三个紫薯品种花青素和干物质积累动态及相关分析

摘要

利用3个紫薯品种为研究材料，分别测定栽插后60，75，90，105，120，135 d的块根花青素含量、干物率等16个经济性状指标，研究紫薯块根花青素和干物质积累的动态变化以及其与主要经济性状的相关性。研究表明：3个紫薯品种的块根花青素含量和干物率的动态变化因品种不同而表现较大差异，块根花青素含量表现为“前降后升”和“前升后降”两种类型；块根干物率则表现为“曲折上升”和“先升后降”两种类型。而3个品种的花青素总量和块根干物质总量在整个块根膨大期都表现为持续增加。块根花青素含量与15个经济性状指标的相关分析表明，3个品种的花青素含量主要与地上部分鲜质量指标呈显著负相关；与块根干物质含量指标呈显著正相关。%Three purple-fleshed sweetpotato varieties were used as the research material in this study.To⁃tal of 16 economic traits were measured such as anthocyanin content, dry matter content, etc. respectively, at 60,75,90,105,120 and 135 d after planting,to study the dynamic variations of anthocyanin and dry matter ac⁃cumulation of roots and their relationships with major economic traits in purple-fleshed sweetpotato.The results showed that the dynamic variations of anthocyanin and dry matter accumulation of roots were different due to the different varieties. The dynamic variations of anthocyanin content showed two types which were “first de⁃crease and then increase”and“first increase and then decrease”. The dynamic variations of dry matter content showed two types:“devious ascending”and “first increase and then decrease”,while the total anthocyanin contents and dry matter contents of the three varieties showed a continuous increasing trend throughout the tu⁃ber enlargement.The correlation analysis of anthocyanin content with other 15 economic traits indicated that the anthocyanin content of the three purple-fleshed sweetpotato varieties had a significant negative correlation with the ground fresh weight,and significant positive correlation with the dry matter content of roots.