杂交香稻的香味遗传模式及育种研究

 以川香28A和川香84A与无香味的恢复系CDR22、成恢177等杂交，研究F₁和F₂单粒稻米的香味遗传特点。结果表明F₁稻米无香味，恢复系的无香味表现胚乳直感现象；杂种稻米(F₂)无香味∶有香味符合15∶1的遗传分离比。川香28A与香稻恢复系636杂交，F₁和杂种稻米(F₂)的每粒米都有香味。结合过去的有关研究，提出杂交香稻香味遗传的双基因模式。介绍了运用香稻亲本转育香味基因，选育香稻保持系、恢复系和杂交香稻的育种方法和进展。

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.