Method for accelerating generation adding of brassica campestrisssp.chinensis makino

Abstract

The invention discloses a method for accelerating generation adding of brassica campestrisssp.chinensis makino. The method comprises the following steps that after seed germination, seeds are vernalized at 2-4 DEG C for 15-25 days, then seedlings are transplanted into a greenhouse to be subjected to all-day illumination cultivation under full-spectrum LED lamp tubes, after plants produce buds, theplant type is controlled by removing peripheral old leaves and rosette leaves, after main stalks blossom, mature flower buds at the outermost periphery of the inflorescence are pollinated, seed coatsof immature seeds after pollination are peeled to break the dormancy, and after sowing, brassica campestrisssp.chinensis makino enters the next generation. By means of the method, the breeding progress of the new variety of brassica campestrisssp.chinensis makino can be greatly accelerated, and it is achieved that brassica campestrisssp.chinensis makino has at least four breeding generations every year.

Description

technical field [0001] The invention belongs to the field of crop breeding, and in particular relates to a new method for realizing fast generation of non-heading Chinese cabbage in a greenhouse. Background technique [0002] Non-heading cabbage is a biennial cruciferous vegetable, which can only reproduce one generation a year under natural conditions. It generally takes 6-8 years to develop an inbred line in the breeding process, and even longer to develop a hybrid. In order to improve the breeding efficiency of non-heading Chinese cabbage, it is urgent to shorten its growth cycle and explore the method of fast generation. The predecessors have tried off-site shuttle breeding, winter greenhouse seed collection and tissue culture to propagate non-heading Chinese cabbage materials, but these methods can only reach the reproductive efficiency of 1.5-2 generations a year. The reason is that non-heading cabbage has a long growth period, and the vegetative growth stage needs t...

AI Technical Summary

Problems solved by technology

Previous attempts have been made to propagate non-heading cabbage materials by means of off-site shuttle breeding, winter greenhouse seed collection, and tissue culture, but these methods can only achieve a reproductive efficiency of 1.5-2 generations a year

The reason is that non-heading cabbage has a long growth period, and the vegetative growth stage needs to feel the influence of vernalization. In the later stage, it needs to sense higher temperature and long sunshine to bloom normally, and even mature seeds have a strong dormancy phenomenon. , so the superposition of these factors affects the improvement of the reproductive efficiency of non-heading Chinese cabbage

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