玉米品系对茎腐病抗性鉴定方法研究

在现行的几种玉米成株期接种方法中,以注射、菌剂、牙签和根部接种效果比较好,可按不同抗病鉴定目标选用。抗病性不同的玉米品系植株体内钾、硅含量以及过氧化物酶、酯酶同功酶酶谱及其活性存在很大差异,可做为鉴定品系抗病性的新指标。

STUDIES ON METHODS OF EVALUATING RESISTANCE OF CORN LINES TO STALK ROT

In several inoculation methods used at adult stage of corn,it is better that corn plant were inoculated using pathogenetic fungi culture,spore suspension,toothpick with fungi in corn stalk and pathogenetic fungi culture in corn root. The content of potassium,silicon, the band patterns of peroxidase isozymes and dsterase isozymes and activities of two isozymes are different between resistant lines and susceptible lines. These differences can be used as index of the resistance evaluation in corn lines.