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引言小麦白粉病(Erysiphe graminis DC. ex Mérat)虽然遍及世界各洲,但仅在多雨的海洋性或半大陆性气候地区具育经济重要性.最近几年在较干燥、炎热的地区,例如在中国(Roelfs,1977)、苏联(Prutskova等,1976)、南亚和西亚、北非和东非(Saari等,1974)以及日本(Yoshida等,1979),由于耕作措施的改变(如灌溉的改变),种植遗传上一致的半矮秆品种,应用生长调节剂以及增施氮肥等,白粉菌已成为重要的病原物.由于大部分生产用品种感染白粉菌的许多分离物,所以需要为育种寻找抗病的寄主材料.尽管许多国家加强了小麦品种和近缘种的筛选,但广泛有效和可用的抗源仍然很少(表1),而且已鉴定出来的某些抗病基因也还没有广泛用于农业.本文根
Introduction Erysiphe graminis DC. Ex Mérat, though endemic to all continents of the world, is economically important only in rainy maritime or semi-continental climates. In recent years in drier and hotter areas, such as in Farmers in China (Roelfs 1977), the Soviet Union (Prutskova et al. 1976), South and West Asia, North and East Africa (Saari et al. 1974) and Japan (Yoshida et al. 1979) planted as a result of changes in farming practices Mildew strains have become important pathogens due to genetically identical semi-dwarf varieties, application of growth regulators and increased nitrogen fertilization, etc. As most production varieties infect many isolates of powdery mildew, there is a need to find disease-resistant Host material Although a large number of countries have screened for wheat varieties and related species, the availability of widely available and available sources remains low (Table 1) and some of the identified resistance genes have not been widely used in agriculture This article root