Method for improving artificial hybridization of willow cut twigs

Abstract

The invention provides a method for improving artificial hybridization of willow cut twigs. The method comprises the following steps: 1, bud twig collection and treatment, wherein an excellent single plant which grows robust and is free of plant diseases and insect pests and at the prime age is selected as a parent, and before buds begin to expand at the beginning of February, the twigs provided with buds are cut from the middle or upper portion of the crown in a selected mother tree, the diameter of each twig ranges from 1 cm to 2.5 cm, and the length of each twig is 1m; (2) after the twig is picked, conducting water planting on the male bud twigs in a greenhouse; placing the female bud twigs in shade for water planting, wherein the indoor temperature ranges from 8 DEG C to 11 DEG C, and the relative humidity ranges from 40% to 50%; three to five days later, moving the female bud twigs into the greenhouse for water planting together with the male bud twigs. According to the method, a soil culture method is adopted after the cut twigs are subjected to water planting and induced to root, the twigs are moved into flowerpots containing nutrient soil after root primordia emerge through water planting, for the bud twigs which are subjected to soil culture and root, a small amount of water is only supplied to the flowerpots when necessary, work such as pruning, cleaning and water exchange in the water planting process can be reduced, and labor and time are saved.

Description

technical field [0001] The invention relates to a method for improving artificial hybridization of cut willow branches. Background technique [0002] Cutting branch hydroponic artificial hybridization is one of the important and effective breeding methods to obtain new willow varieties, and it is also a method commonly used in indoor hybridization at home and abroad. In hydroponics, the base of cut branches is hypoxic and susceptible to microbial infection, resulting in discoloration or even rot. Clean the mucus and trim the base, and change the water for the flowering branches frequently. Simultaneously, the nutrients required for the development of the seeds come entirely from the nutrients stored in the cut branches, and a large number of fruit ears on the flowering branches must be thinned out to ensure that a small amount of seeds can develop. In hydroponic hybridization, there are ears that are easy to fall off. Even if the seeds are obtained, the amount is small and...

AI Technical Summary

Problems solved by technology

In order to solve the problems in hybridization such as strict conditions in the hydroponic experiment of cutting branches, troublesome management, few fruit seeds and poor quality, the soil culture method after cutting branches hydroponics to induce rooting is adopted, that is, the root primordium appears in the lower part of the hydroponic female flower branches (white protrusions), planted in flower pots with nutrient soil to continue cultivating, and then carry out conventional artificial hybridization methods such as pollination