国际马铃薯中心(CIP)目前共收集到野生种6010份,经整理后剔除1010份重复的,现保存5000份材料,其中有原始栽培种105份。利用原始栽培种ktzimba与高产品种进行杂交,将抗病基因SY4回交到综合性状好的品种中去。1982年做了一批杂交组合,得到实生苗后代25000份,从中选择出三个耐热、早熟的新品种(LT—5、LT—6、LT—7),二个抗根线虫病的新品种(I—3—34.I—4—10)。该中心正开展抗病毒 At present, the International Potato Center (CIP) collected 6,010 wild species. After sorting, 1010 replicates were deleted and 5,000 were preserved, including 105 original cultivars. Using the original cultivar ktzimba and high-yielding varieties of hybridization, the disease-resistant gene SY4 back to the comprehensive good traits go. In 1982, a batch of hybrid combinations were made and 25000 progenies of seedlings were obtained. Three new heat-resistant and early-maturing varieties (LT-5, LT-6 and LT-7) Variety (I-3-34.I-4-10). The center is developing antivirals