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Pyramiding of nine transgenes in maize generates high-level resistance against necrotrophic maize pathogens

文献类型： 外文期刊

作者： Zhu, Xiang 1 ; Zhao, Jinfeng 3 ; Abbas, Hafiz Muhammad Khalid 1 ; Liu, Yunjun 4 ; Cheng, Menglan 1 ; Huang, Jue 1 ; Ch 1 ;

作者机构： 1.Huazhong Agr Univ, Dept Plant Pathol, Coll Plant Sci & Technol, Wuhan 430070, Hubei, Peoples R China

2.Huazhong Agr Univ, Key Lab Crop Dis Monitoring & Safety Control Hube, Wuhan 430070, Hubei, Peoples R China

3.Shanxi Acad Agr Sci, Millet Res Inst, Changzhi 046011, Shanxi, Peoples R China

4.Chinese Acad Agr Sci, Inst Crop Sci, South St Zhongguancun 12, Beijing 100081, Peoples R China

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 2018 年 131 卷 10 期

页码：

收录情况： SCI

摘要： Key message Nine transgenes from different categories, viz. plant defense response genes and anti-apoptosis genes, played combined roles in maize to inhibit the necrotrophic pathogens Rhizoctonia solani and Bipolaris maydis. Maize sheath blight and southern corn leaf blight are major global threats to maize production. The management of these necrotrophic pathogens has encountered limited success due to the characteristics of their lifestyle. Here, we presented a transgenic pyramiding breeding strategy to achieve nine different resistance genes integrated in one transgenic maize line to combat different aspects of necrotrophic pathogens. These nine genes, selected from two different categories, plant defense response genes (Chi, Glu, Ace-AMP1, Tlp, Rs-AFP2, ZmPROPEP1 and Pti4), and anti-apoptosis genes (Iap and p35), were successfully transferred into maize and further implicated in resistance against the necrotrophic pathogens Rhizoctonia solani and Bipolaris maydis. Furthermore, the transgenic maize line 910, with high expression levels of the nine integrated genes, was selected from 49 lines. Under greenhouse and field trial conditions, line 910 showed significant resistance against maize sheath blight and southern corn leaf blight diseases. Higher-level resistance was obtained after the pyramiding of more resistance transgenes from different categories that function via different mechanisms. The present study provides a successful strategy for the management of necrotrophic pathogens.

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