Apple dwarfing self-rooted rootstock SH38 or SH40 large-scale breeding method

Abstract

The invention relates to an apple dwarfing self-rooted rootstock SH38 or SH40 large-scale breeding method. The method is suitable for cultivating SH38 or SH40, and specifically comprises the steps oftaking an SH38 or SH40 grafted seedling which is grafted close to the root part and taking malus robusta as a rootstock or a self-rooted seedling as a seed tree, carrying out annual growth branch budnotching, horizontal branch pressing, fixing and soil burying, performing twisting on the new shoot base newly grown from the horizontally pressed branch, carrying out hormone treatment, matrix land-filling, humidity and fertilization management, seedling lifting, and seedling separation to obtain SH38 or SH40 dwarfing self-rooted rootstock. According to the breeding method, the SH38 or SH40 current year-growth semi-lignified shoot does not leave from the parent body to root, and has the advantages that the propagation conditions are mild, the production process is simple, the technical operability and achievability are high, the seedling rate is high, the seedling quality is good, and the like. By adoption of the method of the invention, the apple dwarfing self-rooted rootstock SH38, SH40can realize large-scale and low-cost propagation, thereby obtaining the apple dwarfing self-rooted rootstock SH38 or SH40 with stable traits, neat and consistent tree growth, early flowering and early fruit, fertilizer saving, water saving, land saving and high uniformity of the fruit shape index.

Description

technical field [0001] The invention relates to the technical field of apple seedling breeding, in particular to a method for breeding apple dwarfed self-root stock. Background technique [0002] Apple dwarfing self-root stock is based on the principle of plant cell totipotency, using the tissues and organs of apple dwarfing rootstock to form root stock through asexual reproduction method. It is produced by the vegetative body of the mother plant, and its heredity is the same as that of the parent, which can ensure the consistency of rootstock seedlings and fruit seedlings. Apple seedling rootstocks are rootstocks obtained by the propagation method of seed sowing. According to "Mendel's law", seeds have the law of segregation and the law of free assortment. Therefore, the seed rootstock is genetically heterozygous, which in turn affects the tree vigor of apple trees and the overall quality and yield of apple fruits. The dwarfing middle stock of apple also belongs to the ra...

AI Technical Summary

Problems solved by technology

Moreover, due to the small size of the cuttings, the nutrients stored in them are extremely limited, and necrosis is prone to occur during the cutting process.

In terms of production, apple cutting propagation is also difficult to produce on a large scale

Moreover, the cutting seedlings and tissue cultured seedlings are very weak, and they need to be cultivated for another year before they can be used as rootstocks for grafting. The whole cycle is too long

Due to these difficulties, there is no large-scale propagation of SH38 and SH40 self-rooted seedlings through these two methods in production. At present, SH38 and SH40 are still used as intermediate stock seedlings in apple cultivation.

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