玉米利用春季未成热种子在南京就地一年种植两代已获成功。为了探究春秋两季种植的玉米自交系性状变化规律和对自交系选育效果的影响,1979年我们对自交系若干性状进行了初步测定。 一、材料和方法 不同来源、不同世代的自交系182个,于7月中旬收获其授粉后20～25天的果穗,阴干2天后播种。7月下旬出苗,9月1～25日先后授粉。收前进行植株性状调查,收获后考种,并对春秋两季自交系当选株的株高、穗位、播种到授粉日期、穗长、穗行数等进行 The use of corn in spring has not been hot seeds planted in Nanjing one year two generations of success. In order to explore the spring and autumn seasons of planting corn inbred lines traits and selective effects on inbred lines, in 1979 we conducted a preliminary determination of some traits inbred lines. I. Materials and Methods 182 inbred lines of different origins and generations were harvested from 20 to 25 days after pollination in mid July and were sown for 2 days after being sun dried. Emergence in late July, September 1 ~ 25 have pollination. Before harvest, the plant traits were investigated and the seeds were harvested after the test. The plant height, ear position, date of sowing to pollination, ear length, number of ear rows and so on