10个叶菜型甘薯品种茎尖总黄酮质量分数及其稳定性的分析与评价

Analysis and Evaluation of Total Flavonoids and Their Stability in Shoot-Tips of Ten Leaf-Vegetable Sweet Potato Varieties

测定了10个叶菜型甘薯品种在2018-2019两个年度12次采收期的茎尖及其叶片、叶柄和茎3个部位的总黄酮质量分数,并运用DPS数据处理系统对10个品种的总黄酮质量分数及其稳定性进行分析与综合评价,以期筛选出具有总黄酮质量分数高且稳定性好的品种.结果表明:10个品种茎尖及其3个部位的总黄酮质量分数受采收期、品种两个因素的主导影响,但二者影响的相对大小在不同年份有差异;采收期对总黄酮质量分数既有提高的正向效应,也有降低的负向效应.叶片是决定茎尖总黄酮质量分数的主要器官.广菜薯7号、海大7798和黔菜薯2号属于总黄酮质量分数高且稳定性好的优质叶菜型品种.

In the present paper,the contents of total flavonoids in shoot tips and its leaves,petioles,stems of ten leaf-vegetable sweet potato varieties from twelve topping times in 2018-2019 were determined.In order to screen out the varieties with high total flavonoids content and good stability,these total flavonoids and their stability were analyzed and comprehensively evaluated by DPS.The results show that the contents of total flavonoids in shoot tips and its three parts of ten leaf-vegetable sweet potato varieties were mainly influenced by the topping times and the varieties,but the relative influence of the topping time effects and the variety effects are differences in different years.The topping times had both positive effects of increase and negative effects of decrease on the contents of total flavonoids,and the leaves were the main organ that determined the total flavonoids content of the shoot tips.According to the comprehensive evaluation,the Guangcaishu NO.7,Haida 7798 and Qiancaishu NO.2 belong to the high quality leaf-vegetable sweet potato varieties with high total flavonoids and good stability in this paper.