APPLICATION OF APOMIXIS FOR STUDYING INHE RITANCE OF EVERBEARING HABIT IN GARDEN STRAWBERRY (FRAGARIA X ANANASSA-DUCH)

Expression of everbearing habit was studied in apomictic and amphimict ic seedlings of garden strawberry (Fragaria x ananassa Duch.). The cha racter of segregation for alternative traits (one or several bearing d uring vegetation) was described using a general model of polysomic mon ogenic segregation. It was found that an increased of dose of the R al lele, controlling the everbearing habit, results in domination of this trait. Genotypes of everbearing cultivars (Red Rich, Sakhalinskaya, a nd P1 hybrid) were determined as R(4)r(4), and genotype of cv. Komsomo lka with one bearing per vegetation, as R(3)r(5). It was shown that th e ''type of flower sex'' and ''bearing type'' traits were inherited in dependently. Segregation analysis in both amphimictic and apomictic pr ogenies provides additional opportunities for studying genetic control of important breeding traits in polyploids.