New soybean cultivars selected in mendeleum for the region of southern Moravia

摘要

The process of selection of new cultivars was started in 1975 by formatting a collection of genotypes from Europe and overseas. This process still continues. First collections have been undergoing an intensive and complex evaluation from the point ofview utility features, health conditions, reproductive ability in different regions etc. In 1980-1990 onto the best of them a radioselection had been applied (Gammacell 220, X-rays up to 40 kR, radiomimetics EMS up to 0.25% and MNU up to 1.5 mM with expositions 6, 12, and 24 hours). At the same time, in 1980, a crossing of distinct genotypes was started. According to the increase of efficiency of hybridization the volume of radioselection has been decreasing.