利用智能水温控制系统鉴定水稻雄性核不育起点温度

Identification of the Critical Sterility-inducing Temperature of Genic Male Sterile Lines with Intelligent Water-temperature Control System in Rice

利用智能水温控制系统,设置22℃、23℃和24℃3个不同温度处理水平,对培矮64S、广占63S、Y58S、新安S和广茉S共5个两用核不育系分别经过5 d和7 d的处理,对其不育起点温度进行鉴定。试验结果表明,低温处理对不育系的抽穗有延迟作用且使抽穗历期拉长;5个不育系的不育起点温度除培矮64S为23℃外其余均为24℃。在起点温度鉴定中,育性诱导时期的掌握、低温处理后的材料管理、取样单穗的选择等环节对鉴定的准确性至关重要。

To identify the critical sterility-inducing temperature of dual purpose genic male sterile lines, Pei＇ai 64S, Guangzhan 63S, Y58S, Xin＇an S and Guangmo S were treated 5 days and 7 days with 22 ℃, 23℃and 24℃respectively. The results showed that low temperature treatment delayed heading dates and elongated the days from initial heading to ending heading. Sterile starting tempera-tures of all the 5 sterile lines were 24 ℃except Peiai 64S, which was 23 ℃. In the process of identification of the critical sterility-in-ducing temperature, the confirmation of development stage of young panicles for inducing, the managements of materials after low tem-perature treatment and the correct sampling of individual panicles were important factors affecting the accuracy of identification.