云南野生稻对稻瘟病的抗性评价  

Resistance Assessment of Yunnan Wild Rices to Blast

作　　者：梁斌[1] 肖放华[2] 黄费元[2] 彭绍裘[2] 陈勇[1] 戴陆国[1] 刘二明[2] 

机构地区：[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

出　　处：《中国水稻科学》1999年第3期183-185,共3页Chinese Journal of Rice Science

基　　金：国家自然科学基金;滇沪合作项目

摘　　要：以Tetep、B4o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（oryzarufipogonGriff．）、疣粒野生稻（oryZameyerianaBaill．）、药用野生稻（oryzaofficinalisWall．）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，病斑孢子层组达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；疣粒野生猪发病最迟，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。ln contrast with Tetep (resistant) and B4o(susceptible), the blast resistance of three Yunnan wild rices (oryzaoffcinalis 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 5grade, 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 l grade, 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. rufipogonhighly susceptible ; o. officinalis susceptible, and o. meyeriana moderately resistant.

关 键 词：野生稻 稻瘟病 抗性 评价 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]