A method for creating late bolting Yutian Baojian cabbage and its application

Abstract

The invention relates to a method for producing late-bolting Yutian Baojian Chinese cabbage and its application. The method comprises: hybridizing Yutian Baojian Chinese cabbage and late bolting Chinese cabbage that are easily induced to start embryonic development to generate embryoid bodies to obtain an F1 generation; performing free microspore culture on the F1 generation to obtain regenerated plants; After domestication and vernalization, a single plant was selected for self-pollination and multiplication, and the DH line of Chinese cabbage with both bolting resistance and Yutian Baojian head type was obtained through field identification and screening. The present invention creates late bolting Yutian Baojian Chinese cabbage resources that can be planted in spring and applies them to breeding, which can shorten the period of creating stable and late bolting Yutian Baojian homozygous parent resources to 2 years, making Yutian Baojian The sharp-type Chinese cabbage can be planted in spring to meet the annual planting supply demand and promote the development of my country's local characteristic Chinese cabbage in the spring planting market, which is of great significance for enriching the variety types of spring Chinese cabbage.

Description

technical field [0001] The invention relates to the technical field of plant breeding, in particular to a method for producing late-bolting Yutian Baojian cabbage and its application. Background technique [0002] Chinese cabbage (Brassica rapa L.ssp.pekinensis) is a Brassicaceae crop with a long history of cultivation and rich germplasm resources. It is one of the vegetable crops with the largest planting area and the widest distribution in vegetable cultivation in my country. The traditional planting of Chinese cabbage generally follows the beginning of autumn for sowing, and the beginning of winter for chopping. In northern regions, it can be stored until the next spring. If planted in spring, the seedlings will easily lose their commerciality through vernalization under continuous low temperature, resulting in bolting and flowering. With the improvement of late-bolting Chinese cabbage breeding in Japan and South Korea, late-bolting Chinese cabbage varieties that can be ...

AI Technical Summary

Problems solved by technology

However, due to the traditional cultivation mode in my country, there is no resource reserve for breeding late-bolting Chinese cabbage in spring.

[0003] Current studies believe that the late bolting of Chinese cabbage is a quantitative trait controlled by multiple genes, the easy bolting gene is partially dominant, and the late bolting is recessive. Therefore, to screen late bolting Chinese cabbage resources, use traditional hybridization isolation, backcross screening, and then purify It needs at least 7-8 years to be stable, which has led to the current lack of late-bolting Chinese cabbage resources and a single type. In recent years, late-bolting Chinese cabbage of the embracing type in South Korea and Japan has occupied the main market of domestic spring cabbage.

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