The efficiency of a simple recurrent selection in breeding of sunflower inbreds

The purpose of this work is to develop sunflower hybrid populations for breeding of lines-maintainers which will differ with high yield and oil content of seeds. The work was conducted at FGBNU VNIIMK (Krasnodar) in 2009-2013. The objects of the research were 19 lines-maintainers of VNIIMK’s breeding and six sunflower hybrids of foreign origin. Lines’ crosses was done using a method of chemical castration by spraying plant with 0.005% water solution of gibberellic acid at bud stage. Next F 1 hybrids were open-pollinated to get the hybrid population F 2 (initial hybrid synthetic) which was used for selection of the best genotypes. As a breeding trait was used yield of seeds, as a secondary one was used oil content of seeds, as a correcting trait - the date of flowering beginning. An improved sunflower synthetic with higher indexes of productivity, quantity and yield of seeds per a plant was developed as a result of two cycles of a recurrent selection on phenotype using the secondary and correcting traits. Similarly a highly productive improved synthetic was developed at first cycle of a selection in other breeding material. The control synthetics, developed after a simple periodic selection without accounting the secondary and correcting traits, had the same level of productivity and seed yield as the initial hybrid synthetic.