An effective diploidization was observed for genotypes (905 × ‘Sono’)F1, (405 × ‘Luba’)F1
and (405 × ‘Sono’)F1 and reached the 25-27%. As for regenerants (905 × ‘Mino’)F1,one diploid plant was received only. The regenerants that remained haploid underwent micropropagation. For genotype (905 × ‘Sono’)F1 4 haploids produced 19 microcuttings. For 905 × ‘Mino’)F13 haploids provided 16 plants and for genotype (405 × ‘Luba’)F110 haploids produced 22 plants, whereas in case of genotype (405 × ‘Sono’)F1 from 6 haploids 16 plants were regenerated.