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期 刊 ：植物保护学报 2011年

关键词：水稻；条纹叶枯病；抗源筛选；品种改良；分子标记；

Keywords:Oryza sativa, Rice stripe virus, resistance resource, variety breeding, molecular marker,

摘 要 ：为了丰富水稻条纹叶枯病的抗性资源和加快条纹叶枯病抗性品种培育,对69份来自华东及华南地区的籼粳不同亚种材料,在浙江、江苏两地进行苗期人工接虫和大田自然诱发筛选条纹叶枯病抗性资源。11份材料表现出较好的条纹叶枯病抗性,抗性水平与目前华东地区广泛利用的抗源镇稻88相当,且抗性表现为显性遗传。分子标记鉴定发现,其中3份材料与镇稻88抗性位点一致,而其余材料与镇稻88不同。这些抗性材料育成的后代抗性好、产量高,是培育江浙沪等晚粳稻区条纹叶枯病抗性品种的优质亲本。

Abstract:To enrich Oryza sativa resistance resources against Rice stripe virus (RSV) and accelerate resistant cultivar breeding, 69 indica and japonica varieties from southern China and eastern China were detected with two assays in Zhejiang and Jiangsu: artificial infestation by Laodelphax striatellus which isinsect host of RSV and natural induction of the RSV disease symptoms in the field. Among 69 lines used in this study, 11 cultivars displayed preferable resistance to RSV, as the positive control Zhendao88 did. Genetic analysis showed that the resistance trait was dominant. Interestingly, 3 cultivars possessed the same resistant locus with Zhendao88, while 8 ones did not, demonstrating that the resistance resources were diverse. The offspring of these materials with good resistance and high yield were good parents for breeding of RSV resistant varieties in the distribution area of late O.sativa ssp. japonica in southeastern China.

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