摘要： 对1998～2000年月中下旬(春播)和6月上旬(夏播)种植的1 607份玉米早代系进行田间自然抗性鉴定表明:播期对玉米早代系田间抗病性具有很大的影响.玉米早代自交系大斑病和粗缩病以春播发生较重,而小斑病和茎基腐病以夏播发病较充分.因此,在鉴定玉米早代系田间抗性时应根据鉴定病害对象安排在不同播期进行.

关键词: 玉米, 早代系, 播期, 病害, 田间抗病性

Abstract: In order to f ind out the disease resistance of maize early general inbred lines. Tw o cult-i vars w ere planted in spring (14/ 4-21/ 4) or summer (7/ 6-10/ 6) and show ed that planted per-i od do g reat effect s on disease resistance of maize early inbred lines, especially on the resistance of diseases such as leaf blight of maize, maize st reak and maize dw arf mosaic w hich are seriously produced in spring planted, as leaf spot of maize and stem rot of maize w hich are produced in summer planted. According to different maize diseases to arrange different planted period, it w ould produce more maize inbred lines w ith high disease resistance.

Key words: Maize, Early general lines, Planted period, Disease resistance

中图分类号: 

• S35.9