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A comparative study was carried out on the parthenogenetic reaction of  Helianthus annuus  L. lines and hybrids used as initial female material for parthenogenetic induction. It was established that the mean parthenogenetic responsiveness of the hybrids was considerably higher than that of the lines. The mean parthenogenetic responsiveness of the lines used as initial female material (2607 A, 2607 B, 1607 A, 1607 B, 1234 A and 1234 B) was lower than the mean responsiveness of the hybrids (Albena, Viki, Euroflor, Perla and San Luka). Within the investigated lines, no specific genotype reaction with regard to parthenogenetic induction was ascertained; such reaction was observed in the hybrids. The hybrids San Luka and Perla had the relatively highest parthenogenetic responsiveness.

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EFFECT OF FEMALE GENOTYPE ON THE EFFICIENCY OF γ-INDUCED PARTHENOGENESIS IN SUNFLOWER (Helianthus annuus L.) / INFLUENCIA DEL GENOTIPO FEMENINO EN LA EFICIENCIA DE PARTENOGÉNESIS γ-INDUCIDA EN GIRASOL (Helianthus annuus L.) / EFFET DU GÉNOTYPE FEMELLE SUR L’EFFICACITÉ DE LA PARTHÉNOGENÈSE PAR INDUCTION-ã DANS LE TOURNESOL (Helianthus annuus L.)