A kind of sweet potato virus-free seed potato propagation method

Abstract

The invention discloses a sweet potato virus-free breeding method, which comprises the original-original spice seedling breeding, particularly comprises steps of washing a virus-free bottle sprout and adding a medium, then colonizing the sprout on a water planting colonization plate; covering a transparent water-retaining film; and culturing the sprout with tap water; adding 1 / 2 of a first nutrient solution for culturing continuously when the sprout grows new white root; cutting off the shoot tip at the upper portion of the seedling when the seedling grows long for original-original specie production; supplementing 1 / 2 of the first nutrient solution, and cutting off the shoot tip at the upper portion of the lateral bud when the lateral bud grows long for original-original spice production. <{EN2}>According to the method, the tissue culture plants are bred by water planting first, and the survival rate can be up to 100%; the sprouts can be cut once every 7 days; the sprouts can be cut by 5-6 times in one colonization; 1 sprout can breed about 20 sprouts within two months; the factory production of the virus-free sprout can be realized completely to realize vigorous seedling and rapid propagation.

Description

technical field [0001] The invention belongs to the field of crop breeding and relates to a seed potato propagation method. Background technique [0002] sweet potato( I pomoeas batatas Lam. ) is an important grain, feed and industrial raw material crop in my country. It has the advantages of rich nutrition, good yield stability, and high yield, and plays an important role in the social economy. my country's sweet potato planting area ranks first in the world, and its total output accounts for more than 80% of the global total. Sweet potatoes are mainly propagated through stems, tubers and seedlings. During production, they are susceptible to virus infection, causing symptoms such as leaf shrinkage and short plants, resulting in poor quality and reduced yield year by year. The virus infection rate of sweet potato field plants is 30%-60%, and it can reach 80%-90% in severe cases, resulting in 25%-57% yield loss every year. The average annual production reduction in my count...

AI Technical Summary

Problems solved by technology

[0010] ⑥The original seed potatoes can be used as seeds for the production of commercial potatoes, that is, the germinated sprouts of the original seed potatoes are planted in the field, and the sweet potato pieces produced can be used as commercial potatoes; they can also continue to be used as seed potatoes, but the possibility of virus infection increases. Decrease in yield and quality

[0013] 2. The virus-free seedlings are directly cut in the soil, the tubers are slow and the size of the seed tubers is uneven

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