High-efficiency walnut hybridization breeding method

Abstract

The present invention belongs to the technical field of forest tree hybridization breeding and particularly relates to a high-efficiency walnut hybrid hybridization breeding method. Male flowers of male parents and female flowers of female parents and young fruits are nested in transparent paper bags 3-5 days before the male and female flowers are pollinated; connection parts of bag mouths and branches are filled with cotton, and then the bag mouths are tied tightly with strings; when the male flowers spit out pollens, the small bags are untied, tweezers are used to collect anthers without cracking, the anthers are placed in culture dishes and a 100 W bulb is hung 50 cm above the culture dishes for irradiation for 2 hours to obtain the pollens; small openings are cut at upper ends of the transparent paper bags 2-3 days after pistils bloom, and the obtained pollens are sprayed onto stigma of the female flowers using a pollinator; after pollination is completed, paper clips are used to seal the cut off bag mouths; a second pollination is carried out the next day; the paper bags are removed five days after the pollination, and seedlings are cultivated; and harvesting is conducted after hybridization fruits are mature. A pollination preservation rate can reach 95% or more and output of excellent walnut varieties is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of tree hybrid breeding, and in particular relates to a high-efficiency hybrid breeding method for walnuts. Background technique [0002] At present, walnut is a kind of dry fruit with rich nutrition and high economic value. Essential amino acids are beneficial to human health and are widely used in the field of health food therapy. Walnut trees are both economic forests and timber forests. Walnut trees are hard and smooth, and can be used to make high-grade wooden furniture. But the first fruit bearing period of walnut variety is long at present, generally needs 6 to 8 years, and yield is low in addition, so seriously hindered the large-scale cultivation of walnut, and the cross-breeding technology that obtains new walnut variety has not been reported yet. [0003] In summary, the problems in the prior art are: the existing walnut varieties have a long initial fruit-bearing period, low yield, and poor eco...

AI Technical Summary

Problems solved by technology

[0003] In summary, the problems in the prior art are: the initial fruit-bearing period of existing walnut varieties is long, the yield is low, and the economic benefit is poor.

[0004] The difficulty of solving the above-mentioned technical problems: the walnut varieties currently cultivated have a long initial fruit-bearing period and low yield, which seriously hinders the cultivation and planting of walnuts in large areas, and it is urgent to cultivate new walnut varieties

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