In long-term ex situ conservation of plant germplasm in genetic banks, the main task is to pre-serve the viability of the seeds, since as a result of aging the seeds gradually lose their germination capacity and genetic homogeneity [6]. Therefore, the study of the storage potential (SP) of seeds is a very important step for ex situ conservation of plant genetic resources, especially during long-term storage of collection accessions in a plant genetic bank. In recent years, the determination of this potential has been practiced in many plant genetic banks in different countries [2, 4]. In order to study the storage potential, which indicates the longevity of collection samples during storage, the method of accelerated aging (AA) of seeds is of great interest, the essence of which consists in the artificial acceleration of aging by exposing seeds for a short time at elevated temperature and high relative humidity [1]. There are a number of studies that compared the physiological and biochemical changes in seeds during accelerated aging and long-term storage. Accelerated seed aging allows evaluating the differences between varieties of different types of crops. With the help of the test, it is possible to monitor gene pool samples, i.e. to conduct a permanent record of seed viability and classify genotypes from working and active collections according to the parameters of AA. The test allows to: 1. Identify samples that are not suitable for long-term storage. 2. Give recommendations on the timing of seed reproduction. 3. Indicate the need to restore the viability of valuable collection samples. The aim of the research was to study the storage potential of to-mato collection samples according to various morphophysiological and biochemical parameters of seeds and seedlings after applying tests for accelerated aging of seeds and electrolyte leakage and to gradate genotypes for this complex trait before ex situ conservation.