The research results of inheritance of seed yield trait in interline sunflower hybrids

The purpose of the research is to study inheritance of seeds yield trait in interline sunflower CMS-hybrids. The tests were conducted on fields of VNIIMK, Krasnodar, Russia, in 2012-2014. In 2012, two modern maternal forms (a line VА 93 А, seeds yield is 1.30 t per ha, and a simple CMS-hybrid Kubansky 93 А with higher yield - 2.56 t per ha) 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 a studied trait. The received 20 samples of hybrids and their parental components were estimated on seed yield trait in 2013-2014. The data of research allowed stating that epistasis is absent in inheritance of seed yield trait in studied interline hybrids. The main role in genetic control of this trait belongs to additive interrelation of genes. 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 economically valuable traits in studied lines.