Method for selecting and cultivating Populus diversifolia-Populus pruinosa hybrid new product obtained by natural hybridization variation of Populus diversifolia and Populus pruinosa

Abstract

The invention provides a method for selecting and cultivating a Populus diversifolia-Populus pruinosa hybrid new product obtained by natural hybridization variation of Populus diversifolia and Populus pruinosa. The method comprises the following steps: (1) selecting and cultivating rootstock seedlings, wherein Populus diversifolia seed bearer with good genes is used as the source of rootstock, the seed of Populus diversifolia seed bearer is soaked and then sowed, the obtained seedlings are transferred for bed cultivation for one year, and in summer at third year, the seedlings having vigorous growth are used as rootstock seedlings; (2) screening and treatment of scions, wherein the excellent Populus diversifolia-Populus pruinosa hybrid new product is selected in a mixed growth area of Populus diversifolia and Populus pruinosa as a seed tree, the seed tree is cut with stump being leaved, the sprouting branches are cultivated and vigorous branches are used as scions; (3) grafting; (4) management; and (5) secondary grafting. The invention discloses a method for selecting and cultivating the Populus diversifolia-Populus pruinosa hybrid new product obtained by natural hybridization variation of Populus diversifolia and Populus pruinosa, compared with the parent trees, the Populus diversifolia-Populus pruinosa hybrid new product selected by grafting is more excellent in drought resistance, cold resistance, wood stem form and wind resistance, the salt tolerance reaches 1-2%, the time of the selecting and cultivating is greatly shortened.

Description

technical field [0001] The invention belongs to the field of agricultural biotechnology, and in particular relates to a method for breeding new varieties of populus euphratica, a natural hybrid variant of poplar euphratica and poplar cinerea. Background technique [0002] Populus euphratica and Populus gray are very precious woody plant stress-resistant germplasm resources. They are listed as endangered third-level protected plants by the country. They have strong drought resistance, salt-alkali tolerance, wind resistance, and sand-fixing capabilities. They are natural resources in the Tarim River Basin. Constructive species and dominant species of vegetation play a vital role in the ecological balance of the Tarim River Basin. Due to man-made destruction and problems in the reproduction of Populus euphratica and Populus ash, the Populus euphratica and Populus ash have declined sharply, and the Populus euphratica forest has shrunk by half in the last 40 years alone. It is e...

AI Technical Summary

Problems solved by technology

With conventional breeding methods, it takes a long time for forest tree species to grow from seeds, seedlings, high growth to fruiting, and to become useful. As a result, the selection of forest tree species consumes a lot of manpower and material resources, and at the same time, the investment in breeding is large and the risk is high.