突破复杂性状多基因转化技术壁垒,首创胚乳花青素高积累的水稻新种质

摘要

随着转基因技术的日趋成熟,利用生物工程手段加快改良作物农艺性状,已经越来越显示出其巨大的应用潜力.在改良多基因调控的复杂农艺性状方面,单基因转化收效甚微,而长期以来多基因转化不仅受限于技术因素,而且在协调表达调控、代谢及修饰等一系列相关基因方面更是难于突破.近期,我国科学家首次利用自创的多基因垛叠表达系统,成功在水稻(Oryza sativa)胚乳中合成了具有抗氧化活性的花青素,在复杂性状多基因转化领域取得了突破性进展.%With improved transgenic technology,there is great potential for bio-fortification of crops.For complex agronomic traits controlled by multiple genes,single gene transformation is insufficient,and multi-gene engineering is limited to technical factors.Regulation and expression of metabolic modification and a series of related genes is more difficult to break through.Recently,Chinese scientists successfully engineered sophisticated anthocyanin biosynthesis in rice endosperm,which suggests the potential utility of the TransGene Stacking Ⅱ System for synthetic biology and improving agronomic traits in crops.