genotypes were first identified. The different tillers in an individual T-0 plant showed independent transgenic or mutant events in both barley and wheat, and the different genotypes can stably inherit into T-1 generation, indicating that the T-0 transgenic plants were the conjoined type. In addition, we did not find any off-target mutations in both barley and wheat. A candidate method for detecting putative-edited wheat plants was suggested to avoid losing mutations in this investigation. This study provides not only materials for studying the function of the Nud gene in barley and wheat but also a system for detecting the mutants in wheat.

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