杂交稻种子贮藏技术及寿命预测研究

对水稻三系配套的雄性不育系、保持系、恢复系乃其杂交一代种子,在各种恒定的含水量和室温下贮存,测定其寿命变比。发现不育系和杂交一代种子的安全水分比保持系和恢复系的13％(国家标准对普通籼稻常规品种的最高限度)低2％;不育系和杂种一代种子水分在11％时、寿命变化最接近典型的反S形生存曲线,当发芽率降到80％左右时,生存曲线急速下降。根据典型生存曲线规律,拟配合新的寿命预测方程。

STUDY ON SEED STORAGE TECHNIQUE AND LONGEVITY IN HYBRID RICE

Studies on the longevity of the seeds of three rice lines and their F1 hybrids with different moisture contents were conducted. This study found that: the safe moisture contents of male sterile lines and F1hybrids had decreased by 2% as compared with 13% for the maintainer lines and restorer lines, which is the upper limit of national standard moisture content for conventional rice varieties; The seed moisture content of the male sterile line and F1 hybrids is just about 11%, and the variation in longevity tends to show a typical contra-S - shaped survival curve. As the sprouting rate decreased to 80% the survival curve descended rapidly. According to the rules of the typical survival curve, we can set up several new equations to predict seed longvity.