利用S1家系密植鉴定选择方法对中综6群体、瑞德群体、黄改群体、335群体进行1～2轮改良,获得改良群体5份,2011年进行改良效果比较试验。结果表明,中综6群体C1、C2与C0比较单株平均产量提高5.44%、9.62%;瑞德群体、黄改群体、335群体C1与C0比较,单株平均产量分别提高4.42%、4.68%、0.04%。同时,改良后的群体仍保持较高的遗传变异,有进一步改良提高的潜力。 In this study, we used S1 family close planting identification method to improve the Zhongzheng 6 population, Reid population, Huanggai population and 335 population for 1 ~ 2 rounds of improvement. Five improved populations were obtained, and the improvement experiment was conducted in 2011. The results showed that the average single-crop yield per plant was increased by 5.44% and 9.62% in C1, C2 and C0, respectively. Compared with C0, the average yield per plant of Reid, Huanggai and 335 increased by 4.42% and 4.68% , 0.04%. At the same time, the improved groups still maintain high genetic variation with the potential for further improvement and improvement.