Method for cultivating bolting-resistant cabbage varieties

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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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 has poor competitiveness in the international market. The real reason is that there are few excellent breeding materials for cabbage, the genetic improvement methods of the parents are backward, and the breeding methods still use old technologies such as self-separation, purification, and hybridization. Low replacement efficiency

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