Inheritance of a trait seed weight per a plant in the interline sunflower hybrids

The purpose of the research is to study inheritance of a trait seed weight per a plant in interline sunflower CMS-hybrids. The tests were conducted on fields of All-Russia Research Institute of Oil Crops by Pustovoit V.S., Krasnodar, Russia, in 2012-2014. In 2012, two modern maternal forms (a line VА 93 А, seeds weight per a plant is 25.5 g, and a simple CMS-hybrid Kubansky 93 А with higher weight - 50.7 g) were pollinated under the special isolator (so called sleeve) with a pollen of each from ten lines-pollinators which are characterized with high or middle combining ability of seeds yield. The received 20 samples of hybrids and their parental components were estimated on a trait seed weight per a plant in 2013-2014. The data of research allowed stating that epistasis is absent in inheritance of a trait seed weight per a plant (non-allelic interrelation of gens). The main role in genetic control of this trait belongs to additive interrelation of genes and a little dominance. To use methods of recurrent selection for total combining ability, convergent improvement and cumulative breeding is rational in order to increase a level of demonstration of the trait seed weight per a plant in studied lines.