一个加速的无转基因基因组编辑系统,使用微粒轰炸米不成熟胚胎
Yan Zhang1, Ming Cheng2, Karen Massel3
1School of Agriculture and Food Sustainability, The University of Queensland, St Lucia, 4072 Australia.
aBIOTECH
|July 11, 2025
概括
研究人员开发了一种快速的方法,在一代人内创建无转基因的基因组编辑的植物. 这种方法避免了外来DNA的整合,解决了CRISPR/Cas9基因编辑在作物中的商业化问题.
科学领域:
- 植物生物技术 植物生物技术
- 基因组学就是基因组学.
- 分子生物学分子生物学
背景情况:
- 植物中的CRISPR/Cas9基因组编辑通常涉及整合外来DNA (Cas9核酶和导向RNA),这引发了对商业应用的遗传和监管方面的担忧.
- 植物基因组中转基因DNA的存在可能导致意外的遗传修饰和监管障碍.
研究的目的:
- 开发一种加速的管道,用于在T0世代中产生无转基因基因组编辑的 (Sorghum bicolor) 植物.
- 克服与外来DNA集成在CRISPR/Cas9中介植物基因组编辑相关的挑战.
主要方法:
- 通过微射弹轰炸,与玉米优化的Cas9和指导RNA (gRNA) 磁带共同转化米未成熟胚胎.
- 具有或没有抗生素选择的转化组织的并行培养 (基因/G418).
- 针对植物脱酶 (PDS) 基因,通过白化表型对突变进行视觉评估.
主要成果:
- 与抗生素选择组相比,非选择组实现了更高的白化率 (11.1-14.3%) 和无转基因的基因组编辑植物 (22.2-38.1%) (4.2-8.3%的白化,0-5.9%的无转基因).
- 该策略在T0代成功生产了无转基因的基因组编辑,而不需要自我交叉或外交叉.
- 证明了具有可取特征的编辑植物的高效生成,同时消除了外来DNA.
结论:
- 开发的管道提供了一种有效的方法,可以在一代人内生产无转基因的基因组编辑.
- 这种方法通过解决与外来DNA相关的监管问题,促进了基因组编辑作物的商业化.
- 这些发现适用于其他作物,特别是植物繁殖物种,如,甘和香.
相关概念视频
01:16In-vitro Mutagenesis
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
01:59CRISPR
Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...
01:28CRISPR/Cas9 Genome Editing
The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...