You need to dry seeds for its standard moisture and below, then if possible use some fungicide, keep them in a nylon pack, sealed, and freeze-20 C or below. Regards.

There are different ways to conserve the orthodox and recalcitrant type of seeds so first check the storage physiology of your species.

Generally, there are two types of seeds, orthodox or recalcitrant seeds. For the orthodox seeds, we can dry seeds for its standard moisture and below (based on the dehydration resistance of seeds), and then put them in a low-temperature environment (-4℃ or below). For example, drying the moisture content to below 13% and placing in -4℃ for three years, the rice seeds maintain a germination rate of over 60%. To conserve the recalcitrant seeds, we should put the seeds in suitable temperature and humidity, as they are generally not resistant to low temperatures and dehydration. For example, the wood pineapple seeds should be partially dehydrated to make the seed coat tend to air dry, then placed in a plastic bag that can be moderately ventilated and stored at 15 ℃, even after 460 days, the germination rate remains at 90%.

@Medhat Alsahookie @Rajveer Singh Chauhan and @Wuxian Zhou Thank you for you time and your answer

I am working with wheat seeds?

For wheat seeds, just keep the moisture content under 13% and store them under -4 ℃. Under these conditions, the seeds can be preserved for at least 10 years