1979年,利用不同来源,不同世代的182个自交系(当年春季未完全成熟)的种子,在南京秋季多雨的自然条件下进行大小斑病的鉴定。各自交系种子于7月21日播种,7月下旬出苗。播后一个月内每周灌溉一次,9月1～25日先后授粉。10月6日对自交系植株中部五叶进行田间病株率、病叶率、病级(分0、1、2、3、4、5、6七个等级)和病斑类型 In 1979, the seed of 182 inbred lines from different origins and generations (which did not fully mature in spring of that year) was used to identify the southern and southern rains in Nanjing. The seeds of their respective crosses were planted on July 21 and germinated in late July. Once a week after sowing irrigation once a month, September 1 to 25 have pollination. October 6 on the inbred line plant five leaves in the field disease rate, diseased leaf rate, disease grade (0,1,2,3,4,5,6 seven grades) and the type of lesion