摘要
洛夫林系统小麦是由罗马尼亚引进的抗锈良种,该系统品种除在陇南局部种植外,主要用作小麦抗条锈育种的抗源。北京、山东、陕西、甘肃、河北、河南、山西等省(市)许多育种单位用洛夫林10号(Lovrin 10)和洛夫林13号(Lovrin 13)作抗源已选育了一批优良品种或品系,有希望取代目前华北、西北广大冬麦区已丧失抗条锈性的一些主栽品种。
Lovrin 10 and Lovrin 13 are important resistant sources for rust resistant breeding of wheat in China.Their resistance has broken down in recent years in south Gansu Province.Epidemiological studies show that the breakdown is a gradual variant process,running parallel with the increase of acreage under the two cultivars.Several geophytopathological features are favourable to the breakdown,viz.(1)the cultivars are grown at different altitudes above the sea level(from 1,000 to 1,950 meters),so that the rust pathogene can oversummer and overwinter in the same region and new races appear and increase in population rapidly;(2)the climate is cool during the growing season;and(3)the ecological conditions accelerate variations of resistance of wheat cultivars.The main cause for the breakdown of the Lovrin cultivars is that their resistance greatly decreases at low temperature.On the other hand,it is also related to the appearence and development of rust strains hypersensitive to low temperature in south Gansu.Experiment in the greenhouse shows that they are able to infect Lovrin cultivars below 10℃.
作者
李振岐
商洪生
阴省林
强中发
赵宜谦
陆和平
洪锡午
宋位中
刘守俭
Li Zhenqi;Shang Hongsheng;Yin Xinglin;Qiang Zhougfa;Zhao Yiqian;Lu Heping;Hong Xiwu;Song Weizhong;Liu Shoujian(Department of Plant Protection,the Northwestern College of Agriculture,Wugong,Shanxi Prouince;Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing;Institute of Plant Protection,Gansu Academy of Agricultural Sciences,Lanzhou,Gansu Province)
出处
《中国农业科学》
1984年第1期68-74,共7页
Scientia Agricultura Sinica
