中文摘要：白叶枯病（BB）和褐飞虱（BPH）是危害水稻生产的两种主要病虫害，培育抗性品种是阻止水稻感染白叶枯病和遭受褐飞虱危害的最经济有效的策略之一。杂交水稻Tianyouhuazhan (TianfengA/Huazhan)已在中国水稻生产中广泛使用，但是这种杂交稻易受BB和BPH影响。本研究通过标记辅助回交法和表型选择将一个BB抗性基因（Xa23）和两个BPH抗性基因（Bph14和Bph15）同时导入到恢复系Huazhan中，以提高Tianyouhuazhan对BB和BPH的抗性。研究结果表明，聚合Xa23、Bph14和Bph15基因是提高水稻对BB和BPH抗性的有效途径，两个杂交组合TianfengA/R43-06和TianfengA/r43-07可以取代Tianyouhuazhan在中国BB和/或BPH流行地区广泛种植。
外文摘要：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.
外文关键词：Hybrid rice；Restorer line；Bacterial blight resistance；Brown planthopper resistance；Gene pyramiding
作者：Xiao, Youlun；Li, Jinjiang；Yu, Jianghui；等
作者单位：中国科学院
期刊名称：FIELD CROPS RESEARCH
期刊影响因子：2.927
出版年份：2016
出版刊次：2
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