Influence of some elements of agricultural techniques on sun-flower hybrids seed yield and sowing qualities

Increasing of sowing areas under sunflower hybrids in the Western Siberia requires not only to start up a complete breeding program here, but to adapt the entire system of hybrid seed production to local conditions. The main aim of our work was to develop the most effective methods for hybrid seed production in local conditions, ensuring conditional seeds with high genetic purity, high yield and sowing qualities. It is shown, that the optimal plant population is 60 000 plants per ha for parental forms of sunflower hybrids Avangard and Aurora, with the ratio two rows of paternal line to 14 rows of maternal form. The best planting date was 20th of May for parental forms of Avangard and Aurora. Desiccation by reglon super is recommended in dose 2 l ha-1.