Displaying of heterosis in interline sunflower hybrids by breeding valuable traits

The purpose of the work is to study displaying of heterosis effect in sunflower Fi progeny. The researches were conducted in fields of the V.S. Pustovoit All-Russian Research Institute of Oil Crops, Krasnodar, in 2011-2013. We crossed four CMS-lines and four pollen fertility restorer lines, pollination was conducted under the special isolator (so called sleeve). The obtained 13 hybrids and their parental lines were studied by 12 economically valuable traits. We revealed the positive heterosis in all hybrids by such traits as: plant height, inclination and diameter of a head, seed and oil yield. By other traits, there were observed both negative (achene thickness) and positive heterosis (head thickness, achene length, width and thickness, seed amount per a head, 1000 seeds weight and oil content in seeds). We detected a reliably high tme heterosis in all studied sunflower hybrids by seed and oil yield, oil content in seeds -76.9% of all samples comparing to control. Due to results of the competitive heterosis, hybrid exceedance was noted only in 61.5% of hybrids by a trait of seed yield, in 46.2% of hybrids - by oil content in seeds, in 30.8% of hybrids - by oil yield.