Abstract:

To explore the quality differences of yam among varieties, five local yam varieties were collected. The nutritional matter such as soluble sugar, soluble protein and vitamin C were analyzed, and the NO3-N was also detected. The results showed that there were significant differences in the contents of soluble sugar, soluble protein, vitamin C and NO3-N among the varieties. No any one of these varieties demonstrated the complete superiority in those matter content. The higher contents of soluble sugar were TG (44.0 mg/g) and JP (38.2 mg/g) which were significantly higher than those of other varieties, and there no significant difference between themselves. The highest content of soluble protein was TG (11.27 mg/g), and significantly higher than JX, XC and NT. But there was no significant difference between TG and JP (8.09 mg/g). The highest contents of VC were TG (7.64 mg/100 g) and JP (7.11 mg/100 g) which were very significantly higher than those of other varieties. The lowest contents of NO3-N were TG (404.7 μg/g) and XC (647.1 μg/g), and were very significantly lower than those of other varieties. The role of seedling age at those indexes was also analyzed, and it was found that the contents of soluble protein and NO3-N were influenced by seedling age. The better was 1a seedling. Meanwhile, the relation of those matter in yam was analyzed too, and the results showed that there were significantly positive correlation between the content of VC and that of soluble sugar (r=0.7883), soluble protein (r=0.6518) respectively. There was significantly negative correlation between the content of soluble protein and NO3-N (r=-0.54). These results provided scientific basis for yam breeding.