水稻短根的遗传分析

Genetic Analysis of Short Root in Rice(Oryza sativa L.)

用水稻短根突变体ＲＭ１、ＲＭ２与原品种Ｏｈｃｈｉｋａｒａ杂交配成两个组合的Ｐ１、Ｐ２、Ｆ１、Ｆ２、Ｂ（１１）、Ｂ’（１１）、Ｂ（１２）、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隐性核基因（ｓｒｔｌｓｒｔｌ）控制，并且ＲＭ１和ＲＭ２的短根基因是等位的。讨论了ｓｒｔｌ基因在杂交稻种子纯度快速鉴定中的应用。

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 (srtlsrtl). and the gene in RM1. RM2 was allelic. The application of srtl gene to the rapid identification of hybrid rice seed purity was discussed.