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Improvement of bacterial blight and brown planthopper resistance in an elite restorer line Huazhan of Oryza

文献类型： 外文期刊

作者： Xiao, Youlun 2 ; Li, Jinjiang 2 ; Yu, Jianghui 2 ; Meng, Qiucheng 2 ; Deng, Xiangyang 2 ; Yi, Zili 1 ; Xiao, Guoying 2 ;

作者机构： 1.Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China

2.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China

3.Hunan Acad Agr Sci, Hunan Plant Protect Inst, Changsha 410125, Hunan, Peoples R China

关键词： Hybrid rice;Restorer line;Bacterial blight resistance;Brown planthopper resistance;Gene pyramiding

期刊名称：FIELD CROPS RESEARCH （ 影响因子：5.224； 五年影响因子：6.19 ）

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收录情况： SCI

摘要： Development of resistant varieties is one of the most economical and effective strategies to prevent rice from bacterial blight disease (BB) and brown planthopper (BPH), the two main pests jeopardizing rice production. The hybrid rice Tianyouhuazhan (TianfengA/Huazhan) has been widely used in rice production in China, but this hybrid is susceptible to BB and BPH. In this study, one BB resistance gene (Xa23) and two BPH resistance genes (Bph14 and Bph15) were simultaneously introgressed into the restorer line Huazhan to improve the BB and BPH resistance of Tianyouhuazhan using marker -assisted backcrossing (MABC) strategy coupled with phenotypic selection. The results of identification of BB and BPH resistance revealed that almost all of the improved restorer lines and their derived hybrids showed high resistance (HR) or resistance (R) to BB and BPH. Almost all of the agronomic traits of improved restorer lines and their hybrids were similar to those of their respective original versions in field trial, except the 1000 -grain weight of improved hybrids showed an extremely significant increase than that of Tianyouhuazhan. Plot yields test in 2013 and 2014 suggested that two improved hybrid combinations named as TianfengA/R43-06 and TianfengA/R43-07 had higher grain yields per plot than Tianyouhuazhan and other improved hybrids. These results clearly indicate that pyramiding of Xa23, Bph14 and Bph15 genes is a useful approach for improving BB and BPH resistance, two hybrid combinations TianfengA/R43-06 and TianfengA/R43-07 could replace Tianyouhuazhan for extension in BB and/or BPH epidemic area in China. (C) 2015 Elsevier B.V. All rights reserved.

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