Micropropagation technique is essentially established nowadays and could overcome the genetic segregation of the plants germinating from seeds; field-selected elite strains could be efficiently propagated with micropropagation techniques. Micropropagation techniques are of three types based on the way of propogation:
first, the propagation from shoots with cytokinin like benzyladenine or kinetin; second, multiple shoot differentiation from dedifferentiating tissue, callus, with an auxin like indole acetic acid; and finally, the embryo differentiation from callus. The former two methods need the rooting process with an auxin like indole acetic acid and with naphthaleneacetic acid thereafter. Nowadays, the method of ropagation from shoots is the most preferred one, because the latter two methods present the possibility of genetic variation owing to the dedifferentiated phase, callus.