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尽量减少与编码Bt毒素的基因结构相关的IP问题 - 一个案例研究
Md Mahmudul Hassan1,2, Francis Tenazas1, Adam Williams1
1School of Biosciences, University of Melbourne, Parkville, VIC, 3010, Australia.
BMC biotechnology
|June 2, 2024
概括
修改后的Bacillus thuringiensis (Bt) Cry1B和Cry1C基因在布拉西卡植物中表达高,导致钻石背幼虫的100%死亡率. 这些耐昆虫的转基因作物可以在降低许可费用的情况下开发.
科学领域:
- 农业科学 农业科学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 开发基因工程布拉西卡 (大白菜,花菜,大菜) 表达Bacillus thuringiensis (Bt) 杀虫毒素.
- 修改的Cry1B和Cry1C基因 (Cry1BM,Cry1CM) 旨在最大限度地降低许可成本并优化植物活动.
- 这是一项针对印度和澳大利亚农民的公共资助计划.
研究的目的:
- 评估Cry1BM和Cry1CM基因在布拉西卡菌中的杀虫功效.
- 评估由单 (S4/S7) 或双 (S4S4/S7S7) 地下三叶草特技病毒 (SCSV) 传播者驱动的表达水平.
- 确定适合开发具有成本效益,耐昆虫的转基因作物.
主要方法:
- 构建了被改进的Cry1BM/Cry1CM基因,这些基因被引入了Arabidopsis thaliana.
- 由单个或双个SCSV促进器驱动的表达.
- 使用钻石背 (Plutella xylostella) 幼虫进行杀虫生物测试.
主要成果:
- 在转基因Arabidopsis中观察到高水平的Cry1BM/Cry1CM表达,Cry1CM蛋白质积累范围从5.18到176.88μg/g干重.
- 单个/双个SCSV促销者与基因表达水平之间没有发现相关性.
- 100%的死亡率的第一阶段钻石背幼虫食转基因叶子;最小的叶子损伤 (0.125对4.2).
结论:
- 修改后的Cry1基因适合开发抗昆虫的转基因作物.
- 构建组件似乎可以在没有进一步许可的情况下使用 (除了美国的PAT),大大降低了开发成本.
- 未来转基因作物植物中具有成本效益的昆虫耐药性的潜力.
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