EN
Considerable increasing number of plant varieties on domestic seed market at lower production and selling of planting material in years 1989-2001 was observed; thus the exchange of cereal seeds could have place every 14 years and seed potato every 35 years only. Unachieved varietal potential increased from 33,0-51,0% in years 1986-1996 to 48,9-60,9% in years 2000-2002, owing to increased yields in the experiments at simultaneously reduced yields in farm production. The situation seems to be dangerous for the future of plant breeding and needs the rationalization of plant breeding, establishing of effective seed system and reconstruction of public varietal advisory.