New Sunflower Restorer Lines, Developed by Direct Organogenesis Method from Intergeneric Cross Helianthus annuus (cv. Albena) x Verbisina helianthoides (Genera Verbisina) - Decease Resistance, Combining Ability

J. ENCHEVA, M. CHRISTOV, M. TODOROVA, P. SHINDROVA and V. ENCHEVA
Dobroudja Agricultural Institute, BG-9520 General Toshevo, Bulgaria

Abstract

ENCHEVA, J., M. CHRISTOV, M. TODOROVA, P. SHINDROVA and V. ENCHEVA, 2004. New sunflower restorer lines, developed by direct organogenesis method from intergeneric cross Helianthus annuus (cv. Albena) x Verbisina helianthoides (Genera Verbisina) - decease resistance, combining ability. Bulg. J. Agric. Sci., 10: 417-422

The direct organogenesis method in immature F1 embryos from sunflower was successfully applied for production of new forms from the intergeneric cross Helianthus annuus (cv. Albena) x Verbisina helianthoides (genera Verbisina). The available literature does not provide data on the obtaining of these hybrid combinations. Our results are also the first attempt to investigate the combining ability of the new lines produced through intergeneric hybridization. After repeated selfing and continuous selection, a great diversity of new sunflower lines was developed. Some of the new lines produced possess resistance to important decease and parasite broomrape and very good combining ability. The new hybrids developed showed an increase of the indexes seed yield to 20.5 % and oil yield to 33.0 % in comparison to the mean standard (commercial hybrids Albena and Super start).

Key words: sunflower, Helianthus annuus, Verbisina helianthoides (genera Verbisina), direct organogenesis, decease resistance, combining ability