| 节水抗旱稻恢复系的抗褐飞虱分子标记辅助选育及抗性评价 |
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| 基金项目： | This study was supported by the Shanghai Seed Industry Development Project(2019-02-08-00-08-F01110);the Shanghai Agriculture Applied Technology Development Program(2018-02-08-00-08-F01553);the National Key Research and Development Program of China(2017YFD0100304) |
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| 摘 要： | 褐飞虱是水稻的主要害虫之一,利用水稻抗褐飞虱基因培育抗虫品种是目前公认最经济有效、环境友好的策略。本研究利用水稻功能基因组已克隆的抗褐飞虱基因,通过分子标记辅助选择和常规回交育种相结合的方法,将抗褐飞虱基因Bph6、Bph9、Bph14和Bph15单独和聚合导入到节水抗旱稻恢复系旱恢3号,获得了一系列含有单基因、双基因、三基因和四基因的改良系。采用标准苗期集团筛选法进行褐飞虱抗性鉴定,评价这些基因在旱恢3号背景下的效应及相互作用。表明单基因改良系中, Bph9的抗性最强,且Bph9 Bph6 Bph15 Bph14;在聚合改良系中,抗性均优于单基因改良系,四基因聚合改良系的抗性最强,不同基因型组合的抗性效应是Bph6+Bph9+Bph14+Bph15Bph6+Bph9 Bph6+Bph9+Bph14 Bph6+Bph9+Bph15 Bph6+Bph14+Bph15 Bph9+Bph14+Bph15 Bph14+Bph15。在自然条件下,改良系与旱恢3号在株高、有效穗和千粒重等农艺性状上差异不显著,其他性状与旱恢3号相仿或略差。本试验表明单独和聚合导入Bph6、Bph9、Bph14和Bph15基因能显著提高节水抗旱稻恢复系的褐飞虱抗性,这4个基因的加性效应明显,可为今后节水抗旱稻抗褐飞虱育种提供理论依据和材料基础。
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| 收稿时间： | 2018-12-20 |
Pyramiding and evaluation of brown planthopper resistance genes in water-saving and drought-resistance restorer line |
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| Authors: | ZHANG An-Ning LIU Yi WANG Fei-Ming XIE Yue-Wen KONG De-Yan NIE Yuan-Yuan ZHANG Fen-Yun BI Jun-Guo YU Xin-Qiao LIU Guo-Lan LUO Li-Jun |
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| Institution: | 1.Shanghai Agrobiological Gene Center, Shanghai 201106, China;2.College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China;3.Jiangxi Super Rice Research and Development Center, Nanchang 330200, Jiangxi, China |
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| Abstract: | The brown planthopper (Nilaparvata lugens St?l, BPH) is the most serious pest threat to rice production across Asia. Increasing host-plant resistance is the most economical and ecological strategy for controlling this pest. The objective of this study was to survey the resistance effects of different R genes to brown planthopper, reveal its influence on agronomic traits, and provide insights into molecular breeding of rice with resistance to brown planthopper. In this research, the brown planthopper R genes Bph6, Bph9, Bph14, and Bph15 were introgressed into the water-saving and drought-resistant rice restorer line ‘Hanhui 3’ through marker-assisted backcrossing scheme. The standard seedling group screening method was used to identify the resistance of the improved lines. Among single-gene improved lines, the order of the R genes effects was Bph9 > Bph6 > Bph15 > Bph14, and among pyramiding improved lines, that was Bph6+Bph9+Bph14+Bph15 > Bph6+Bph9 > Bph6+Bph9+Bph14 > Bph6+Bph9+Bph15 > Bph6+Bph14+Bph15 > Bph9+Bph14+Bph15 > Bph14+Bph15. Furthermore, the survey of agronomic traits demonstrated that there were no significant differences between the 11 improved lines and recurrent parent ‘Hanhui 3’ in plant height, panicle number per plant and 1000-grain weight. These results suggest that the introgression of Bph6, Bph9, Bph14, and Bph15 genes by molecular marker-assisted selection technology could enhance the resistance to brown planthopper and improve breeding efficiency. |
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| Keywords: | breeding brown planthopper resistance gene marker-assisted selection resistance evaluation water-saving and drought-resistance rice |
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