摘要
在控温及自然条件下，比较研究了２２个光（温）敏不育系育性表达对温度的反应差异，结果表明，用２２～２４Ｃ＋１４ｈ光照在育性表达敏感期连续处理７～１０ｄ，部分不育系败育彻底，花粉可染率与自交结实率均为０；部分材料花粉可染率为０．１％～４．２％，但自交结实率为０；还有一部分材料不但花粉可育（可染率０．５％～８０．７％），而且自交结实（结实率０．１％～５４．８％）．不育系ｇ０５２１Ｓ育性转换方向与其它不育系相反，即高温可育，低温不育。
The temperature responsive difference of fertility expression of 22 P(T)GMS lines in rice under artificial low temperature and natural conditions was studied. The results were as follows: ①Treating P (T)GMS lines with constant 22～24℃ and 14 hour daylength in their sensitive stages for 7 or 10 days, some lines expressed thoroughly sterility without any fertile pollen grains and selfed seeds; some produced a few fertile pollen grains with a stainable pollen percentage of 0.1%～4.2%, but no selfed seeds set, and some anthers expressed fertility with both fertile pollen grains (0.5%～80.7%) and selfed seeds (0.l%～ 54.8% ). ②Under the natural conditions in Changsha in 1995, 21 of 22 P(T)GMS lines expressed sterility when temperature was high in Summer and early autumn, and fertility when temperature was low in middle autumn, but of g0521S expressed fertility in summer and early autumn while sterility in middle autumn. The date of fertility alteration is different among them. It was early for those P(T)GMS lines which produced seeds under artificial low temperature, but it was late for those which didn't produce seeds.
出处
《杂交水稻》
CSCD
北大核心
1998年第S2期71-72,共2页
Hybrid Rice
基金
湖南省科委资助项目
