Breeding method for multipurpose purplish-red-leaf ornamental cabbage-type rape

Abstract

The invention belongs to the technical field of rape breeding and discloses a breeding method for multipurpose purplish-red-leaf ornamental cabbage-type rape. The method comprises the steps that witha red-leaf mustard leaf-type rape (P1) as a mother sample, with natural cabbage-type rape (P2) with advanced blooming or different flower colors as a male sample, interspecific hybridization is conducted, and a purple tetraploid distant hybrid is obtained; through interlacing planting of the tetraploid hybrid and cabbage-type rape (P3) with good characters, seeds are harvested on the tetraploid hybrid, after sowing, purple-leaf plants are screened in the seedling period, and the single plant with advanced blooming or other flower colors is screened in the blooming period; through continuous backcross for 3-4 generations, selfing is conducted, finally, the purple-leaf character or advanced blooming character or other flower colors are guided to the cabbage-type rape, and the multipurpose purplish-red-leaf ornamental cabbage-type rape is obtained. Compared with the prior art, the method is quicker and easier to implement, the workload is lower, and the ornamental cabbage-type rape whichhas genetic stability and is used for polymerization with purplish red leaves into different flower colors or blooms in advance is more easily obtained.

Description

technical field [0001] The invention belongs to the technical field of rapeseed breeding, and in particular relates to a method for breeding purple-red-leaf sightseeing multipurpose cabbage-type rapeseed. Background technique [0002] At present, the commonly used prior art in the industry is as follows: rapeseed is one of the main oil crops in the world, and it is also an important edible oil source, protein feed, industrial raw material and nectar source plant. my country is one of the first countries to cultivate rapeseed, but in the past it was mainly the cultivation of cabbage-type rapeseed. In the 1930s, Brassica napus (AACC) began to be introduced and cultivated from North Korea, Japan and the United Kingdom. Cabbage-type rape has become one of the most important oil crops in my country. With the improvement of people's material living standards, the continuous deepening of rapeseed breeding research and the needs of agricultural industrial structure adjustment, peop...

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Problems solved by technology

[0004] (1) Brassica napus, which is currently cultivated in a large area in my country, was first introduced from abroad, and the introduction time was short, and the resources within the species were very limited. Low

[0005] (2) In the prior art, due to the poor hybrid compatibility between cabbage (CC) and Chinese cabbage (AA), cabbage (CC) and Brassica napus (AACC), the immature embryos of hybrid offspring develop abnormally, and need to be rescued by immature embryos ( tissue culture) to obtain hybrid offspring; interspecific hybrids obtained from cabbage (CC) and Chinese cabbage (AA), cabbage (CC) and Brassica napus (AACC), Chinese cabbage (AA) and Brassica napus (AACC) (respectively AC, AAC, ACC) have low self-crossing or backcrossing fertility, and it is difficult to obtain self-crossing and hybrid seeds, so a large amount of self-crossing or hybridization is required, which greatly increases the difficulty of directional breeding for hybrid offspring

[0006] (3) The existing purple cabbage and purple cabbage are mostly used for vegetables, and the introduction of the purple gene into Brassica napus also introduces some unfavorable genes of cabbage and Chinese cabbage, so that some traits of purple cabbage tend to be used for vegetables, For example, there are many defects such as hypertrophy of leaves, low degree of fibrosis of plant stems, high content of erucic acid and glucosinolate in grains, and low oil content. It is difficult to select materials with excellent properties suitable for oil use for production.

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