how seeds are monitored in the gene bank

In the natural resources gene bank of iran, the seeds of pasture and medicinal plants collected from different parts of the country are stored in the basic (-18 degrees) and active (4 degrees) cold storage after going through the stages of irrigation and measuring the moisture content, purity and determination of power germination. keeping seeds in controlled conditions in terms of temperature and humidity increases their lifespan. but in the same conditions, after a period of 5-10 years, depending on the type of seed, the germination power of the seeds is lost and the deterioration of the seeds occurs. in order to prevent deterioration, it is necessary to remove the seeds from the gene bank every few years (5-10 years) and measure their seed vigour, so that if it is lost, the seeds are in the process of regeneration and after regeneration and production, new seeds replace lost seeds. and in this way, the genetic reserves protection program should continue.