Method for identifying heat resistance of Chinese cabbage germplasm

Abstract

The invention discloses a method for identifying the heat resistance of cabbage germplasm. The cabbage germplasm to be identified is sown in a facility in August, and the temperature of the cabbage germplasm is identified under the temperature condition of ≥ 35°C in the facility in October. Heat resistance, after eliminating the cabbage germplasm that does not meet the requirements for heat resistance, keep the germplasm of cabbage that meets the requirements for heat resistance, and directly pair the parents after flowering in the second spring. The identification method of the cabbage heat-resistant germplasm of the present invention, its core is to use the high-temperature microclimate formed by the facility in autumn to replace the summer high temperature in the traditional method for heat-resistant screening, which has the advantage of shortening the screening period by 5-6 months, At the same time, the errors caused by strain differences, mechanical mixing, and annual climate differences in the cabbage germplasm are reduced, the accuracy of identification is improved, and the amount of seeds used can be reduced.

Description

technical field [0001] The invention relates to the technical field of crop breeding, in particular to a method for identifying heat resistance of cabbage germplasm. Background technique [0002] Cabbage is an important vegetable crop widely cultivated in my country, and plays an important role in the annual supply of vegetables. High temperature is the most common adversity factor in vegetable production. Because Chinese cabbage likes cold and cool climates, it is not resistant to high temperature, so high temperature adversity in summer and autumn often becomes a restrictive factor for Chinese cabbage production. Breeding heat-resistant Chinese cabbage varieties is one of the main methods to solve this problem. one. [0003] In the process of breeding heat-resistant cabbage, it is often necessary to identify the heat resistance of breeding materials. The general method is to divide the germplasm of Chinese cabbage to be identified into two parts, and first sow one part o...

AI Technical Summary

Problems solved by technology

With this method, on the one hand, it takes two natural years to complete the identification of heat resistance, which prolongs the breeding cycle; on the other hand, due to climate differences between different years, mechanical mixing and other reasons, the identification results are often not accurate enough

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