Breeding of transgenic rice restorer line for multiple resistance against bacterial blight, striped stem borer and herbicide

文献类型： 外文期刊

第一作者： Yao, Fangyin

作者： Yao, Fangyin;Wei, Yipei;Zhu, Changxiang;Song, Yunzhi;Wen, Fujiang;Jiang, Mingsong;Li, Guangxian

作者机构：

关键词： bacterial blight disease resistance; herbicide resistance; hybrid rice; insect resistance; transgene pyramiding; transgenic japonica restorer line

期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）

ISSN： 0014-2336

年卷期： 2008 年 163 卷 2 期

页码：

收录情况： SCI

摘要： In this paper, we described the breeding of transgenic rice restorer line for multiple resistance against bacterial blight, striped stem borer (SSB) and herbicide by conventional crossing of two transgenic parental lines transformed independently with different genes. Two stable transgenic rice lines used as donor parents were developed, one was Zhongguo91 which contained cry1Ab gene (for insect resistance) and bar gene (for tolerance of herbicide), and the other was Yujing6 which contained Xa21 gene (resistance to bacterial blight). The elite restorer line Hui773 was used as recipient and crossed with the two stable transgenic rice lines. Then five successive backcrosses were made using Hui773 as recurrent parent. Two rice elite restorers, T773-1 expressing cry1Ab and bar genes and T773-2 expressing Xa21 gene, were obtained, which were confirmed by PCR analysis and testing selectable marker genes in the hybrid progenies. The cross was made between T773-1 and T773-2 to select stable restorer line carrying Xa21, cry1Ab and bar genes. Finally, we obtained transgenic restorer line T773 with good agronomic traits and obvious multiple resistance to Xanthomonas oryzae pv. oryzae, striped stem borer (Chilo suppressalis) and herbicide. The hybrid F(1) generation produced from the cross between transgenic restorer line T773 and a corresponding male sterile line Zaohua2A maintained obvious resistance to rice bacterial blight, rice leaffolder and striped stem borer, and showed significant heterosis. Our results indicate that it is feasible to develop transgenic hybrid rice cultivar through breeding transgenic restorer lines.

分类号： S3

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