Method for screening drought-resistant corn germplasm

Abstract

The invention relates to a method for screening a drought-resistant corn germplasm and belongs to the field of crop genetics and breeding. The method for screening the drought-resistant corn germplasm includes the following steps that 1, sowing corn seeds with the corn germplasm, 2, conducting final singling of seedlings of corn plants, 3, treating the corn plants with drought stress, 4, detecting corn germplasm plant morphological indexes, 5, detecting corn germplasm yield indexes, 6, evaluating the drought resistance ability of the corn germplasm and 7, selecting the corn germplasm with the drought resistance. The method for screening the drought-resistant corn germplasm uses the corn germplasm as a detection object, the drought stress treatment is conducted in the whole growth period, by detecting the plant morphological indexes and the yield indexes, the purpose of building an objective and accurate method for screening the drought-resistant corn germplasm is achieved, and therefore a reliable basis is provided for drought-resistant corn germplasm screening.

Description

technical field [0001] The invention is a method for screening drought-resistant germplasm of maize. Background technique [0002] The area of ​​arid and semi-arid land in my country accounts for about 47% of the total area of ​​the country. Drought has always been one of the main disasters affecting crop production, and the droughts that occur in different degrees every year have caused huge losses to our country's economy, especially agricultural production. Statistics show that from 1950 to the present, the average annual drought-affected area across the country has reached 22 million hectares, 9 million hectares have been severely damaged, and more than 10 billion kilograms of grain have been directly reduced due to drought, accounting for about 60% of the grain loss caused by various natural disasters. In recent years, the area and total output of corn have grown rapidly, and it has become the largest food crop in my country. The planting area is about 37 million hect...

AI Technical Summary

Problems solved by technology

At present, there are few researches on the screening and identification methods of maize germplasm drought resistance at home and abroad. The specific methods used mainly include indoor germination identification method, pot plant identification method, etc., and most of the indicators used are physiological indicators. The hazards involved in the various stages of corn growth and development, and finally manifested in the decline of yield, the pros and cons of various indicators in the identification method should be based on the yield

At present, there is no ideal method for identifying and screening the drought resistance of maize germplasm. Therefore, it is urgent to strengthen research in this area.

Images