玉米小斑病菌CI小种侵染特征的病理指标比较研究  

A Comparative Analysis of Different Pathological Traits of the Infective Characters of Helminthosporium Maydis Race CI

作　　者：李大良 黄西林[1,2,3,4] 高海水[1,2,3,4] 路凤银 刘克明[1,2,3,4] 马春红 

机构地区：[1]河南省种子公司 [2]河南农业大学 [3]河南省农科院 [4]河北省农林科学院

出　　处：《河南农业大学学报》1997年第1期28-34,共7页Journal of Henan Agricultural University

摘　　要：试验选用１１套同核异质材料，采用田间鉴定与室内鉴定相结合的方法，依据寄主细胞、组织、个体、群体对ＣＩ小种的不同反映，分别对ＨＭＣＩ毒素对玉米根冠细胞致死率、针刺病斑长度、幼根生长抑制率、乳熟期病斑长度和面积、接种２０ｄ及乳熟期病情指数７个病理指标进行了比较研究与筛选。结果表明：（１）乳熟期病斑面积可以作为测定寄主对ＣＩ小种抗性的单一病理指标；（２）确定了综合评价寄主对ＣＩ小种及其毒素综合抗性的３个主成分参数；In the experiment 11 different genotypes in Cms Rb(Bb),Cms C,Cms Es and normal cytoplasms were used,field test was combined with laboratory test,and the seven pathological traits such as the mortality rate of root cap cell,the lesion area and length,etc.,were investigated,analysised and compared with each other,The recults are as follows:(1)The lesion area can be taken as the only pathological trait to review the resistance of maize to Hel.may disrace CI;(2)Three comprehensive coefficients to review the multiple resistance of maize to Hel.maydis race CI and HMCI torin have been determineel;(3)The mortality rate of root cap cell may act as an indicator to detect the activity of HMCI toxin and the rind of new male sterile cytoplasms.

关 键 词：玉米 小斑病菌 小种 病理指标 

分 类 号：S435.131.4[农业科学—农业昆虫与害虫防治]