摘要
在广州利用人工气候箱和冬季温室栽培技术研究了培矮 64S提纯群体和未提纯群体育性转换的光温反应特性。结果表明 :培矮 64S在较低温 (日均温 2 0～ 2 5℃ )条件下 ,表现较强的发育感光性和育性光敏性 ;培矮 64S提纯群体和未提纯群体内单株育性转换的光温临界值均出现分离 ,但提纯群体内的光温临界值分离幅度较小。该提纯群体在 13h/ 2 4℃光温处理中群体的平均自交不实率为 99.6% ,达到实用核不育系的不育度标准 ;在日长为 13h以上 ,日均温高于 2 4℃的地区和季节制种 。
The photo /thermo sensitive characteristics of male fertility conversion for purifed and unpurified populations of a rice male sterile line Peiai 64S were investigated under different treatments of photoperiod and temperature combinations in phytotron and in greenhouse in winter, Guangzhou. The results showed that Peiai 64S was strongly sensitive to photoperiods at both stages of vegetative growth and pancical development under the condition of average temperature 20~25℃. Although both populations, purified and unpurified, segregated in critical photoperiod and temperature, the purified population had smaller variation in critical photoperiod and temperature than the unpurified one. The average sterile spikelet rate on selfing of the purified population treated with 13 h/24℃ was 99 6%, and reached the sterility standard of practical P/TGMS lines by the national “863” program. It could be used for seed production in the regions or the seasons with the photoperiod of longer than 13h and average temperature of over 24℃.
出处
《作物研究》
2000年第4期5-8,共4页
Crop Research
基金
国家"8 63"计划! ( Z16- 0 1- 0 6)
广东省自然科学基金!( 970 670 )资助
关键词
水稻
核不育系
育性转换
光温特性
培矮64S
Rice
P/TGMS line
Fertility conversion
Photo /thermo sensitivity
Peiai 64S
