28份甘薯种质的产量和营养及食味评价

根据对比试验观测数据,评价了28份优质食用型甘薯种质的产量、营养和食味.结果表明:①烟紫薯176、海南黑肉薯和徐薯23等为优异育种材料；②紫薯的平均鲜薯产量、薯干产量和淀粉产量是黄薯和白薯的62.3％～ 73.2％,但其蛋白质、维生素C和胡萝卜素含量高于黄薯和白薯；③鲜薯、薯干和淀粉产量之间呈极显著正相关；鲜薯产量与干物率、粗淀粉含量均呈负相关；干物率和淀粉含量呈极显著正相关；可溶性糖含量与干物率、粗淀粉含量均呈极显著正相关；维生素C含量与干物率、淀粉含量均呈极显著正相关,与可溶性糖、蛋白质含量均呈显著正相关；食味与各产量性状、营养成分之间的相关性均不显著.

Evaluation of the yield, nutritive content and eating quality in sweet potato germplasm containing 28 cultivars

The yield,nutritive content and eating quality of 28 sweet potato cultivars were evaluated in Hainan,China.The results indicated that: ①Cultivars Yanzishu 176,Hainan Heiroushu and Xushu 23 could be considered as promising breeding materials.②The average fresh root yield,dry root yield and starch yield of purple sweet potato were 62.3% 73.2% of those of the yellow and white sweet potato,but the protein,vitamin C and carotene content of the purple sweet potato were higher than those in the yellow and white sweet potato.③There was very significantly positive correlation between fresh root yield,dry root yield and starch yield;The fresh root yield was clearly negative correlated with dry matter content and starch content;The dry matter content was very significantly positive correlated to starch content;The soluble sugar content was very significantly positive correlated to dry matter content and starch content;The vitamin C content was very significantly positive correlated to dry matter content,starch content,soluble sugar and protein content;There was no significant relationship between the eating quality and the nutritive yields and nutritive content.