Marçon A, Kaeppler S M, Jensen S G
Research Graduate Student, University of Nebraska-Lincoln, Department of Agronomy, Lincoln 68583-0915.
Assistant Professor, University of Wisconsin, Department of Agronomy, Madison 53706-1597.
Plant Dis. 1997 Feb;81(2):195-198. doi: 10.1094/PDIS.1997.81.2.195.
High plains virus (HPV) is a pathogen that causes a severe disease, especially in susceptible corn genotypes. The virus is transmitted by the eriophyid mite Aceria tosichella, which also transmits wheat streak mosaic virus (WSMV). This often results in a mixed infection by these two viruses. Genetic variability for resistance to the HPV exists among maize inbred lines but has not been characterized. The disease reaction of 30 maize inbred lines to the mixed infection and to WSMV alone was characterized in this study. Evaluation was based on symptom expression and virus titer (HPV and WSMV), as measured by enzyme-linked immunosorbent assay. All lines showed some HPV symptoms, which ranged from a few visible spots to rapid plant death. HPV-resistant inbreds include B73 and B14. Susceptible inbreds include W64A, Wf9, H100, N213, N215, and N194. Five of the six inbreds most severely affected by HPV also had a high WSMV titer, although they displayed few symptoms when inoculated with WSMV alone. Inbred N194 was one of the genotypes most susceptible to HPV, but it showed no detectable WSMV titer. Seedlings of highly susceptible genotypes often died within 2 weeks of infection.
高平原病毒（HPV）是一种能引发严重病害的病原体，尤其是在易感玉米基因型中。该病毒由瘿螨Aceria tosichella传播，这种瘿螨也传播小麦条纹花叶病毒（WSMV）。这常常导致这两种病毒的混合感染。玉米自交系中存在对HPV抗性的遗传变异，但尚未得到鉴定。本研究对30个玉米自交系对混合感染以及单独对WSMV的病害反应进行了鉴定。评估基于症状表现和病毒滴度（HPV和WSMV），通过酶联免疫吸附测定法进行测量。所有自交系都表现出一些HPV症状，从少数可见斑点到植株迅速死亡不等。对HPV具有抗性的自交系包括B73和B14。易感自交系包括W64A、Wf9、H100、N213、N215和N194。受HPV影响最严重的六个自交系中有五个WSMV滴度也很高，尽管它们单独接种WSMV时几乎没有症状表现。自交系N194是对HPV最易感的基因型之一，但未检测到WSMV滴度。高度易感基因型的幼苗在感染后2周内常常死亡。
