Method for cultivating new variety of purple-coat walnuts

Abstract

The invention relates to a method for cultivating a new variety of purple-coat walnuts. The method comprises the following steps of selecting wild adult walnut trees, marking branches with strong dryness, pinnately compound leaves, 7-13 leaflets, oval leaf shapes and the leaflet length-width ratio of 1.82:1, or / and preliminarily marking branches with obvious fruit marks and strong dryness after leaves fall in the current year; in the marked branches, marking the branches which bear large fruits and have the fresh fruit weight of 20-25g / fruit, the faint-purple fresh fruit pulp skin color and the dark-purple dried fruit pulp skin color in the current year for the second time, performing continuous observation and detection for three years, and determining the branches with continuous and obvious fruit marks, large fruits, the faint-purple fresh fruit flesh skin and the dark-purple dried fruit flesh skin as target bud mutation branches; and performing grafting survival on the target bud mutation branches with non-plant walnut trees as rootstocks, and enabling the branches to grow to the new variety of purple-coat walnuts. The new walnut variety is selected for artificial grafting through the biological characteristics of natural bud mutation, the population number is increased, and the walnut variety is enriched.

Description

technical field [0001] The invention relates to the breeding of a new walnut variety, in particular to a breeding method for a new purple walnut variety. The trade name of purple-coated walnut is Axi purple-coated walnut. Background technique [0002] According to relevant literature records: Walnut has another name called Juglans, Qiang peach, is the most extensive a kind of tree species of cultivation both at home and abroad. Deciduous trees, generally 10-20 meters high, up to 30 meters tall, with a trunk diameter of about 1 meter, and a life span of one to two hundred years, the longest being more than 500 years. The crown is large and open, in the shape of a semicircle or a round head, with a diameter of 6-9 meters. Bark grayish white to dark brown, young trees with smooth bark, old trees with irregular shallow longitudinal fissures. The branches are thick and smooth, and the shoots are green when they are first born, and can also be slightly red in early spring, and ...

AI Technical Summary

Problems solved by technology

But people do not have this technology at present, and some are only natural varieties, and most of them use seeds to breed to expand the population and increase walnut production.

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