【摘要】 以 B40、Tetep为感、抗稻瘟病对照 ,在全国 4个病区病圃 (云南保山、湖南烟溪、辽宁丹东、广东从化 )采用自然诱发 ,鉴定了 74份云南地方稻种资源的抗瘟性。结果表明 ,感病对照 B40在苗期病斑孢子层级、严重度、病斑叶面积率、穗颈瘟发病率均表现高感 ;抗病对照 Tetep分别为 1级、4级、5 .5 %和 4.79% ;Moroberekan前 3个指标分别为 3级、3级和 1.2 % ,其穗颈瘟发病率较高 ,达到 12 .0 %。云南地方稻种中 ,毫弄早、毫玉浪、大白谷等 3个品种在这 4个指标上表现抗病 ;在这 4个病圃中 ,它们对稻瘟病的抗性比 Tetep和 Moroberekan更强、更稳定 ;毫马粉、孟先大白谷等 2个品种在前 3个指标上表现抗病 ,但感穗颈瘟。更多还原

【Abstract】 In contrast with B40(susceptible) and Tetep, Moroberekan (resistant), the blast resistance of 74 Yunnan conventional rice germplasms were identified at four sites: Baoshan,Yunnan; Yanxi,Hunan; Dandong, Liaoning; and Conghua, Guangdong. The results indicated that B40 was highly susceptible to rice blast; the seedling blast severities, percentage of leaf lesion area, spore layer scales of lesion, and panicle blast of Tetep were 1 grade, 4 grade, 5.5%, 4.79%, respectively. Those of Moroberekan were 3 grade, 3 grade, 1.2%, 12.0%, respectively. On the other hand, Haonongzao, Haoyulang and Dabaigu were resistant at those indices, their resistances to rice blast are higher than that of Tetep and Moroberekan at four sites. Haomafen and Menxiandabaigu were resistant at three of indices, but susceptible to panicle blast.更多还原