A method for screening salt-tolerant cotton varieties

Abstract

The invention provides a method for screening salt-resistant cotton varieties. According to the method, different varieties of cotton seeds are subjected to concentrated sulfuric acid depilation; then, after constant-temperature drying, healthy seeds with uniform and consistent size and plumpness are selected. After sterilization, the seeds are divided into a salt treatment group and a blank control group for seed soaking and pregermination; after the seed soaking for a period of time, seeds with multiparticle growing point cracking and identical bud length are selected from each variety; the seeds are transplanted to a salt treatment aeroponic cultivation turnover box and a blank control aeroponic cultivation turnover box for culture according to the salt treatment group and the blank control group; after the culture completion, the bud length of sprouted cotton seeds in the salt treatment group and the blank control group is respectively determined; the salt-resistant cotton varieties can be screened out through analytical contrast on bud length data of cotton seeds. The method has the advantages that the cost is low; the operation is easy; the method can be conveniently popularized and implemented in each place.

Description

technical field [0001] The invention relates to a method for screening cotton varieties, in particular to a method for screening salt-tolerant cotton varieties. Background technique [0002] Cotton, as the main economic crop in our country, occupies a pivotal position in the development of the national economy. Due to the serious contradiction between grain and cotton land competition, the production of cotton was seriously affected. Cotton can be used as a pioneer crop to develop the economy in saline-alkaline areas because of its salt-alkali tolerance. The evaluation and selection of salt-tolerant germplasm is the premise of salt-tolerant breeding. Most of the current cotton salt-tolerant identification methods have a large workload, high cost, and are limited by the growing season. [0003] For a long time, the screening or identification of saline-alkali-tolerant cotton has been carried out in field saline-alkali land and artificial salt ponds, or some physiological an...

AI Technical Summary

Problems solved by technology

In actual operation, the defect of this method is that some healthy seeds with plump and uniform appearance have good bud emergence, but the elongation of hypocotyls in the later stage is not ideal. In production practice, such seeds will be damaged under salt stress The buds are white, but the hypocotyl does not elongate and cannot break through the soil

[0005] Therefore, there is a lack of a method for screening salt-tolerant cotton varieties that is easy to control the cultivation environment, easy to operate and has high accuracy.