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前言 人工诱变获得的同源四倍体水稻,能显著增加谷粒千粒重,这是值得利用的一个优良性状。但同源四倍体水稻原种,存在着结实率低等一些缺点,不能直接用于生产。中国农业科学院在鲍文奎研究员主持下,通过四倍体水平上的籼粳亚种间杂交等多种培育选择手段,已获得了一批各具特色的优良选系材料。但由于杂种分离世代长,尚未能综合各优良性状于一个稳定的品种上而用于生产。我们在杂交水稻选育工作的基础上,试
Introduction The autotetraploid rice obtained by artificial mutagenesis can significantly increase the 1000-grain weight of grain, which is an excellent trait worth using. However, autotetraploid rice seeds have some shortcomings of low seed setting rate and can not be directly used for production. Under the auspices of researcher Bao Wenkui of the Chinese Academy of Agricultural Sciences, a number of excellent lineage selection materials have been obtained through various breeding and selection methods such as indica-japonica cross-species hybridization at the tetraploid level. However, since hybrids have been isolated for a long period of time, they have not yet been able to be used for production on the basis of a stable variety of fine traits. We are based on hybrid rice breeding work, try