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通过种子进行合成克隆繁殖
Mohan P A Marimuthu1, Sylvie Jolivet, Maruthachalam Ravi
1Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research (CSIR), Hyderabad, India.
概括
科学家通过创建克隆种子,在植物中实现了无性繁殖. 这一突破使杂交植物的无限繁殖成为可能,彻底改变了农业和作物开发.
科学领域:
- 植物遗传学和生殖生物学
- 农业生物技术 农业生物技术
- 农作物科学 农作物科学
背景情况:
- 主要粮食作物中的性繁殖限制了可取的杂交特征的无限传播.
- 无性繁殖通过apomixis,绕过 meiois和受精,在关键农业作物中没有自然存在.
- 开发阿波米克斯的方法对于彻底改变植物育种和种子生产至关重要.
研究的目的:
- 在一个模型植物 (Arabidopsis) 中设计 de novo apomixis.
- 为了证明从性植物中生产克隆种子的可行性.
- 为了使强壮的杂交品种能够无限期繁殖.
主要方法:
- 交叉的阿拉比多普西斯突变体 (MiMe和二) 生产双胞胎克隆性配体.
- 使用一种经过修改的植物菌株,其染色体经过工程改造,可在受精后被清除.
- 分析后代以识别和量化克隆种子.
主要成果:
- 成功生产了母植物的克隆种子,高达34%的后代是克隆的.
- 通过基因操纵,证明了克隆性配子通过基因操纵转化为可行的种子.
- 证实第一代克隆植物可以进一步克隆,建立一个可重复的过程.
结论:
- 通过操纵保存的基因,在典型的性植物中通过种子实现了克隆繁殖.
- 这种方法为无限期传播精英杂交品种提供了一条途径,改变了农业.
- 操纵2 - 4个保存的基因提供了一个有针对性的方法,用于在作物中开发apomixis.
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