Combining ability and heterosis effects in sunflower of Byelorussian origin

Twenty-eight hybrids were generated by crossing seven male sterile lines with four restorers in the line × tester cross system. GCA and SCA effects of parental lines and heterosis effect of F1 hybrids have been evaluated for 4 characters. Two of the twenty-eight Byelorussian hybrids (Donskoy 22 and Signal) revealed higher values for oil yield with respect to standard checks. According to the data obtained it is quite possible to produce prospective Byelorussian hybrids under local soil-climatic conditions