籼型光(温)敏核不育系对变动低温忍耐性的初步研究

Study on Patience of Changing Low Temperature in Indica P (T) GMS Lines

1992年和1993年系统观察了3个不同类型的籼型光（温）敏核不育系在自然条件下的育性表现，同时结合人工遮光试验，对光（温）敏核不育系在盛夏“高温──低温──高温”条件下变动低温的忍耐性进行了初步研究。结果表明，在低于起点温度的变动低温诱导下，籼型光（温）敏核不育系起点温度愈低，对低温敏感的幼穗分化时期愈早，育性波动时间愈迟，波动幅度愈小。对光（温）敏核不育系的选育和生产制种有一定指导意义。

Systematic researches were made on the fertility of three different type Indeca P (T) GMS lines w6154s, ×07s,Peiai 64s under natural condition and controiled short daylength from 1992 to 1993. The Indica P (T) GMS lines showed that the stronger the patience tc. changing low temperature, the later is changing date and the iower is changing range in fertility, under 'high-low-high' changing low-temperature lower than starting ternperature of theirs in summer season