Abstract‘Daegwang’ was developed in a potato breeding program at the Highland Agriculture Research Institute, National Institute of Crop Science, Rural Development Administration, South Korea. It was selected from the hybrid ‘Haryeong’בP03404-1’ from 2007. In 2011-2012, the major agronomic characteristics of this variety were evaluated in Gangneung for spring cultivation and Pyeongchang for summer cultivation as clone number ‘P07917-4’. ‘P07917-4’ was renamed as ‘Daegwan 1-127’, and regional yield trials for this clone were conducted in Cheongju, Naju, Gangneung, and Pyeongchang in 2013-2015. This cultivar was registered as ‘Daegwang’, based on its key agronomic characteristics, including drought tolerance, late blight resistant, and high yield. It has medium maturity and a semi-erect growth habit. ‘Daegwang’ has a round to short oval tuber shape, shallow eye-depth, yellow skin color, and white flesh color. Its leaf color is green, and its white flowers bloom abundantly. This cultivar is resistant to potato late blight but susceptible to potato common scab. The incidences of hollow heart and internal brown spot were low. However, the frequency of tuber cracking was high, at about 6.0% in summer cultivation in Pyeongchang. In the regional yield trials, ‘Daegwang’ had an average tuber yield of 34.1 ton/ha, which was 6.2% higher than that of ‘Sumi’, and its dry matter content was 16.8%. Boiled ‘Daegwang’ tubers have a viscous-floury texture and a pleasant taste. ‘Daegwang’ is expected to be produced as a table potato. (Registration No. 7664).

‘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).