A method for grafting and rapid propagation of tea tree specific germplasm resources

Abstract

The invention discloses a method for grafting and rapid propagation of special germplasm resources of tea trees. According to the method, vicennial cloned Fuding big white tea is utilized as stocks, the stocks and cions are twigs before semi-lignification under specific stock-cion combination, grafting work is carried out from the first ten days of May to the middle ten days of June, the twigs of the stocks and cions are cut and grafted by utilizing shavers, grafting cuts are bundled by utilizing black plastic tapes, the whole cion and stock grafting cuts are wrapped with colorless polypropylene plastic bags, an awning is erected, the best time is selected to relieve bundled and wrapping plastic bags and remove the awning, and timely and batched topping is performed. By comprehensively utilizing the steps, the survival rate of the special germplasm resources of the tea trees is improved by 80% or above, and the propagation expanding progress can be accelerated for at least 2-3 years by comparing cuttage and transplantation.

Description

technical field [0001] The invention belongs to the field of plant breeding, and more specifically relates to a method for grafting and rapid propagation of tea tree specific germplasm resources. Background technique [0002] my country is the birthplace of tea trees, and its germplasm resources are very rich. However, with the development of science and technology and breeding methods, conventional germplasm resources are difficult to meet the needs of breeding diversity and directional goals to a certain extent. Therefore, it is necessary to discover and innovate Specific tea germplasm resources. [0003] Tea tree specific germplasm resources refer to rare germplasm resources with special traits, such as high tea polyphenols, high amino acid, high theanine, low caffeine, albinism and other specific tea tree resources. For the specific tea tree germplasm resources that have been initially excavated, how to speed up the multiplication, speed up resource evaluation, identific...

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Problems solved by technology

[0004] Although the traditional sexual reproduction method of tea tree seeds has a large reproduction coefficient, it takes more than 5 years for tea trees to bloom and set fruit. In addition, the good traits of the offspring of sexual hybrid seeds segregate, variate and degenerate. Therefore, tea tree specific germplasm resources can only maintain good traits through asexual reproduction.

However, conventional cutting asexual reproduction has low survival rate, slow reproduction speed and small reproduction coefficient, especially some rare and specific germplasm resources, such as Guizhou Nayong low-caffeine wild Tufang tea, Xingyi Qishe high-tea polyphenol Dachang tea, etc. It is difficult to rapidly clonal propagation and population expansion by relying on other methods, which seriously hinders the evaluation, excavation and utilization of specific germplasm resources

[0005] Grafting is a kind of asexual high-efficiency rapid propagation technology, which can maintain the excellent characteristics of scion varieties, and can also shorten the propagation period, increase the reproduction coefficient, enhance resistance, improve quality, increase yield, protect ecology and reduce investment, etc. However, now Some grafting methods use lignified rootstocks and scions for grafting. Rootstocks do not retain leaves for photosynthesis, and their vitality is not strong. The plastic straps tied at the joints are not protected from light, which is not conducive to the formation and healing of joint calluses. Do not cover the sunshade net Shading and covering the incision with moist soil have poor moisturizing effects, and the survival rate for multiplying specific germplasm resources is not high. Therefore, developing a method for grafting and rapid propagation of tea tree specific germplasm resources is very useful for tea tree breeding. Practical significance

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