应用秩次变量nij和n′ij,非参数统计量Pi、P′i,Si 和Dj 描述 1 999年全国南方区甘薯品种区试资料的基本特征。研究结果表明 :岩薯 5号是丰产性最佳品种 ,稳定性最好的品种为福薯 2号 ,金山 2 5、岩薯 5号为丰产性与稳定性优良的品种 ;对品种差异具有较高分辨力的试点有 7个 ,分辨力最高的试点为广东省湛江市农业科学研究所 ,发现了 89.1 %的差数为显著 Using the rank variables nij and n’ij, the non-parametric statistics Pi, P’i, Si and Dj describe the basic characteristics of regional trial data of sweetpotato varieties in southern China in 1999. The results showed that: Yanushuang 5 was the best variety with the highest yield, and the best stability varieties were Fushu 2, Jinshan 25 and Ianshu 5 with high yield and stability; High-resolution pilot has 7, the highest resolution of the pilot for Zhanjiang City, Guangdong Province Institute of Agricultural Sciences, found that 89.1% difference was significant