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Generation of a collection of MYB mutant lines via pooled CRISPR-Cas9 in grape |
Xuena Yu1, 2, Yang Hu1, 2, Jiasi Han1, 2, Liang Zhao1, 2, Zhuoshuai Jin1, 2, Xiangnan Xu3, Jiayue Feng1, 2, Yingqiang Wen1, 2#
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1 State Key Laboratory of Crop Stress Resistance and High Efficiency Production/College of Horticulture, Northwest A&F University, Yangling 712100, China
2 Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, China
3 Institute of Plant Nutrition, Resource and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
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Highlights
● A sgRNA library of CRISPR-Cas9 targeting grape MYB family was designed and synthesized.
● Several grape mutants were obtained via pooled Agrobacterium-mediated transformation.
● A novel grape mutant exhibited significantly enhanced tolerance to drought stress.
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摘要
葡萄(Vitis vinifera L.)是全球性重要经济果树,在栽培生产中极易遭受各种病虫害和干旱、高温等非生物逆境的威胁。究其原因,广泛用于栽培的欧亚种葡萄中抗性种质资源缺乏,而且传统杂交育种周期较长,严重影响葡萄抗逆育种进程。利用CRISPR-Cas9基因编辑技术能实现对全基因组范围类目标基因的高效突变(功能失活),从而加速抗性基因挖掘、功能鉴定与抗性种质创新。目前,全球范围内已有利用CRISPR-Cas9在一次转化过程中实现葡萄中1个基因编辑或2个基因同时编辑的研究报道,但能否利用该体系快速、批量创制葡萄基因功能失活突变体尚不清楚。该研究针对葡萄MYB转录因子家族的138个成员,在基因保守区域与特异区域分别设置靶位点,共设计了265个sgRNA。采用分组混合的方法构建到基因编辑载体上,将所有重组质粒混合后转化农杆菌,通过对混池文库高通量测序,发现文库sgRNA覆盖率达67.17%,基因覆盖率高达90.58%,可用于遗传转化。将农杆菌混池文库与’赤霞珠’葡萄原胚团共培养,最终获得了1354株再生植株,其中有341株为转基因阳性植株,67株为基因编辑植株,共有8个MYB转录因子发生突变。通过表型分析,发现GSVIVT01026481001突变体对干旱胁迫的抗性显著增强。本研究为利用基因编辑技术创制木本植物突变体库提供了参考。
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Received: 17 April 2024
Online: 31 December 2024
Accepted: 23 December 2024
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Fund: This work was supported by the National Natural Science Foundation of China (32272670, 31972986) and the Key Research and Development Program of Shaanxi (2023-YBNY-059). |
About author: Xuena Yu, E-mail: xuenayu@nwafu.edu.cn; #Correspondence Yingqiang Wen, Tel: +86-29-87082613, E-mail: wenyq@nwsuaf.edu.cn
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Cite this article:
Xuena Yu, Yang Hu, Jiasi Han, Liang Zhao, Zhuoshuai Jin, Xiangnan Xu, Jiayue Feng, Yingqiang Wen.
2025.
Generation of a collection of MYB mutant lines via pooled CRISPR-Cas9 in grape. Journal of Integrative Agriculture, 24(8): 3287-3290.
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