LI Jianwu, WEN Guohong, LI Gaofeng, WANG Yihang, JIA Xiaoxia, ZHANG Rong, MA Sheng
In order to evaluate the starch yield and nutritional quality traits of potato with high starch content, fifteen varieties (clones) from Gansu Academy of Agricultural Sciences were planted at fixed location in 2011-2018. After harvest tuber yield, content of nutritional quality (dry matter, starch, vitamin C, crude protein, reducing sugar) and mineral elements (potassium, calcium, ferrum and zinc) were detected. The result showed that genotype, environment and genotype-environment interaction had significant effect on all yield and quality traits. The genotypic effect was greater than environmental effect in the yield, starch yield, dry matter content and starch content traits, while the environmental effect of nutritional quality content of vitamin C, protein and reducing sugar are greater than genotype effect. In the 15 tested cultivars (clones), the ranges of total tuber yield (TTY) were 24 549-50 140 kg·hm-2, starch yield (SY) were 4 271-9 298 kg·hm-2, dry matter content (DMC) were 21.07-30.18%, starch content (SC) were 14.63-21.83%, and vitamin C content (VCC) were 12.20-18.95 mg·100g-1, crude protein content (PC) were 2.17-2.71%, reducing sugar content (RSC) were 0.18-0.43%, potassium content (KC) were 4 316-5 368 mg·kg-1, calcium content (Ca) were 85.10-138.40 mg·kg-1, ferrum content (FeC) were 10.17-24.50 mg·kg-1, and zinc content (ZnC) were 2.45-3.80 mg·kg-1. Longshu 8, Longshu 9, Longshu 12, Longshu 14, L0527-2, L08104-12, LZ111 and L1149-2 derived from Atlantic behave high starch content trait with above 18%, L1149-2 was excellent line with TTY of 50 140 kg·hm-2, SY of 9 298 kg·hm-2, DMC of 26.75%, SC of 19.30%, VCC of 14.62 mg·100g-1, PC of 2.52%, RSC of 0.28%, KC of 5 297 mg·kg-1, CaC of 138.40 mg·kg-1, FeC of 20.40 mg·kg-1, ZnC of 3.20 mg·kg-1. The total tuber yield and nutritional quality of Longshu 5 were poor. This study provides a scientific basis for the utilization of high-starch potato varieties of Longshu series, which can also assist for improving the yield and quality of potato varities with high starch content.