Method for producing pre-basic seeds of potatoes

The invention discloses a method for producing pre-basic seeds of potatoes. The method comprises the steps as follows: laboratory production of potato tube seedlings, sugar-free culture and fast propagation in a tube seedling greenhouse, and matrix and liquid culture for producing pre-basic seeds of potatoes. According to the invention, a polypropylene film bag takes the place of a traditional glass container, so that the light transmission and the air permeability are good, the cost is low, the weight is light, and the carrying is simpler; the mode of matrix and liquid culture achieves the purpose of propagating pre-basic seeds in a layered manner, so that not only can vain growth of the overground parts be controlled effectively, and growth and development of creeping stems of plants are ensured, but also forming and expanding of tubers at the top ends can be promoted effectively, and the operation is simple and easy; the pre-basic seeds can be grown in a plurality of seasons in a year, the quantity of pota