Method for cultivating bolting-resistant cabbage varieties

A breeding method and bolting-resistant technology, applied in the field of breeding, can solve problems such as backward genetic improvement methods of parents, low efficiency of replacement of cabbage crop varieties, poor market competitiveness, etc., and achieve the effect of improving breeding efficiency

Active Publication Date: 2019-01-18
NORTHEAST AGRICULTURAL UNIVERSITY
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Problems solved by technology

[0003] Although a batch of cabbage varieties promoted in production today have shown certain advantages in terms of high yield, multi-resistance, and ripeness, they still cannot compete with foreign varieties in terms of quality and commerciality, especially because we currently lack our own cabbage varieties. The leading product

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  • Method for cultivating bolting-resistant cabbage varieties
  • Method for cultivating bolting-resistant cabbage varieties
  • Method for cultivating bolting-resistant cabbage varieties

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Embodiment 1

[0024] Parental materials are trained and reserved from foreign varieties: sow in early February, transplant in early March, and plant in plastic greenhouses in mid-to-early April, with a density of 40×50cm, normal fertilizer and water management, timely inter-cultivation, and early management attention to increase ground temperature. Attention should be paid to lowering the temperature in later management, the ground temperature should not be lower than 8°C, and the greenhouse temperature should not exceed 28°C. 50-55 days after planting, the investigation of horticultural traits was started, and the mother plants were successively harvested according to the standard after the investigation. Seed plants are dried in the sun for 3-5 days, placed in a low-temperature freezer at 4°C, and pre-cooled for vernalization for 60-80 days. The mother plant is planted in the flower pot in mid-August, bolting and blooming in mid-September, and the seeds are harvested 60-80 days after poll...

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Abstract

The invention relates to a method for cultivating bolting-resistant cabbage varieties. The method comprises the following steps: combining inbred line breeding conditions suitable for a bolting environment under ecological conditions of northern cold regions, respectively taking Japanese varieties and European varieties as parent sources, and screening to obtain two groups of inbred lines with advantages of being early-maturing, cold-resistant and resistant to premature bolting as parents; identifying horticultural characteristics of the two groups of parents, configuring combinations of the two groups of parents, setting all the combinations as reciprocal cross, performing grey relational degree evaluation by a grey system theory, taking a combination with the highest grey relational degree as a selected combination, cultivating a self-incompatible line corresponding to parents involved by the selected combination, configuring the selected combination, and inspecting phenotypic expression of the combination, thereby obtaining the bolting-resistant cabbage varieties. The method disclosed by the invention has the advantages that two parents having a long genetic distance serve as the parent source, high-pressure screening is performed under the ecological conditions of northern cold regions, and the bolting-resistant cabbage varieties are objectively and effectively bred by utilizing grey evaluation.

Description

technical field [0001] The invention relates to breeding technology, in particular to a method for cultivating bolting-resistant cabbage varieties. Background technique [0002] Cabbage is a worldwide vegetable, which is cultivated in large areas in the north and south of my country. The growth and development characteristics of this vegetable crop determine that it has a special role in the annual production and balanced supply of vegetables. The vast Three-North region is one of the most suitable areas for growing cabbage in China. In addition to the adjustment of agricultural planting structure, it is necessary to give priority to the development of characteristic economic crops such as cabbage. Many factors such as "transporting vegetables from the north to the south" and "exporting to Russia" determine The prospect of developing this vegetable crop in northern my country is very broad. [0003] Although a batch of cabbage varieties promoted in production today have sho...

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Application Information

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IPC IPC(8): A01H1/02A01G22/15
CPCA01H1/02A01G22/15
Inventor 张晓烜王超许蕊仙张淑波
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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