A new double cropping potato variety, ‘Gangseon’, was bred by the Highland Agriculture Research Institute, National Institute of Crop Science (NICS), RDA, Korea, in 2016. ‘Gangseon’ was obtained from the cross between ‘Daegwan1-83’ and ‘Chubaek’ in 2006. Seedling and line selection was performed from 2008 to 2009, and preliminary and advanced yield trials were carried out with ‘Gangseon’ from 2010 to 2013 in Gangneung city. The regional yield trials were conducted in Gangneung, Muan, and Jeju from 2014 to 2016. ‘Gangseon’ has light purple flowers, green narrow leaflets and petioles with medium anthocyanin coloration, round tubers with yellow russet skin, and yellow flesh. The dormancy of ‘Gangseon’ stored in 20 ℃ was 60-70 days after harvesting, which is longer than those of ‘Dejima’ and ‘Chubaek’, but shorter than that of ‘Superior’. The average yields of tubers in the spring and fall seasons were 36.6 and 21.2 ton⋅ha^-1, respectively, in the regional yield trials. It is susceptible to common scab and potato virus Y, but has high resistance to potato leaf roll virus, potato virus X, early blight, and late blight. The dry matter contents were 22.1% in spring and 19.8% in autumn. The adaptation area of ‘Gangseon’ is the southern coastal area, including Jeju Island, Korea. The plant variety protection right of ‘Gangseon’ was registered in April 2020, and its grant number is 8081.

A new double cropping potato variety, ‘Geumseon,’ was bred by Highland Agriculture Research Institute, National Institute of Crop Science, Rural Development Administration in 2014. ‘Geumseon’ was obtained from the cross between ‘Chuyoung’ and ‘Daegwan1-87’ in 2005. The seedling and line selections of ‘Geumseon’ were performed from 2006 to 2007 and preliminary and advanced yield trials were carried out from 2008 to 2011 in Gangneung. The regional yield trials were conducted in three locations (Gangneung, Muan, and Jeju) from 2012 to 2014. ‘Geumseon’ has white flowers, green narrow leaflets and petioles, and short oval tubers with beige skin and white flesh. The dormancy of ‘Geumseon’ was 60-70 days in 20℃ after harvest, which is longer than those of ‘Dejima’ and ‘Chubaek’. The average yield of tubers in spring and fall were 42.1 and 25.8 ton ha^-1 in the regional yield trials, respectively. It is susceptible to common scab, late blight, and potato virus Y, but has a high resistance to potato leaf roll virus and potato virus X. The dry matter content was 21.9 and 23.0% in spring and fall season, respectively. Plant variety protection right of ‘Geumseon’ was registered in November 2018, and its grant number is 6924.

‘Dami’ was released by the potato breeding program at the National Institute of Highland Agriculture (NIHA), National Institute of Crop Science, Rural Development Administration. To develop a potato cultivar suitable for spring and summer cropping with good taste, a cross of ‘Daegwan 1-97’ × ‘Daegwan 1-98’ was made in 2005. One of the progenies selected, clone number P05855-18, was validated for key agronomic characteristics required for spring cultivation in Gangneung and summer cultivation in Pyeongchang from 2009 to 2011. Subsequently, P05855-18 was advanced to nationwide field trials and renamed as ‘Daegwan 1-121’. Regional adaptations of ‘Daegwan 1-121’ were tested in Cheongju, Najoo, Gangneung, and Pyeongchang between 2012 and 2014, and finally registered as a potato cultivar, ‘Dami’, based on key agronomic characteristics, including mid-maturity, semi-erect growth habit, and consumer traits including round tuber and very shallow eye-depth. ‘Dami’ has yellow skin and white flesh. The leaves are green, and white flowers bloom abundantly. Physiological tuber disorders, such as malformation, cracks, and internal defects, were less frequently observed than those in ‘Superior’. ‘Dami’ was moderately resistant to potato late blight and viruses. The average tuber yield was approximately 5% higher than that of ‘Sumi’ and the dry matter content was approximately 20.5%. The taste of the boiled whole potato was considered excellent, owing to floury characteristics, and the potato was suitable for table usage (Grant No. 6926).