Abstract:

Oil sunflower is one of the important oil crops in the northern region. At present, the scope of saline-alkali hazards is gradually expanding, which has become an important bottleneck restricting the development of oil sunflower. In order to carry out the identification and utilization of saline-alkali tolerant germplasm resources in saline-alkali areas, cultivating high-quality saline-alkali tolerant sunflower varieties is one of the important measures to improve the planting efficiency of saline-alkali crops and the sustainable development of agriculture. In this paper, the physiological mechanism of oil sunflower in response to saline-alkali stress was summarized, the molecular mechanism of oil sunflower response to saline-alkali stress, the identification of salt-tolerant germplasm resources of oil sunflower and the screening of excellent resources were reviewed. The latest research status of salt-tolerant variety breeding and germplasm resources innovation of oil sunflower were summarized. The study put forward new research ideas and methods for the innovative utilization of salt-tolerant germplasm resources and breeding of new varieties in the future. One was to determine the salinity tolerance level by identifying germplasm materials; the second was to further study the stress resistance mechanism of the collected and screened germplasm materials. At the same time, it also provided a theoretical basis for the breeding of salt-tolerant varieties of oil sunflower.

Key words: oil sunflower, salt and alkali resistance, germplasm resources, identification, breeding