To evaluate scientifically the yield, adaptability, stability and testing sites discrimination and representativeness of varieties（lines） in leaf-vegetable sweetpotato joint identification trials in China, the AMMI model and GGE biplot were used to analyze the yield data of ten varieties（lines） in nine testing sites during 2018-2019. The productive and stable varieties suitable for large scale promotion as well as the testing sites with good discrimination and representativeness were screened. The results showed that the yield of leaf-vegetable sweetpotato reached highly significant in genotype effect, environment effect and interaction effect. Environment effect accounted for the largest proportion, followed by interaction effect, and genotype effect was the smallest. Xiangcaishu No.3 had higher productivity and stability, and it was the closest to the ideal variety, which was suitable for large area promotion. Qiancaishu No.2, Shulü No.2, EC15, Haida 7798 and Fucaishu 25 had better productivity, but had mediocre stability, so they were suitable for promotion in specific areas. The most suitable variety（lines） in Changsha, Hunan province was Shulü No.2, followed by Haida 7798 and Fucaishu 25. For Wuhan of Hubei, Chongqing, Qionghai of Hainan, Fuzhou of Fujian and Guangzhou of Guangdong, the most suitable variety（lines） was Qiancaishu No.2, followed by EC15. Qionghai of Hainan and Fuzhou of Fujian were the more discriminating and representative testing sites and more suitable as identification test sites for vegetable sweetpotato. In this study, AMMI and GGE analytical models were used simultaneously in vegetable sweetpotato yield analysis for the first time, and the application effects were demonstrated. And the varieties（lines） suitable for large-scale promotion and planting in specific areas were identified, and the best identification test points were determined, which provided a theoretical reference for the rational promotion of new leaf-vegetable sweetpotato varieties and scientific regional test.

通过使用20％聚乙二醇(PEG)-6000模拟干旱环境验证光合参数对于甘薯抗旱评价的适用性,并优化甘薯抗旱评价方法.结果表明,通过丙二醛(MDA)含量和相对含水量(RWC)变化值鉴定了3个甘薯栽培种的耐旱性,24、72 h干旱胁迫下甘薯抗旱性表现一致,均为潮薯1号抗旱性最强,徐薯18居中,福薯7-6最弱.分别测量3、24 h干旱胁迫处理下净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)和胞间CO2浓度(Ci)4个光合参数的变化值,24 h干旱胁迫下光合参数的变化与MDA含量和RWC变化一致.相关性分析结果表明,4个光合参数与MDA含量、RWC均有极显著相关性,其中Ci与MDA含量、RWC的相关系数均最大,证明了4个光合参数均可作为抗旱评价指标.对24 h干旱胁迫下4个光合参数的变化值进行主成分分析,第1主成分的特征值为3.90,累计贡献率达到97.39％,基于主成分分析方法利用光合参数建立了甘薯抗旱性综合评价指数模型.