Phenotypic display of a trait oil content in seeds in interline sunflower hybrids

Experiments on studying of inheritance of a trait oil content in seeds in interline sunflower CMS-hybrids were conducted in fields of the All-Russian research institute of oil crops, Krasnodar, Russia, in 2012-2014. Two CMS-forms (a line VA 93 A with a middle oil content in seeds - 43.2% and a simple hybrid Kubansky 93 A with a higher content - 46.8%) were used as maternal components. As paternal components, 10 fertile lines of the different origin having high or average combining ability on oil content were involved. Pollination of the maternal lines was done in 2012. The obtained 20 hybrids and their parental forms were studied on the trait oil content in seeds in 2013-2014. Results showed that inheritance of the trait oil content in seeds in studied interline sunflower CMS-hybrids was caused by influence of the additive gen interaction and dominance. To increase oil content in seeds of the studied parental germplasm it is reasonable to use the methods of recurrent selection for a common combining ability, convergent improvement and cumulative breeding.