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根据山东省脱毒甘薯种薯繁育和生产应用的实践，总结提出了甘薯脱毒试管苗、脱毒原原种、原种、生产种的四级繁育制度和脱毒种薯分级依据、分级质量标准，同时介绍了适宜黄淮春夏薯区应用的省、市、县、乡相结合的脱毒甘薯生产繁育供应体系，提出了目前甘薯脱毒种薯生产繁育过程中存在的问题和解决途径。
According to the practice of breeding and production of virus-free sweet potato seed in Shandong Province, the four-level breeding system of virus-free test-tube seedlings, detoxification of the original stock, original species and production seed and the grading basis of virus- Standard, at the same time introduces the suitable production and breeding supply system of virus-free sweet potato with the combination of provinces, cities, counties and townships in Huanghuai spring and summer potato areas, and puts forward the problems and solutions in the process of production and breeding of virus-free seed potato.