摘要
1985-1986年,以“HA-4”、“Ba-90-2”、“红突31”、“HA84494”、“V/38”、“837”及“早选4号”为供试品种,研究了水稻品种的慢瘟抗性。结果表明:病斑大小、单位病斑的产孢量、最终百分病叶面积及病害进展曲线下的面积是慢瘟抗性的4个组分,4个组分间彼此高度相关(r-0.8082～0.9741)。就4个慢瘟组分对8个品种做聚类分析,可将供试品种划为3类。“HA-4”、“Ba-90-2”、“缸突31”、“HA84494”及“1952”是慢瘟品种,“V/38”是中慢品种,“837”与“早选4号”为速瘟品种。以ZC_(15)为代表菌研究的慢瘟品种对ZC_(13)、ZE_3、ZF_1及ZG_(14)个生理小种呈类似的慢瘟反应,在田间自然诱发试验田里,也皆表现为抗病。室内外慢瘟性研究结果高度相关(r=0.9972)。
The slow-blasting resistance of rice varieties HA84494, HA-4, Ba-90-2, Hongtou 31, V/38, 837 and Zhaoxuan 4 to physiological race ZC15 of Pyricularia oryzae was tested from 1985 to 1986. The results showed that lesion size, number of spores produced per lesion, last percent diseased leaf area and areas under diseased progress curves are components of slow-blasting. These 4 components were highly related to each other (r=0.8082-0.9741). By cluster analysis to 8 varieties on 4 components the varieties tested could be divided into three classes: stow-blasting varieties 1952, Ha84494, HA-4, Ba-90-2 and Hongtou 31, intermediate-blasting one V/35, and fast-blasting ones 837 and Zhaoxuan 4. The slow-blasting varieties studied with physiological race ZC15 were resis- tant to other races: ZC13, ZE3, ZF1 and ZG1 and also showed its dilatory resist- ance in the experimiental fled, in Chongyong County, Hubei Province.
出处
《湖北农学院学报》
1990年第1期16-23,共8页
Journal of Hubei Agricultural College
关键词
水稻
稻瘟病菌
慢瘟性
慢瘟组分
rice
rice blast
stow-blasting
components of slow-blasting
