Aroma Genetic Model and Breeding of Aromatic Hybrid Rice

The crosses were made between the aromatic cytoplasmic male sterile (CMS) lines Chuanxiang 28A and Chuanxiang84A and non--aromatic restorers CDR22, CH047, DH1, CH90625, and CH177 to study the genetic characteristics of aroma of singlegrain in F, and F, progenies. The results indicated that each grain in F, was non-aromatic, and non-aroma of restorers was xenia, andhybrid rice grains (the F, progenies)segregated at a 15: 1 (non-aromatic: aromatic)ratio. Each grain of F, and F: of Chuanxiang 28Acrossed with aromatic restorer 636 was aromatic. The pattern of double genes of aroma in aromatic hybrid rice was proposed and breeding methods and progress in aromatic maintainers and restorers and hybrids by using aromatic genes of rice germplasm were introduced.