Abstract:

Cotton is a major cash crop in China, which is widely distributed, has a long production cycle and is greatly affected by abiotic stresses. Breeding and screening cotton varieties with strong stress resistance are the main ways to reduce stress disasters, and the study on abiotic stress resistance identification techniques and standards of cotton varieties is crucial. For this purpose, this paper summarized basic methods of crop stress resistance identification at home and abroad in recent years, as well as the identification contents, identification periods, identification methods, identification indicators and stress determination levels of five common and frequent abiotic stresses (ecological stresses) of cotton, such as drought, waterlogging, salinization, high temperature and heat injury, and cold and chilly injury. The paper also summed up basic principles, framework and content for formulating stress identification standards and establishing the standard system. The basic ideas for further research are proposed, mainly including fast, convenient and non-destructive stress resistance identification based on new technologies such as Spectrum/Hyperspectrum, stress resistance identification under complex stresses, and direct location of relevant stress resistance genes by molecular biology for identifying stress resistance.

Key words: cotton, stress resistance, identification technology, standard system, drought resistance, water logging tolerance, salt tolerance, cold injury tolerance, heat injury tolerance