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六年来(1962～1967)鉴定了从张家口、黑龙江、甘肃、山西、内蒙、青海和北京等地收集的193株晚疫病菌。这些菌分别属于00,0,1,4,1.4,2.4和1.3.4七个小种。以小种4为最常见,其次为1.4,0与1.3.4;00,1,2.4都只发现过一次。张家口地区以小种4为主,占63.0%。1962年比较简单,1963、1964年增加了复杂小种1.4与1.3.4,而以后几年又恢复到原来的单纯为小种4的状况。黑龙江则以小种0为主,1.3.4也很普遍。青海、内蒙、山西为小种4,北京为1.4。甘肃则有小种4,1.4,和00。针对病菌生理小种变化的情况,作者提出了利用水平(田间)抗病性、有条件地利用垂直(显性基因)抗病性等相应的育种防病意见,并对有关问题进行了讨论。
In the past six years (1962 ~ 1967), 193 Phytophthora infestans were collected from Zhangjiakou, Heilongjiang, Gansu, Shanxi, Inner Mongolia, Qinghai and Beijing. These bacteria belong to 00,0,1,4,1.4,2.4 and 1.3.4 seven races. To race 4 is the most common, followed by 1.4,0 and 1.3.4; 00,1,2.4 have only been found once. Zhangjiakou area to race 4-based, accounting for 63.0%. 1962 is relatively simple, 1963, 1964 increased the complexity of races 1.4 and 1.3.4, but in the next few years has returned to the original simple races 4 situation. Heilongjiang Zeyi 0 species-based, 1.3.4 is also very common. Qinghai, Inner Mongolia, Shanxi 4 for the races, Beijing is 1.4. Gansu there are races 4,1.4, and 00. In view of the changes of pathogenic bacteria race, the authors put forward some suggestions on the use of horizontal (field) disease resistance, conditional use of vertical (dominant gene) resistance and other appropriate breeding and disease prevention, and discussed the related issues.