中国水稻科学

中国水稻科学

• 研究简报 • 上一篇    下一篇

云南野生稻对稻瘟病的抗性评价

梁 斌1;肖放华2;黄费元2;彭绍裘2;陈 勇1;戴陆园1;刘二明2   

  1. 1云南省农业科学院 农作物品种资源站，云南 昆明 650205； 2 湖南省农业科学院 植物保护研究所， 湖南 长沙 410125
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-07-10 发布日期:1999-07-10

Resistance Assessment of Yunnan Wild Rices to Blast

Liang Bin; Xiao Fanghua; Huang Feiyuan; Peng Shaoqiu; Chen Yong; Dai Luyuan; Liu Erming   

  • Received:1900-01-01 Revised:1900-01-01 Online:1999-07-10 Published:1999-07-10

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摘要： 以Tetep、B40为抗、感对照品种,在湖南省烟溪病区病圃,采用自然诱发,鉴定云南普通野生稻(Oryza rufipogon Griff.)、疣粒野生稻(Oryza meyeriana Baill.)、药用野生稻(Oryza officinalis Wall.)以及小粒野生稻对稻瘟病的抗性。结果表明:药用野生稻发病最早,叶瘟病级严重度达到7级,病斑孢子层级达5级;云南普通野生稻中,景洪普通野生稻病级严重度达7级,病斑孢子层级5级,元江普通野生稻病级严重度达8级,病斑孢子层级7级;疣粒野生稻发病最迟, 病级发展缓慢,病级严重度为3级,病斑孢子层级1级。同田的小粒野生稻高抗稻瘟病。三种云南野生稻对稻瘟病的抗性评价为普通野生稻高感,药用野生稻感,而疣粒野生稻为中抗。

关键词: 野生稻, 稻瘟病, 抗性, 评价

Abstract: ln contrast with Tetep (resistant) and B4o(susceptible), the blast resistance of three Yunnan wild rices (Oryza offcinalis Wall., Oryza rufipogon Griff., and Oryza meyeriana Baill. ) were identified. The results indicated that o.offcinalis was infected at first, and its leaf blast severities and spore layer scales of lesions at seedIing stage were 7 and 5 grades, respectively. Jinhong common wild rice's were 8 and 7 grade, Yuanjiang common wild rice's were 9 and 7, respectively. O. meyeriana was infected late and scattered slowly, and at 3 and 1 grades, respectively. on the other hand, O. minuta resisted the blast in the same field. Thus,the blast resistance types of Yunnan wild rices were assessed as follow: O. rufipogon highly susceptible; O. officinalis susceptible, and O. meyeriana moderately resistant.

Key words: wild rice, rice blast, resistance, evaluation