Breeding method for Eucalyptus urophylla*E.grandis clone DH32-43 variety

Abstract

The invention discloses a breeding method for a Eucalyptus urophylla*E.grandis clone DH32-43 variety. Firstly, a female parent U16(Eucalyptusurophylla) and a male parent G46(Eucalyptusgrandis) are taken as parents; and the Eucalyptus urophylla*E.grandis clone DH32-43 variety which is consistent in phenotypic expression, stable in inheritance and does not have segregation of character is obtained after castration and bagging, pollen collection, artificial pollination, removal and bagging, seed collection and sowing, and breeding. The variety is characterized in that the leaf base of nursery stock is slightly wide in a seedling stage, blades are sharp and long, edges are in the shape of microwaves, terminal buds are dark red, veins are clear and do not protrude, and stems of seedlings are longer than other products in a young seedling stage; and the Eucalyptus urophylla*E.grandis clone DH32-43 variety has the characteristics of straight trunk shape, uniform forest form, small branches, no diseases and insect pests, large annual average amount of growing stock and obvious economic benefit, and is suitable for large-area and wide-range promotion and planting.

Description

technical field [0001] The invention relates to the field of plant breeding, in particular to a breeding method for the clone DH32-43 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...

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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

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