The work on breeding of promising soybean varieties will be more efficient if the information on trait inheritance and degree of their manifestation is taken into consideration and used henceforth. The purpose of presented work was to identify heterosis effect and a degree of phenotypic dominance of F1 hybrids, transgressive variation of economically valuable traits of F2 and F3 hybrid offspring, and to identify promising soybean lines. As a result of the conducted research, phenotypic overdominance of trait inheritance and a high degree of heterosis (more than 51.0 %) in F1 in 54.5 % of combinations by the number and mass of seeds per plant were figured out. The degree and frequency of transgression in F2 and F3 hybrid populations of soybean varied depending on combinations and generations. Promising soybean lines with donor traits were identified: by the number of seeds per plant – NIISKH 4×Typhoon; by the mass of seeds per plant – Typhoon×Arisa, NIISKH 3×Typhoon and NIISKH 3×Arisa; by the number of beans per plant – Primorskaya 96×Kyoto, NIISKH 4×Kyoto and Primorskaya 96×Typhoon. In most cases, the degree of hybrid transgression did not correlate with its frequency, in some combinations and characteristics it was observed that values decreased rapidly in F3 in comparison with F2.

Butovets Ekaterina S., Vasina Evgeniya A., Kukuruza Galina O., Strashnenko Tatiana N., Lukyanchuk Ludmila M.

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