Breeding method for clonal variety DH32-29 of Eucalyptus urophydis

Abstract

The invention discloses a breeding method for the clonal variety DH32-29 of Eucalyptus urophydis. The method comprises the following steps: using Eucalyptus urophylla U16 as a female parent and Eucalyptus grandis G46 as a male parent; and then carrying out emasculation and bagging, pollen collection, artificial pollination, removal of bags, seed collection and sowing, and breeding so as to obtain the clonal variety DH32-29 of Eucalyptus urophydis with the characteristics of consistent trait expression, stable inheritance and trait segregation exemption. The variety is characterized in that the seedling of the variety has small, pointed and long leaves, green terminal buds, inconspicuous leaf veins, red-like seedling stems and coarse barks at the lower end of the trunk in a seedling stage; the variety has the characteristics of straight trunk form, neat forest form, small branches, capabilities of preventing diseases and pests, great annual stand volume, obvious economic benefits and applicability to large-area plantation.

Description

technical field [0001] The invention relates to the field of plant breeding, in particular to a breeding method for the clone DH32-29 variety of Eucalyptus urophylla. Background technique [0002] eucalyptus( Eucalyptus ), also known as eucalyptus, originated in Australia and was introduced into my country in 1890. Guangxi has developed eucalyptus planting for more than 100 years. After the 1980s, a large number of eucalyptus species and provenances were introduced and nearly A large number of scientific and technological achievements have been obtained through hundreds of researches; at the same time, eucalyptus has brought rich economic benefits. According to statistics, 15 achievements such as the introduction and improvement of eucalyptus in Dongmen and the research on high-yield cultivation technology have won the State Forestry Department and the Autonomous Region Progress Award. The economic benefits amounted to more than 10 billion yuan. The planting area of ​​eucaly...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many eucalyptus species in my country, such as Eucalyptus urophylla, Eucalyptus grandis, Eucalyptus blue, Eucalyptus durnen, Eucalyptus durn, etc., which can produce a variety of industrial woods; China has entered an ecological society, and the sustainable development strategy has become more and more popular in the world. The more countries and the public pay attention to and recognize it, the sustainable development strategy of my country's forestry is also guiding the development of modern forestry in countries around the world. However, due to the influence of eucalyptus species, although many species of eucalyptus in my country have strong growth ability, due to the short felling cycle, Immediate eucalyptus has strong regeneration ability. Due to successive years of felling and planting rotation, many eucalyptus planting areas have insufficient greening and serious soil erosion