关键词:水稻恢复系; 稻瘟病; 白叶枯病; 褐飞虱; 抗性改良; 标记辅助选择 Evaluation of Improvement Effect of Restorer Lines on Pyramiding Genes Resistant to Rice Blast, Bacterial Leaf Blight and Brown Planthopper LOU Jue1, YANG Wen-Qing1, LI Zhong-Xing2, LUO Tian-Kuan1, XIE Yong-Chu1, ZHENG Guo-Chu1, YUE Gao-Hong1, XU Jian-Long3, LU Hua-Jin1,* 1Southern Zhejiang Key Laboratory of Crop Breeding, Wenzhou Academy of Agricultural Sciences, Wenzhou 325006, China
2Wenzhou Plant Protection Station, Wenzhou 325000, China
3 Institute of Crop Science / National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Fund:This study was supported by Special Projects of the Zhejiang Agricultural Key Research (8812 Plan, 2012C12901-17) and Wenzhou Seeds and Seedlings Technology Innovation (N20120019), Project of the Zhejiang Education Science and Planning (2015SCG183) and General Research Program for the Education Department of Zhejiang Province (Y201533916) AbstractThe novel blast resistance genes, Pi-GD-1(t) and Pi-GD-2(t)(abbreviated as G1 and G2, respectively) from rice cultivar Sanhuangzhan2, bacterial blight resistance gene Xa23 (abbreviated as X) from CBB23 and brown planthopper resistance gene Bph18(t)(abbreviated as B) from IR65482-7-216-1-2-B (abbreviated as IR65482) were introgressed into three rice restorer lines, Wenhui 845, Wenhui 117 and Wenhui 143, by marker-assisted backcross and pyramiding breeding methods integrated with artificial inoculation, natural induction and phenotypic selections. The eight resistant restorer lines pyramiding blast and brown planthopper resistance genes, i.e. Wenhui 845-G1-G2-B-4, Wenhui 845-G1-G2-B-5, Wenhui 117-G1-G2-X-B-3, Wenhui 143-G1-G2-B-3, Wenhui 143-G2-X-B-9, Wenhui 143-G2-X-B-10, Wenhui 143-G1-G2-B-11, and Wenhui 143-G1-G2-B-37, and their tester lines crossed with the sterile line Wufeng A demonstrated the similar or slight lower level of resistance against rice blast and brown planthopper as compared with the resistant donor parents Sanhuangzhan 2 or IR65482. Part of developed restorer lines (Wenhui 117-G1-G2-X-B-3, Wenhui 143-G2-X-B-9, and Wenhui 143-G2-X-B-10) and their tester lines showed resistance or moderate resistance to bacterial blight. The newly developed restorers resistant to blast, bacterial blight and brown planthopper were similar or superior to their respective original types in agronomic traits under normal condition, implying these resistant restorer lines can be useful in hybrid rice breeding and production. The results indicated that Xa23 could completely express its dominant resistance against different restorer genetic backgrounds whereas effects of resistance improvement in Pi-GD-1(t), Pi-GD-2(t), and Bph18(t) depend on their genetic background.
Keyword:Rice restorer lines; Blast; Bacterial blight; Brown planthopper; Resistance improvement; Marker-assisted selection Show Figures Show Figures
表1 稻瘟病、白叶枯病和褐飞虱抗性基因紧密连锁的分子标记信息 Table 1 Information of molecular markers associated with resistance genes for rice blast, bacterial leaf blight, and brown planthopper
表1 稻瘟病、白叶枯病和褐飞虱抗性基因紧密连锁的分子标记信息 Table 1 Information of molecular markers associated with resistance genes for rice blast, bacterial leaf blight, and brown planthopper
图2 与抗瘟基因Pi-GD-1(t)紧密连锁的RM6208标记在温恢845× 三黄占2号BC4F1群体中PCR扩增结果 M: DL2000 DNA marker; 1~39: BC4F1单株; 40: 三黄占2号。Fig. 2 PCR amplification of the marker RM6208 linked to the blast resistance gene Pi-GD-1(t) in the BC4F1 population derived from Wenhui 845× Sanhuangzhan 2 M: DL2000 DNA marker; 1-39: BC4F1 individual; 40: Sanhuangzhan 2.
表3 改良恢复系及其测交种孕穗期对白叶枯病菌C5菌系的抗性评价 Table 3 Evaluation of resistance of the improved restorer lines and their tester lines to the virulent Chinese strain C5 of Xanthomonas oryzae pv. oryzae at the booting stage
HR: high resistance; R: resistance; MR: medium resistance; MS: medium susceptibility; S: susceptibility; HS: high susceptibility. HR: 高抗; R: 抗病; MR: 中抗; MS: 中感; S: 感病; HS: 高感。
表3 改良恢复系及其测交种孕穗期对白叶枯病菌C5菌系的抗性评价 Table 3 Evaluation of resistance of the improved restorer lines and their tester lines to the virulent Chinese strain C5 of Xanthomonas oryzae pv. oryzae at the booting stage
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