CALLUS INDUCTION AND PLANT REGENERATION FROM BARLEY MATURE EMBRYOS (HORDEM VULGARE L.)

ABSTRACT Immature and mature embryos of four Bulgarian winter and spring barley (Hordem vulgare L.) (72.2% and 97.8%, respectively) and the highest number of regenerated plants per embryo (9.3 and 13.3, respectively). A comparison of the responses of the two types of explants indicated that the mature embryos were more useful explants for plant regeneration, and therefore, being available throughout the year, can be used as an effective explant source in barley studies