作物学报 ›› 2016, Vol. 42 ›› Issue (11): 1647-1655.doi: 10.3724/SP.J.1006.2016.01647
杨向东,牛陆,张伟,杨静,杜茜,邢国杰,郭东全,李启云,董英山*
YANG Xiang-Dong,NIU Lu,ZHANG Wei,YANG Jing,DU Qian,XING Guo-Jie,GUO Dong-Quan,LI Qi-Yun,DONG Ying-Shan
摘要:
大豆花叶病毒(soybean mosaic virus, SMV)病是我国各大豆主产区最重要的病害之一,严重影响大豆产量和籽粒外观品质。培育抗病品种是防治该病最经济有效的措施。本研究基于植物介导RNA干扰(RNA interference, RNAi)技术,将编码参与SMV运动和影响宿主域范围的P3蛋白基因RNAi片段导入栽培大豆品种,研究RNAi介导SMV-P3基因沉默对大豆抗SMV的影响。Southern杂交检测结果表明,外源RNAi片段以低拷贝的形式(1~4个)整合至大豆基因组中。对T1~T3代转基因大豆喷施除草剂和PCR鉴定结果表明,外源T-DNA插入片段在转基因大豆不同代际间能够稳定遗传。对T2和T3代转基因大豆接种SMV鉴定结果表明,转基因大豆对我国大豆产区主要流行SMV株系SC-3较非转基因对照受体品种Williams 82和SN9的抗性水平显著提高,病情指数降低至4.37%~18.51%,且抗性能够稳定遗传。综上所述,RNAi介导SM-P3基因沉默能够显著提高转基因大豆对SMV的抗性水平。
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