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玉米的杂种优势具有显著的增产效果,而且也为生产实践所证实。但是,在一些主要病害的发生和流行的情况下,仍然不能获得高产,甚至可能遭毁灭性的严重减产。大小斑病是当前玉米生产中的主要病害之一,据统计,仅在东北、西北、华北、华东等地区中的八个省,大小斑病在中等流行的年份,受害面积就达一亿亩左右,损失粮食约34亿斤。抗病育种是防治大小斑病最经济有效的措施,下面就玉米对大小斑病菌的抗病性及抗病育种方法作简要的叙述。一、玉米对大斑病菌的抗病性植物的抗病性是由病原菌的致病性和品种材料的抗病基础在一定的环境条件下相互
Maize heterosis has a significant yield-increasing effect, but also confirmed by the production practices. However, under the prevalence and prevalence of some major diseases, it is still impossible to obtain the serious yield reduction that is even more devastating. Squamous and spot disease is one of the main diseases in current corn production. According to statistics, in the eight popular provinces of Northeast, Northwest, North China and East China, About 3.4 billion pounds of food loss. Disease-resistant breeding is the most economical and effective measures to control the size of spot disease, the following corn on the resistance of the disease pathogen and disease resistance breeding brief description. First, the resistance of the disease to turcicum The resistance of the plant is caused by the pathogenicity of the pathogen and the material basis of disease resistance under certain environmental conditions