Abstract: The inheritance of short root character in rice (Oryza sativa L.) was studied by investigating the length of crown root of plants in generations of P₁, P₂, F₁, F₂, B₁₁, B'₁₁, B₁₂, B'₁₂ and F₃ which were made by crossing the short root mutants RM1, RM2 with the original type Ohchikara. As shown by the results. the short root in the mutants was controlled by a single locus recessive nuclear genes (srt1srt1), and the gene in RM1, RM2 was allelic. The application of srt1 gene to the rapid identification of hybrid rice seed purity was discussed.

Key words: gene, genetic analysis, short root

摘要： 用水稻短根突变化RM1、RM2与原品种Ohchikara杂交配成两个组合的P₁、 P₂、 F₁、 F₂、 B₁₁、B'₁₁、B₁₂、 B'₁₂ 以及F₃世代，调查冠根长度，研究短根性状的遗传。结果表明，RM1和RM2的短根性状均受单个位点稳性核基因（srt1srt1），并且RM1和RM2的短根基因是等位的。讨论了srt1基因在杂交稻和中子纯度快速鉴定中的应用。

关键词: 基因, 短根, 遗传分析, 水稻, 遗传