自然诱发条件下湖北省水稻主栽品种对稻瘟病、纹枯病的抗性鉴定

Assessment of the Variety Resistance to Pyricularia grisea and Rhizoctonia solani Induced under the Natural Condition in Hubei Province

选用湖北省主栽水稻品种88份,分别在崇阳、远安、武汉三地进行田间自然诱发稻瘟病和纹枯病。抗性鉴定试验结果表明,武汉地区未发生稻瘟病,崇阳、远安两地88个品种除武运粳7号外几乎全部发病,发病率达98.86%。抗稻瘟病的早、中晚稻品种数分别为14份和23份,分别占参试品种的45.16%和40.35%。崇阳、远安、武汉三地综合分析显示,88份水稻品种中抗纹枯病品种13份,占参试品种的14.77%。

The experiments of rice variety resistance to Pyricularia grisea Sacc. and Rhizoctonia solani Kühn were carried out in Chongyang, Yuanan and Wuhan, respectively, induced in natural condition in the field. Eighty eight rice varieties were used to be planted in Hubei Province. The results showed that the blast caused by P. grisea did not occur in Wuhan, but severely occured in Yuanan and Chongyang. The 88 rice varieties except Wuyungeng 7 were susceptible to the diseases. The percentage of diseased varieties was 98. 86%. The amount of resistance varieties of early rice and middle-late rice were 14 and 23,accounted for 45.16% of early rice and 40.35% of middle-late rice,respectively. The data of Chongyang,Yuanan and Wuhan were synthetically analyzed. The results showed that there were 13 resistance varieties against R. solani,account for 14. 77% of tested rice varieties.