Objective  To expand and utilize the resource of colored potato germplasms for breeding new varieties.

  Method  Six new germplasms, obtained from Huasong Seeds Industry (Beijing) Co., Ltd. and others, were evaluated at Crop Institute. In November 2017, experiments were conducted at the Qingkou Station to determine the agronomic characteristics, yield and quality of these cultivars and the harvested tubers.

  Result  The yields of these new cultivars were lower than that of the reference. However, vitamin C content was significantly higher in the new varieties with the highest of 47.7 mg·hg^-1 in Huasong 66. The starch content of 22.4 g·hg^-1 in Qingshu 9 was the highest of all, while the reducing sugar of 0.57 g·hg^-1 in Hongmei, the lowest. The quality of Huasong 88 tubers was outstanding with higher protein, vitamin C, starch and total amino acid contents than control. Its protein at 3.18 g·hg^-1, lysine at 119 mg·hg^-1, isoleucine at 75 mg·hg^-1, phenylalanine at 83 mg·hg^-1, leucine at 120 mg·hg^-1, threonine at 87 mg·hg^-1, histidine at 41 mg·hg^-1, asparaginic acid at 546 mg·hg^-1, serine at 77 mg·hg^-1, glycine at 71 mg·hg^-1, tyrosine at 68 mg·hg^-1, proline at 71 mg·hg^-1, and total amino acids at 2277 mg·hg^-1 were the highest of all tested species.

  Conclusion  Considering the agronomic traits of the cultivars and the tuber quality as well as timely, effective utilization of resource, Huasong 88, Huasong 66 and Qingshu 9 were recommended for new variety crossbreeding.