１前言寿宁县地处福建省东北部，气候凉爽，无霜期短，昼夜温差大，适于马铃薯生长发育，常年种植面积３３００ｈｍ２。但由于现有的马铃薯品种德友１号已种植多年，种性退化严重，抗性明显衰弱，产量低下。为了促进品种的更新换代，满足广大群众对优良品种的迫切需求，我... 1 Introduction Shouning County is located in northeastern Fujian Province, the climate is cool, frost-free period is short, large temperature difference between day and night, suitable for potato growth and development, perennial planting area of ​​3300hm2. However, since the existing potato variety Deyou 1 has been planted for many years, the species degenerated seriously, the resistance was obviously weaker and the yield was low. In order to promote the upgrading of breeds and meet the urgent needs of the vast masses of fine breeds, I ...