Using A3, A4, and 9E CMS Types in Breeding Grain Sorghum Hybrids

Аннотация

The results of the evaluation of the combining ability (GCA and SCA effects; SCA dispersions) of the sorghum CMS lines in the test crosses have been reported. Inclusion of the Zheltozernyi 10 genome maternal lines differing in the type of the sterile cytoplasm (A3, A4, and 9E) into the crossing program can provide the opportunity to perform the pure genetic analysis of the cytoplasmic effects on the combining ability. Eighteen pollinators of the grain sorghum selected in the Rossorgo Russian Research and Project-Technological Institute of Sorghum and Corn were used as the paternal parents. A significant influence of the 9E cytoplasm on the GCA effects of the maternal line inflorescence length was revealed. The dominance additive genetic effects in the genetically controlled traits of the CMS lines (plant height, inflorescence and labellum parameters, and grain crop yield) were recorded. The 9E Zheltozernoe 10/Magistr hybrid is recommended for the competitive variety trials, while the seven combinations are advised to be included into the three-line hybrid system.