Final answer:
Germplasm of vegetatively propagated crops is normally stored and distributed to users in tissue culture, a method that involves sterilizing plant material and propagating a large number of plants from a single plant under laboratory conditions.
Step-by-step explanation:
Germplasm of vegetatively propagated crops is normally stored and distributed to users in tissue culture. Tissue culture, also known as plant tissue culture or micropropagation, is a method of propagating a large number of plants from a single plant in a short time under laboratory conditions. It involves sterilizing plant material and placing it on a plant tissue culture medium where it develops into callus and eventually individual plantlets. These plantlets are then grown under greenhouse conditions before being moved to field conditions.