A method for rapid seedling growth of jujube hybrid seeds based on soilless cultivation

Abstract

The invention discloses a jujube tree hybrid seed rapid seedling method based on soilless culture. By the technical measures of refrigeration of hybrid fruits, seed soaking and pregermination with warm water, sowing in a greenhouse, preparation of a seedling substrate, nutrient solution management in the raising seedling period, nutrient solution management in the growth and flowering period and the like, rapid seedling formation of jujube tree hybrid seeds is achieved, and a hybrid population is obtained. By means of the method, the emergence rate of the jujube tree hybrid seeds reaches 57-68%, the planting percent reaches 35-58%, the percentage of flowering plant reaches 62% next year, compared with conventional outdoor sowing, the planting percent of the jujube tree hybrid seeds is greatly increased, seedlings quickly enter the flowering period, and the seed breeding period is shortened. A new path is opened for the rapid seedling culturing of the hybrid seeds and large-scale construction of hybrid populations in the jujube tree hybridization, and the method has a very high application value, and also has a referential significance for culture of hybrid generations of other fruit trees.

Description

technical field [0001] The invention relates to a method for rapidly growing seedlings of jujube hybrid seeds by using a soilless culture technique. Background technique [0002] Hybrid breeding is one of the most commonly used and effective fruit tree breeding methods. Jujube is the dominant fruit tree native to my country and the largest dry fruit tree species. However, due to the small flowers of jujube trees, the difficulty of artificial detasseling, and the fruit setting rate of only about 1% and serious embryo abortion, the probability of obtaining hybrid seeds on jujube trees is only about one in ten thousand. How to quickly cultivate very rare hybrid seeds into seedlings and evaluate the traits of hybrid offspring in advance is one of the keys to improve the efficiency of jujube hybrid breeding. At present, the hybrid seed is generally processed by the sand layering method, and the hybrid seed is sown in the open field in the next spring, but the hybrid seed emerge...

AI Technical Summary

Problems solved by technology

At present, the sand layering method is generally used to process hybrid seeds, and the next spring is sown in the open field, but the hybrid seed emergence rate of this method is usually only about 20%, and it takes a long time. It usually takes more than 2 years for the seedlings to bloom

Although embryo culture technology can also be used to obtain jujube hybrid progeny seedlings, the technology is complicated, and the seedling rate after domestication and transplanting is generally less than 10%, and it is not suitable for large-scale hybrid progeny populations to grow into seedlings.

At present, soilless cultivation has been widely used in the production of vegetables, flowers, etc., but there are not many applications in the production of perennial woody fruit trees due to the high technical difficulty. There is no report on the soilless cultivation technology of jujube trees.

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