Breeding Technology of eui-hybrids of Rice

<正> Induced mutants of elongated uppermost internode (eui) were directly obtained after irradiation on maintainer (B) and restorer (R) lines of hybrid rice. CMS lines(A) with eui (referred to as eA), restorer lines with eui (referred to as eR) as well as hybrid rice with eui gene (referred to as e-hybrids)were developed. The results showed that the eui mutation frequency averaged 0.10‰ at a range of 0.02‰- 0.47‰ varying with applied dosage and mutated materials. Genetic diversities of eui stock, and a new eui gene, tem-