A screening method for drought-resistant germplasm

Abstract

The invention discloses a drought-resistance seed sieving method. An agar bed is adopted for sieving. When the method is adopted, the seed sprouting media are very uniform, in addition, the repeated differences are very small and can be ignored, drought-resistance materials can be sieved out from a great number of varieties reaching thousands of parts, the efficiency is high, the repeatability is good, the accuracy is high, the operation is simple, the water dispersion is uniform, and the water supplementation operation is not needed in the sieving process.

Description

technical field [0001] The invention relates to a method for screening drought-resistant germplasm. Background technique [0002] Drought is one of the main environmental factors affecting plant growth and development. Tobacco often encounters drought during the growth process, especially from the cluster stage to the flourishing stage. Drought has become an important factor affecting vegetative growth. The screening of drought-resistant seeds has become one of the effective ways to solve the above problems. [0003] Traditionally, the method of identifying drought resistance is mainly field identification, but the field identification period is long, the repeatability is poor, and it is greatly affected by the cultivation environment. Therefore, it is more convenient and fast to choose identification from seed germination to seedling growth stage. The germination beds of seeds mainly include paper beds, sand beds and soil beds. Paper beds are mainly used for tobacco seeds...

AI Technical Summary

Problems solved by technology

The germination beds of seeds mainly include paper beds, sand beds and soil beds. Paper beds are mainly used for tobacco seeds, because tobacco seeds are very small, and the particles of sand beds and soil beds are relatively large. If sand beds or soil beds are used Tobacco seeds are easy to lose, but the paper bed has disadvantages such as cumbersome operation, difficult control, and low accuracy. If no water is poured during the test, it will easily cause excessive drought, resulting in the death of all samples, and it is difficult to distinguish drought resistance. Sprinkling water can not control the amount, too little effect is not obvious, and too much may not achieve the purpose of the drought test

In addition, whether it is a paper bed, a sand bed or a soil bed, there are defects such as uneven moisture distribution, poor repeatability, and low screening accuracy.

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